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<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title>熊峰的博客 - Seifon's Blog</title>
<icon>https://www.gravatar.com/avatar/7ac49c33c147e472add17a2c25693e10</icon>
<subtitle>不定期分享一些个人开发经验</subtitle>
<link href="/atom.xml" rel="self"/>
<link href="http://www.seifon.cn/"/>
<updated>2019-08-04T04:37:09.607Z</updated>
<id>http://www.seifon.cn/</id>
<author>
<name>Seifon</name>
<email>[email protected]</email>
</author>
<generator uri="http://hexo.io/">Hexo</generator>
<entry>
<title>JVM调优之探索CMS和G1的物理内存归还机制</title>
<link href="http://www.seifon.cn/2019/08/04/JVM%E8%B0%83%E4%BC%98%E4%B9%8B%E6%8E%A2%E7%B4%A2CMS%E5%92%8CG1%E7%9A%84%E7%89%A9%E7%90%86%E5%86%85%E5%AD%98%E5%BD%92%E8%BF%98%E6%9C%BA%E5%88%B6/"/>
<id>http://www.seifon.cn/2019/08/04/JVM调优之探索CMS和G1的物理内存归还机制/</id>
<published>2019-08-04T04:37:01.000Z</published>
<updated>2019-08-04T04:37:09.607Z</updated>
<content type="html"><![CDATA[<h3 id="前言："><a href="#前言：" class="headerlink" title="前言："></a>前言：</h3><p>公司有一个资产统计系统，使用频率很低，但是要求在使用时查询速度快，因此想到做一些缓存放在内存中，在长时间没有使用，就持久化到磁盘中，并对垃圾进行回收，归还物理内存给操作系统，从而节省宝贵资源给其它业务系统。当我做好缓存时，却发现了一个棘手的问题，通过程序释放资源并通知GC回收资源后，堆内存的已用内存减少了，空闲内存增加了，可是进程占用系统内存却没有减少。查阅了很多资料，也尝试过很多次，都没有完美解决问题。直到后来看到一段评论谈及G1垃圾回收器，才恍然大悟。</p><p>接下来，通过一个小demo给大家演示一下两种垃圾回收器对物理内存归还的区别。如果有什么不对的地方，希望大家能够在评论里面指正。</p><ul><li>堆大小配置：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">-Xms128M -Xmx2048M</span><br></pre></td></tr></table></figure><h3 id="先附上测试代码："><a href="#先附上测试代码：" class="headerlink" title="先附上测试代码："></a>先附上测试代码：</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br></pre></td><td class="code"><pre><span class="line">import org.junit.Test;</span><br><span class="line"></span><br><span class="line">import java.util.ArrayList;</span><br><span class="line">import java.util.List;</span><br><span class="line"></span><br><span class="line">public class MemoryRecycleTest {</span><br><span class="line"></span><br><span class="line"> @Test</span><br><span class="line"> public void testMemoryRecycle() throws InterruptedException {</span><br><span class="line"></span><br><span class="line"> List list = new ArrayList();</span><br><span class="line"></span><br><span class="line"> //指定要生产的对象大小为512m</span><br><span class="line"> int count = 512;</span><br><span class="line"></span><br><span class="line"> //新建一条线程，负责生产对象</span><br><span class="line"> new Thread(() -> {</span><br><span class="line"> try {</span><br><span class="line"> for (int i = 1; i <= 10; i++) {</span><br><span class="line"> System.out.println(String.format("第%s次生产%s大小的对象", i, count));</span><br><span class="line"> addObject(list, count);</span><br><span class="line"> //休眠40秒</span><br><span class="line"> Thread.sleep(i * 10000);</span><br><span class="line"> }</span><br><span class="line"> } catch (InterruptedException e) {</span><br><span class="line"> e.printStackTrace();</span><br><span class="line"> }</span><br><span class="line"> }).start();</span><br><span class="line"></span><br><span class="line"> //新建一条线程，负责清理list，回收jvm内存</span><br><span class="line"> new Thread(() -> {</span><br><span class="line"> for (;;) {</span><br><span class="line"> //当list内存到达512m，就通知gc回收堆</span><br><span class="line"> if (list.size() >= count) {</span><br><span class="line"> System.out.println("清理list.... 回收jvm内存....");</span><br><span class="line"> list.clear();</span><br><span class="line"> //通知gc回收</span><br><span class="line"> System.gc();</span><br><span class="line"> //打印堆内存信息</span><br><span class="line"> printJvmMemoryInfo();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }).start();</span><br><span class="line"></span><br><span class="line"> //阻止程序退出</span><br><span class="line"> Thread.currentThread().join();</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void addObject(List list, int count) {</span><br><span class="line"> for (int i = 0; i < count; i++) {</span><br><span class="line"> OOMobject ooMobject = new OOMobject();</span><br><span class="line"> //向list添加一个1m的对象</span><br><span class="line"> list.add(ooMobject);</span><br><span class="line"> try {</span><br><span class="line"> //休眠100毫秒</span><br><span class="line"> Thread.sleep(100);</span><br><span class="line"> } catch (InterruptedException e) {</span><br><span class="line"> e.printStackTrace();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static class OOMobject{</span><br><span class="line"> //生成1m的对象</span><br><span class="line"> private byte[] bytes=new byte[1024*1024];</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static void printJvmMemoryInfo() {</span><br><span class="line"> // 虚拟机级内存情况查询</span><br><span class="line"> long vmFree = 0;</span><br><span class="line"> long vmUse = 0;</span><br><span class="line"> long vmTotal = 0;</span><br><span class="line"> long vmMax = 0;</span><br><span class="line"> int byteToMb = 1024 * 1024;</span><br><span class="line"> Runtime rt = Runtime.getRuntime();</span><br><span class="line"> vmTotal = rt.totalMemory() / byteToMb;</span><br><span class="line"> vmFree = rt.freeMemory() / byteToMb;</span><br><span class="line"> vmMax = rt.maxMemory() / byteToMb;</span><br><span class="line"> vmUse = vmTotal - vmFree;</span><br><span class="line"> System.out.println("");</span><br><span class="line"> System.out.println("JVM内存已用的空间为：" + vmUse + " MB");</span><br><span class="line"> System.out.println("JVM内存的空闲空间为：" + vmFree + " MB");</span><br><span class="line"> System.out.println("JVM总内存空间为：" + vmTotal + " MB");</span><br><span class="line"> System.out.println("JVM总内存最大堆空间为：" + vmMax + " MB");</span><br><span class="line"> System.out.println("");</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h3 id="首先使用CMS垃圾回收器："><a href="#首先使用CMS垃圾回收器：" class="headerlink" title="首先使用CMS垃圾回收器："></a>首先使用CMS垃圾回收器：</h3><ul><li>将jvm运行参数设置为如下：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">-Xms128M -Xmx2048M -XX:+UseConcMarkSweepGC</span><br></pre></td></tr></table></figure><p><img src="http://img.seifon.cn/343f1dd4c397964981a5cb088dbd6c09.png" alt="image"></p><ul><li>运行程序后，使用JProfiler查看堆内存情况：</li></ul><p><img src="http://img.seifon.cn/cebbdfbf474b62ac70995487f58a2a58.png" alt="image"></p><ul><li>查看控制台打印的内容：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br></pre></td><td class="code"><pre><span class="line">第1次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：6 MB</span><br><span class="line">JVM内存的空闲空间为：936 MB</span><br><span class="line">JVM总内存空间为：942 MB</span><br><span class="line">JVM总内存最大堆空间为：1990 MB</span><br><span class="line"></span><br><span class="line">第2次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：1025 MB</span><br><span class="line">JVM总内存空间为：1029 MB</span><br><span class="line">JVM总内存最大堆空间为：1990 MB</span><br><span class="line"></span><br><span class="line">第3次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：680 MB</span><br><span class="line">JVM总内存空间为：684 MB</span><br><span class="line">JVM总内存最大堆空间为：1990 MB</span><br><span class="line"></span><br><span class="line">第4次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：119 MB</span><br><span class="line">JVM总内存空间为：123 MB</span><br><span class="line">JVM总内存最大堆空间为：1990 MB</span><br><span class="line"></span><br><span class="line">第5次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：119 MB</span><br><span class="line">JVM总内存空间为：123 MB</span><br><span class="line">JVM总内存最大堆空间为：1990 MB</span><br><span class="line"></span><br><span class="line">第6次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：119 MB</span><br><span class="line">JVM总内存空间为：123 MB</span><br><span class="line">JVM总内存最大堆空间为：1990 MB</span><br><span class="line"></span><br><span class="line">第7次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：119 MB</span><br><span class="line">JVM总内存空间为：123 MB</span><br><span class="line">JVM总内存最大堆空间为：1990 MB</span><br><span class="line"></span><br><span class="line">第8次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：119 MB</span><br><span class="line">JVM总内存空间为：123 MB</span><br><span class="line">JVM总内存最大堆空间为：1990 MB</span><br><span class="line"></span><br><span class="line">第9次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：119 MB</span><br><span class="line">JVM总内存空间为：123 MB</span><br><span class="line">JVM总内存最大堆空间为：1990 MB</span><br></pre></td></tr></table></figure><ul><li>查看jmap heap 信息：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br></pre></td><td class="code"><pre><span class="line">C:\Users>jmap -heap 4716</span><br><span class="line">Attaching to process ID 4716, please wait...</span><br><span class="line">Debugger attached successfully.</span><br><span class="line">Server compiler detected.</span><br><span class="line">JVM version is 25.161-b12</span><br><span class="line"></span><br><span class="line">using parallel threads in the new generation.</span><br><span class="line">using thread-local object allocation.</span><br><span class="line">Concurrent Mark-Sweep GC</span><br><span class="line"></span><br><span class="line">Heap Configuration:</span><br><span class="line"> MinHeapFreeRatio = 40</span><br><span class="line"> MaxHeapFreeRatio = 70</span><br><span class="line"> MaxHeapSize = 2122317824 (2024.0MB)</span><br><span class="line"> NewSize = 44695552 (42.625MB)</span><br><span class="line"> MaxNewSize = 348913664 (332.75MB)</span><br><span class="line"> OldSize = 89522176 (85.375MB)</span><br><span class="line"> NewRatio = 2</span><br><span class="line"> SurvivorRatio = 8</span><br><span class="line"> MetaspaceSize = 21807104 (20.796875MB)</span><br><span class="line"> CompressedClassSpaceSize = 1073741824 (1024.0MB)</span><br><span class="line"> MaxMetaspaceSize = 17592186044415 MB</span><br><span class="line"> G1HeapRegionSize = 0 (0.0MB)</span><br><span class="line"></span><br><span class="line">Heap Usage:</span><br><span class="line">New Generation (Eden + 1 Survivor Space):</span><br><span class="line"> capacity = 280887296 (267.875MB)</span><br><span class="line"> used = 1629392 (1.5539093017578125MB)</span><br><span class="line"> free = 279257904 (266.3210906982422MB)</span><br><span class="line"> 0.5800874668251284% used</span><br><span class="line">Eden Space:</span><br><span class="line"> capacity = 249692160 (238.125MB)</span><br><span class="line"> used = 1629392 (1.5539093017578125MB)</span><br><span class="line"> free = 248062768 (236.5710906982422MB)</span><br><span class="line"> 0.6525603366961942% used</span><br><span class="line">From Space:</span><br><span class="line"> capacity = 31195136 (29.75MB)</span><br><span class="line"> used = 0 (0.0MB)</span><br><span class="line"> free = 31195136 (29.75MB)</span><br><span class="line"> 0.0% used</span><br><span class="line">To Space:</span><br><span class="line"> capacity = 31195136 (29.75MB)</span><br><span class="line"> used = 0 (0.0MB)</span><br><span class="line"> free = 31195136 (29.75MB)</span><br><span class="line"> 0.0% used</span><br><span class="line">concurrent mark-sweep generation:</span><br><span class="line"> capacity = 624041984 (595.1328125MB)</span><br><span class="line"> used = 4169296 (3.9761505126953125MB)</span><br><span class="line"> free = 619872688 (591.1566619873047MB)</span><br><span class="line"> 0.6681114583470076% used</span><br><span class="line"></span><br><span class="line">6718 interned Strings occupying 574968 bytes.</span><br></pre></td></tr></table></figure><p>通过统计图和控制台日志，可以看到在运行43秒左右前，使用内存呈直线平滑上升，开辟的内存呈阶梯状上升。当使用内存到达525m时，程序发起了System.gc()，此时垃圾被回收了，因此使用内存回到了10m，可是jvm开辟出来的内存空间却没有归还给操作系统，导致程序一直霸占着960m左右的内存资源。第二次生产对象时，可以看到在运行53秒至1分44秒时，不再开辟新空间，而是重复利用已开辟的内存继续创建对象，当执行第二次System.gc()时，jvm又开辟了一小部分内存，这一次程序霸占了1050m内存资源。第三次生产对象时，可以看到在运行2分05秒至2分55秒时，不再开辟新空间，而是重复利用已开辟的内存继续创建对象，当执行到第三次System.gc()时，jvm归还了一部分内存给操作系统，此时依然霸占着700m内存。……..循环执行10次……从总的情况，可以看出，随着System.gc()次数逐渐增加和时间间隔逐渐拉大，从继续开辟内存变成了慢慢归还内存给了操作系统，直到后面将物理内存全部归还给操作系统。</p><h3 id="接下来使用G1垃圾回收器："><a href="#接下来使用G1垃圾回收器：" class="headerlink" title="接下来使用G1垃圾回收器："></a>接下来使用G1垃圾回收器：</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">-Xms128M -Xmx2048M -XX:+UseG1GC</span><br></pre></td></tr></table></figure><p><img src="http://img.seifon.cn/8c6ac8d8a33bdf42f6511ce3cb2d59ba.png" alt="image"></p><ul><li>运行程序后，使用JProfiler查看堆内存情况：</li></ul><p><img src="http://img.seifon.cn/cc51dc7f2f0260d88ca84c25ffee1dfa.png" alt="image"></p><ul><li>查看控制台打印的内容：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br></pre></td><td class="code"><pre><span class="line">第1次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：5 MB</span><br><span class="line">JVM内存的空闲空间为：123 MB</span><br><span class="line">JVM总内存空间为：128 MB</span><br><span class="line">JVM总内存最大堆空间为：2024 MB</span><br><span class="line"></span><br><span class="line">第2次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：124 MB</span><br><span class="line">JVM总内存空间为：128 MB</span><br><span class="line">JVM总内存最大堆空间为：2024 MB</span><br><span class="line"></span><br><span class="line">第3次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：124 MB</span><br><span class="line">JVM总内存空间为：128 MB</span><br><span class="line">JVM总内存最大堆空间为：2024 MB</span><br><span class="line"></span><br><span class="line">第4次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：124 MB</span><br><span class="line">JVM总内存空间为：128 MB</span><br><span class="line">JVM总内存最大堆空间为：2024 MB</span><br><span class="line"></span><br><span class="line">第5次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：124 MB</span><br><span class="line">JVM总内存空间为：128 MB</span><br><span class="line">JVM总内存最大堆空间为：2024 MB</span><br><span class="line"></span><br><span class="line">第6次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：124 MB</span><br><span class="line">JVM总内存空间为：128 MB</span><br><span class="line">JVM总内存最大堆空间为：2024 MB</span><br><span class="line"></span><br><span class="line">第7次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：124 MB</span><br><span class="line">JVM总内存空间为：128 MB</span><br><span class="line">JVM总内存最大堆空间为：2024 MB</span><br><span class="line"></span><br><span class="line">第8次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：124 MB</span><br><span class="line">JVM总内存空间为：128 MB</span><br><span class="line">JVM总内存最大堆空间为：2024 MB</span><br><span class="line"></span><br><span class="line">第9次生产512大小的对象</span><br><span class="line">清理list.... 回收jvm内存....</span><br><span class="line"></span><br><span class="line">JVM内存已用的空间为：4 MB</span><br><span class="line">JVM内存的空闲空间为：124 MB</span><br><span class="line">JVM总内存空间为：128 MB</span><br><span class="line">JVM总内存最大堆空间为：2024 MB</span><br></pre></td></tr></table></figure><ul><li>查看jmap heap 信息：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br></pre></td><td class="code"><pre><span class="line">C:\Users>jmap -heap 18112</span><br><span class="line">Attaching to process ID 18112, please wait...</span><br><span class="line">Debugger attached successfully.</span><br><span class="line">Server compiler detected.</span><br><span class="line">JVM version is 25.161-b12</span><br><span class="line"></span><br><span class="line">using thread-local object allocation.</span><br><span class="line">Garbage-First (G1) GC with 4 thread(s)</span><br><span class="line"></span><br><span class="line">Heap Configuration:</span><br><span class="line"> MinHeapFreeRatio = 40</span><br><span class="line"> MaxHeapFreeRatio = 70</span><br><span class="line"> MaxHeapSize = 2122317824 (2024.0MB)</span><br><span class="line"> NewSize = 1363144 (1.2999954223632812MB)</span><br><span class="line"> MaxNewSize = 1272971264 (1214.0MB)</span><br><span class="line"> OldSize = 5452592 (5.1999969482421875MB)</span><br><span class="line"> NewRatio = 2</span><br><span class="line"> SurvivorRatio = 8</span><br><span class="line"> MetaspaceSize = 21807104 (20.796875MB)</span><br><span class="line"> CompressedClassSpaceSize = 1073741824 (1024.0MB)</span><br><span class="line"> MaxMetaspaceSize = 17592186044415 MB</span><br><span class="line"> G1HeapRegionSize = 1048576 (1.0MB)</span><br><span class="line"></span><br><span class="line">Heap Usage:</span><br><span class="line">G1 Heap:</span><br><span class="line"> regions = 2024</span><br><span class="line"> capacity = 2122317824 (2024.0MB)</span><br><span class="line"> used = 8336616 (7.950416564941406MB)</span><br><span class="line"> free = 2113981208 (2016.0495834350586MB)</span><br><span class="line"> 0.39280714253663074% used</span><br><span class="line">G1 Young Generation:</span><br><span class="line">Eden Space:</span><br><span class="line"> regions = 2</span><br><span class="line"> capacity = 83886080 (80.0MB)</span><br><span class="line"> used = 2097152 (2.0MB)</span><br><span class="line"> free = 81788928 (78.0MB)</span><br><span class="line"> 2.5% used</span><br><span class="line">Survivor Space:</span><br><span class="line"> regions = 0</span><br><span class="line"> capacity = 0 (0.0MB)</span><br><span class="line"> used = 0 (0.0MB)</span><br><span class="line"> free = 0 (0.0MB)</span><br><span class="line"> 0.0% used</span><br><span class="line">G1 Old Generation:</span><br><span class="line"> regions = 11</span><br><span class="line"> capacity = 50331648 (48.0MB)</span><br><span class="line"> used = 6239464 (5.950416564941406MB)</span><br><span class="line"> free = 44092184 (42.049583435058594MB)</span><br><span class="line"> 12.396701176961264% used</span><br><span class="line"></span><br><span class="line">6706 interned Strings occupying 573840 bytes.</span><br></pre></td></tr></table></figure><p>通过统计图和控制台日志，可以看到在运行41秒左右前，使用内存呈直线平滑上升，开辟的内存也是呈直线平滑上升。当使用内存到达530m时，程序发起了System.gc()，垃圾被回收，因此使用内存回到了10m。此时会发现神奇的现象出来了，jvm之前开辟出来的剩余内存空间全部归还给了操作系统，内存回到了我们指定的初始jvm堆大小128m。通过多次执行生产对象对比发现，jvm都是在每一次调用System.gc()后全部归还物理内存，不做任何保留。达到了我期望的效果！</p><h3 id="总结："><a href="#总结：" class="headerlink" title="总结："></a>总结：</h3><p>CMS垃圾回收器，在内存开辟后，会随着System.gc()执行次数逐渐增多和回收频率逐渐拉长，从继续开辟内存到慢慢归还物理内存给操作系统，直到出现一次全部归还，就会在每次调用System.gc()都归还所有剩余的物理内存给操作系统；G1恰恰相反，G1是在JVM每次回收垃圾后，主动归还物理内存给操作系统，不做任何保留，大大降低了内存占用。</p><p>另外，查看java堆栈实时情况，推荐使用JProfiler和VisualVM。如果是本地推荐JProfiler，因为功能强大，不过远程配置麻烦；如果是连远程java进程，推荐VisualVM，功能够用，连接远程只需配置一些jvm参数。</p><h3 id="其它说明"><a href="#其它说明" class="headerlink" title="其它说明"></a>其它说明</h3><p>JDK 12将有G1收集器，将内存返回到操作系统(不调用System.gc)“应用程序空闲时”</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">jdk9 增加了这个jvm参数：</span><br><span class="line"></span><br><span class="line">-XX:+ShrinkHeapInSteps</span><br><span class="line">使Java堆渐进地缩小到目标大小，该选项默认开启，经过多次GC后堆缩小到目标大小；如果关闭该选项，那么GC后Java堆将立即缩小到目标大小。如果希望最小化Java堆大小，可以关闭改选项，并配合以下选项：</span><br><span class="line"></span><br><span class="line">-XX:MaxHeapFreeRatio=10 -XX:MinHeapFreeRatio=5</span><br><span class="line"></span><br><span class="line">这样将保持Java堆空间较小，并减少程序的动态占用空间，这对嵌入式应用非常有用，但对于一般应用，可能降低性能。</span><br></pre></td></tr></table></figure><h3 id="参考资料："><a href="#参考资料：" class="headerlink" title="参考资料："></a>参考资料：</h3><p><a href="http://www.imooc.com/wenda/detail/574044" target="_blank" rel="noopener">http://www.imooc.com/wenda/detail/574044</a><br><a href="https://developer.ibm.com/cn/blog/2017/still-paying-unused-memory-java-app-idle/" target="_blank" rel="noopener">https://developer.ibm.com/cn/blog/2017/still-paying-unused-memory-java-app-idle/</a><br><a href="https://gameinstitute.qq.com/community/detail/118528" target="_blank" rel="noopener">https://gameinstitute.qq.com/community/detail/118528</a><br><a href="https://www.zhihu.com/question/30813753" target="_blank" rel="noopener">https://www.zhihu.com/question/30813753</a><br><a href="https://www.zhihu.com/question/29161424" target="_blank" rel="noopener">https://www.zhihu.com/question/29161424</a></p>]]></content>
<summary type="html">
<h3 id="前言："><a href="#前言：" class="headerlink" title="前言："></a>前言：</h3><p>公司有一个资产统计系统，使用频率很低，但是要求在使用时查询速度快，因此想到做一些缓存放在内存中，在长时间没有使用，就持久化到磁盘中，
</summary>
</entry>
<entry>
<title>Feign Stub挡板和Mock</title>
<link href="http://www.seifon.cn/2019/01/28/Feign-Stub%E6%8C%A1%E6%9D%BF%E5%92%8CMock/"/>
<id>http://www.seifon.cn/2019/01/28/Feign-Stub挡板和Mock/</id>
<published>2019-01-28T14:20:58.000Z</published>
<updated>2019-01-28T14:21:07.023Z</updated>
<content type="html"><![CDATA[<h4 id="背景："><a href="#背景：" class="headerlink" title="背景："></a>背景：</h4><p>在项目开发中，会有调用第三方接口的场景。当开发时，对方不愿意提供测试服务器给我们调用，或者有的接口会按调用次数进行计费。当联调时，第三方的测试服务器也可能会出现不稳定，如果他们的服务挂了，我们就一直等着服务恢复，那么这就相当影响效率了。如果我们在开发时，就定义一个挡板或者mock服务，在发起调用时，不直接调到第三方接口，而是调到我们自己的挡板代码或者mock服务，这样就可以避免这些问题了。</p><blockquote><p>优势：</p></blockquote><ul><li>挡板代码，不需要侵入业务代码，可以根据入参做一些动态结果返回</li><li>不需要专门开发一个挡板服务，并且在每次启动客户端都先启动挡板服务</li><li>可以自由选择使用挡板还是Mock数据</li></ul><blockquote><p>详细Demo代码，已经提交到Github，欢迎star</p></blockquote><p>Demo地址: <a href="https://github.com/Seifon/FeignStubMock" target="_blank" rel="noopener">https://github.com/Seifon/FeignStubMock</a></p><hr><h4 id="一、下面我就以一个第三方SMS短信接口来做演示："><a href="#一、下面我就以一个第三方SMS短信接口来做演示：" class="headerlink" title="一、下面我就以一个第三方SMS短信接口来做演示："></a>一、下面我就以一个第三方SMS短信接口来做演示：</h4><p>首先，我们写一个Feign客户端接口，正常调用第三方接口：</p><h5 id="1-定义一个SMS短信的Feign客户端接口："><a href="#1-定义一个SMS短信的Feign客户端接口：" class="headerlink" title="1.定义一个SMS短信的Feign客户端接口："></a>1.定义一个SMS短信的Feign客户端接口：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line">import cn.seifon.example.feignstubmock.dto.YunxunSmsReqDto;</span><br><span class="line">import cn.seifon.example.feignstubmock.dto.YunxunSmsRespDto;</span><br><span class="line">import org.springframework.cloud.openfeign.FeignClient;</span><br><span class="line">import org.springframework.web.bind.annotation.PostMapping;</span><br><span class="line">import org.springframework.web.bind.annotation.RequestBody;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: Seifon</span><br><span class="line"> * @Description:</span><br><span class="line"> * @Date: Created in 10:24 2019/1/7</span><br><span class="line"> */</span><br><span class="line">@FeignClient(name = "smsclient", url = "${sms.url}", primary = false)</span><br><span class="line">public interface YunxunSmsFeign {</span><br><span class="line"></span><br><span class="line"> /**</span><br><span class="line"> *</span><br><span class="line"> * @param request</span><br><span class="line"> * @return {"code":"0","failNum":"0","successNum":"1","msgId":"19012516213625881","time":"20190125162136","errorMsg":""}</span><br><span class="line"> * @return {"code":"107","msgId":"","time":"20190125162358","errorMsg":"手机号码格式错误"}</span><br><span class="line"> */</span><br><span class="line"> @PostMapping("/msg/variable/json")</span><br><span class="line"> YunxunSmsRespDto send(@RequestBody YunxunSmsReqDto request);</span><br><span class="line">}</span><br></pre></td></tr></table></figure><blockquote><p>注意：@FeignClient注解里面的primary属性一定要设置为false,这是为了防止在开启Feign挡板时，出现多个Feign客户端导致启动报错。</p></blockquote><h5 id="2-写一个单元测试："><a href="#2-写一个单元测试：" class="headerlink" title="2.写一个单元测试："></a>2.写一个单元测试：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br></pre></td><td class="code"><pre><span class="line">import cn.seifon.example.feignstubmock.dto.YunxunSmsReqDto;</span><br><span class="line">import cn.seifon.example.feignstubmock.dto.YunxunSmsRespDto;</span><br><span class="line">import cn.seifon.example.feignstubmock.feign.YunxunSmsFeign;</span><br><span class="line">import com.alibaba.fastjson.JSON;</span><br><span class="line">import org.junit.Test;</span><br><span class="line">import org.junit.runner.RunWith;</span><br><span class="line">import org.springframework.beans.factory.annotation.Autowired;</span><br><span class="line">import org.springframework.boot.test.context.SpringBootTest;</span><br><span class="line">import org.springframework.test.context.junit4.SpringRunner;</span><br><span class="line"></span><br><span class="line">@RunWith(SpringRunner.class)</span><br><span class="line">@SpringBootTest</span><br><span class="line">public class FeignStubMockApplicationTests {</span><br><span class="line"> @Autowired</span><br><span class="line"> private YunxunSmsFeign yunxunSmsFeign;</span><br><span class="line"></span><br><span class="line"> @Test</span><br><span class="line"> public void feignStubMockTest() {</span><br><span class="line"> YunxunSmsReqDto yunxunSmsReqDto=new YunxunSmsReqDto();</span><br><span class="line"> yunxunSmsReqDto.setAccount("XXXXXXX");</span><br><span class="line"> yunxunSmsReqDto.setPassword("XXXXXXX");</span><br><span class="line"> yunxunSmsReqDto.setMsg("登录验证码:{$var}，请不要对非本人透露。");</span><br><span class="line"> yunxunSmsReqDto.setParams("13011112222,123456");</span><br><span class="line"> yunxunSmsReqDto.setReport("true");</span><br><span class="line"></span><br><span class="line"> YunxunSmsRespDto send = yunxunSmsFeign.send(yunxunSmsReqDto);</span><br><span class="line"> </span><br><span class="line"> //打印结果</span><br><span class="line"> System.out.println(JSON.toJSON(send));</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h6 id="3-1-我们输入一个正确的手机号，拿一个成功的结果："><a href="#3-1-我们输入一个正确的手机号，拿一个成功的结果：" class="headerlink" title="3.1.我们输入一个正确的手机号，拿一个成功的结果："></a>3.1.我们输入一个正确的手机号，拿一个成功的结果：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line">2019-01-28 11:17:56.718 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] ---> POST http://smssh1.253.com/msg/variable/json HTTP/1.1</span><br><span class="line">2019-01-28 11:17:56.719 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] Content-Type: application/json;charset=UTF-8</span><br><span class="line">2019-01-28 11:17:56.720 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] Content-Length: 160</span><br><span class="line">2019-01-28 11:17:56.720 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] </span><br><span class="line">2019-01-28 11:17:56.721 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] {"account":"XXXXXX","password":"XXXXXXX","msg":"登录验证码:{$var}，请不要对非本人透露。","params":"17311112222,123456","report":"true"}</span><br><span class="line">2019-01-28 11:17:56.721 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] ---> END HTTP (160-byte body)</span><br><span class="line">2019-01-28 11:17:56.958 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] <--- HTTP/1.1 200 OK (236ms)</span><br><span class="line">2019-01-28 11:17:56.960 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] connection: keep-alive</span><br><span class="line">2019-01-28 11:17:56.962 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] content-length: 109</span><br><span class="line">2019-01-28 11:17:56.963 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] content-type: application/json;charset=UTF-8</span><br><span class="line">2019-01-28 11:17:56.965 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] date: Mon, 28 Jan 2019 03:17:56 GMT</span><br><span class="line">2019-01-28 11:17:56.966 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] </span><br><span class="line">2019-01-28 11:17:56.971 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] {"code":"0","failNum":"0","successNum":"1","msgId":"19012811175621982","time":"20190128111756","errorMsg":""}</span><br><span class="line">2019-01-28 11:17:56.972 DEBUG 6920 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] <--- END HTTP (109-byte body)</span><br><span class="line">{"code":"0","failNum":"0","successNum":"1","msgId":"19012811175621982","time":"20190128111756","errorMsg":""}</span><br></pre></td></tr></table></figure><p>此时，我们可以根据日志，看到请求的地址也是第三方的url</p><h6 id="3-2-我们输入一个错误的手机号，拿一个失败的结果："><a href="#3-2-我们输入一个错误的手机号，拿一个失败的结果：" class="headerlink" title="3.2.我们输入一个错误的手机号，拿一个失败的结果："></a>3.2.我们输入一个错误的手机号，拿一个失败的结果：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line">2019-01-28 11:21:15.300 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] ---> POST http://smssh1.253.com/msg/variable/json HTTP/1.1</span><br><span class="line">2019-01-28 11:21:15.301 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] Content-Type: application/json;charset=UTF-8</span><br><span class="line">2019-01-28 11:21:15.302 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] Content-Length: 152</span><br><span class="line">2019-01-28 11:21:15.302 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] </span><br><span class="line">2019-01-28 11:21:15.303 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] {"account":"XXXXX","password":"XXXXXXX","msg":"登录验证码:{$var}，请不要对非本人透露。","params":"173,123456","report":"true"}</span><br><span class="line">2019-01-28 11:21:15.303 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] ---> END HTTP (152-byte body)</span><br><span class="line">2019-01-28 11:21:15.470 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] <--- HTTP/1.1 200 OK (165ms)</span><br><span class="line">2019-01-28 11:21:15.471 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] connection: keep-alive</span><br><span class="line">2019-01-28 11:21:15.473 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] content-length: 87</span><br><span class="line">2019-01-28 11:21:15.474 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] content-type: application/json;charset=UTF-8</span><br><span class="line">2019-01-28 11:21:15.476 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] date: Mon, 28 Jan 2019 03:21:15 GMT</span><br><span class="line">2019-01-28 11:21:15.477 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] </span><br><span class="line">2019-01-28 11:21:15.483 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] {"code":"107","msgId":"","time":"20190128112115","errorMsg":"手机号码格式错误"}</span><br><span class="line">2019-01-28 11:21:15.484 DEBUG 5288 --- [ main] c.s.e.f.feign.YunxunSmsFeign : [YunxunSmsFeign#send] <--- END HTTP (87-byte body)</span><br><span class="line">{"code":"107","msgId":"","time":"20190128112115","errorMsg":"手机号码格式错误"}</span><br></pre></td></tr></table></figure><p>当我们知道了两种情况下出现的结果，那么我们就可以模拟响应结果啦。小技巧：我们可以先跟对方调接口，把各种响应报文保存下来，方便后面直接mock数据</p><hr><h4 id="二、接下来进入挡板编写环节："><a href="#二、接下来进入挡板编写环节：" class="headerlink" title="二、接下来进入挡板编写环节："></a>二、接下来进入挡板编写环节：</h4><h5 id="1-编写一个YunxunSmsFeignStub类，并实现YunxunSmsFeign接口："><a href="#1-编写一个YunxunSmsFeignStub类，并实现YunxunSmsFeign接口：" class="headerlink" title="1.编写一个YunxunSmsFeignStub类，并实现YunxunSmsFeign接口："></a>1.编写一个YunxunSmsFeignStub类，并实现YunxunSmsFeign接口：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br></pre></td><td class="code"><pre><span class="line">import cn.seifon.example.feignstubmock.dto.YunxunSmsReqDto;</span><br><span class="line">import cn.seifon.example.feignstubmock.dto.YunxunSmsRespDto;</span><br><span class="line">import cn.seifon.example.feignstubmock.feign.YunxunSmsFeign;</span><br><span class="line">import org.apache.commons.lang3.RandomUtils;</span><br><span class="line">import org.apache.commons.lang3.StringUtils;</span><br><span class="line">import org.apache.commons.lang3.time.DateFormatUtils;</span><br><span class="line">import org.slf4j.Logger;</span><br><span class="line">import org.slf4j.LoggerFactory;</span><br><span class="line">import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;</span><br><span class="line">import org.springframework.context.annotation.Primary;</span><br><span class="line">import org.springframework.stereotype.Component;</span><br><span class="line"></span><br><span class="line">import java.util.Date;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: Seifon</span><br><span class="line"> * @Description:</span><br><span class="line"> * @Date: Created in 10:24 2019/1/7</span><br><span class="line"> */</span><br><span class="line">@Primary //注意：需要在原Feign接口@FeignClient注解加入primary = false 属性</span><br><span class="line">@Component</span><br><span class="line">@ConditionalOnProperty(name = "feign-stub.yunxun.sms.mode", havingValue = "stub")</span><br><span class="line">public class YunxunSmsFeignStub implements YunxunSmsFeign {</span><br><span class="line"> private static final Logger LOG = LoggerFactory.getLogger(YunxunSmsFeignStub.class);</span><br><span class="line"></span><br><span class="line"> @Override</span><br><span class="line"> public YunxunSmsRespDto send(YunxunSmsReqDto request) {</span><br><span class="line"> YunxunSmsRespDto yunxunSmsRespDto = new YunxunSmsRespDto();</span><br><span class="line"></span><br><span class="line"> //模拟正常响应结果</span><br><span class="line"> yunxunSmsRespDto.setCode("0");</span><br><span class="line"> yunxunSmsRespDto.setFailNum("0");</span><br><span class="line"> yunxunSmsRespDto.setSuccessNum("1");</span><br><span class="line"> yunxunSmsRespDto.setMsgId(String.valueOf(RandomUtils.nextLong(19000000000000000L, 19999999999999999L)));</span><br><span class="line"> yunxunSmsRespDto.setTime(DateFormatUtils.format(new Date(), "yyyyMMddHHmmss"));</span><br><span class="line"> yunxunSmsRespDto.setErrorMsg("");</span><br><span class="line"></span><br><span class="line"> String params = request.getParams();</span><br><span class="line"> String[] paramSplit = StringUtils.split(params, ",");</span><br><span class="line"> if (paramSplit[0].length() != 11) {</span><br><span class="line"> //模拟错误响应结果</span><br><span class="line"> yunxunSmsRespDto.setCode("107");</span><br><span class="line"> yunxunSmsRespDto.setMsgId("");</span><br><span class="line"> yunxunSmsRespDto.setErrorMsg("手机号码格式错误");</span><br><span class="line"> }</span><br><span class="line"> return yunxunSmsRespDto;</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure><blockquote><p>注意：必须标注@Primary注解,否则启动会报错。@ConditionalOnProperty的作用就是根据application.yaml配置的相关属性，判断是否注入Spring容器</p></blockquote><h5 id="2-application-yaml文件，加入下面的配置："><a href="#2-application-yaml文件，加入下面的配置：" class="headerlink" title="2.application.yaml文件，加入下面的配置："></a>2.application.yaml文件，加入下面的配置：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">sms:</span><br><span class="line"> url: 'http://smssh1.253.com'</span><br><span class="line"></span><br><span class="line">#yunxun：代表第三方系统名称，sms：代表业务名称，mode:代表Stub模式，url：代表mock服务地址</span><br><span class="line">feign-stub:</span><br><span class="line"> yunxun:</span><br><span class="line"> sms:</span><br><span class="line"> mode: 'stub'</span><br></pre></td></tr></table></figure><h5 id="3-为了区分返回的内容是挡板结果，我们可以写一个AOP切面打印日志："><a href="#3-为了区分返回的内容是挡板结果，我们可以写一个AOP切面打印日志：" class="headerlink" title="3.为了区分返回的内容是挡板结果，我们可以写一个AOP切面打印日志："></a>3.为了区分返回的内容是挡板结果，我们可以写一个AOP切面打印日志：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br></pre></td><td class="code"><pre><span class="line">import com.alibaba.fastjson.JSON;</span><br><span class="line">import org.apache.commons.lang3.StringUtils;</span><br><span class="line">import org.aspectj.lang.ProceedingJoinPoint;</span><br><span class="line">import org.aspectj.lang.annotation.Around;</span><br><span class="line">import org.aspectj.lang.annotation.Aspect;</span><br><span class="line">import org.aspectj.lang.annotation.Pointcut;</span><br><span class="line">import org.slf4j.Logger;</span><br><span class="line">import org.slf4j.LoggerFactory;</span><br><span class="line">import org.springframework.stereotype.Component;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: Seifon</span><br><span class="line"> * @Description:</span><br><span class="line"> * @Date: Created in 10:24 2019/1/7</span><br><span class="line"> */</span><br><span class="line">@Aspect</span><br><span class="line">@Component</span><br><span class="line">public class FeignStubAspect {</span><br><span class="line"></span><br><span class="line"> private static final Logger LOG = LoggerFactory.getLogger(FeignStubAspect.class);</span><br><span class="line"></span><br><span class="line"> @Pointcut("execution(* cn.seifon.example.feignstubmock..stub.*.*(..))")</span><br><span class="line"> public void pointCut(){}</span><br><span class="line"></span><br><span class="line"> @Around("pointCut()")</span><br><span class="line"> public Object around(ProceedingJoinPoint pjp){</span><br><span class="line"> String name = StringUtils.join(pjp.getTarget().getClass().getName(), ".", pjp.getSignature().getName());</span><br><span class="line"> LOG.info("-----【{}】---- 进入挡板模式... request: 【{}】", name, JSON.toJSON(pjp.getArgs()));</span><br><span class="line"> try {</span><br><span class="line"> Object proceed = pjp.proceed();</span><br><span class="line"> LOG.info("-----【{}】---- 退出挡板模式... request: 【{}】, response: 【{}】", name, JSON.toJSON(pjp.getArgs()), JSON.toJSON(proceed));</span><br><span class="line"> return proceed;</span><br><span class="line"> } catch (Throwable e) {</span><br><span class="line"> e.printStackTrace();</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> return null;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h6 id="4-1-运行之前写的单元测试代码（输入一个正确的手机号）："><a href="#4-1-运行之前写的单元测试代码（输入一个正确的手机号）：" class="headerlink" title="4.1.运行之前写的单元测试代码（输入一个正确的手机号）："></a>4.1.运行之前写的单元测试代码（输入一个正确的手机号）：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">2019-01-28 11:32:51.255 INFO 7488 --- [ main] c.s.e.f.aspect.FeignStubAspect : -----【cn.seifon.example.feignstubmock.feign.stub.YunxunSmsFeignStub.send】---- 进入挡板模式... request: 【[{"msg":"登录验证码:{$var}，请不要对非本人透露。","password":"XXXXXXX","report":"true","params":"13011112222,123456","account":"XXXXXXX"}]】</span><br><span class="line">2019-01-28 11:32:51.975 INFO 7488 --- [ main] c.s.e.f.aspect.FeignStubAspect : -----【cn.seifon.example.feignstubmock.feign.stub.YunxunSmsFeignStub.send】---- 退出挡板模式... request: 【[{"msg":"登录验证码:{$var}，请不要对非本人透露。","password":"XXXXXXX","report":"true","params":"13011112222,123456","account":"XXXXXXX"}]】, response: 【{"code":"0","failNum":"0","successNum":"1","msgId":"19148964234899564","time":"20190128113251","errorMsg":""}】</span><br><span class="line">{"code":"0","failNum":"0","successNum":"1","msgId":"19148964234899564","time":"20190128113251","errorMsg":""}</span><br></pre></td></tr></table></figure><h6 id="4-2-运行之前写的单元测试代码（输入一个错误的手机号）："><a href="#4-2-运行之前写的单元测试代码（输入一个错误的手机号）：" class="headerlink" title="4.2.运行之前写的单元测试代码（输入一个错误的手机号）："></a>4.2.运行之前写的单元测试代码（输入一个错误的手机号）：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">2019-01-28 11:35:27.177 INFO 15204 --- [ main] c.s.e.f.aspect.FeignStubAspect : -----【cn.seifon.example.feignstubmock.feign.stub.YunxunSmsFeignStub.send】---- 进入挡板模式... request: 【[{"msg":"登录验证码:{$var}，请不要对非本人透露。","password":"XXXXXXX","report":"true","params":"130,123456","account":"XXXXXXX"}]】</span><br><span class="line">2019-01-28 11:35:27.900 INFO 15204 --- [ main] c.s.e.f.aspect.FeignStubAspect : -----【cn.seifon.example.feignstubmock.feign.stub.YunxunSmsFeignStub.send】---- 退出挡板模式... request: 【[{"msg":"登录验证码:{$var}，请不要对非本人透露。","password":"XXXXXXX","report":"true","params":"130,123456","account":"XXXXXXX"}]】, response: 【{"code":"107","failNum":"0","successNum":"1","msgId":"","time":"20190128113527","errorMsg":"手机号码格式错误"}】</span><br><span class="line">{"code":"107","failNum":"0","successNum":"1","msgId":"","time":"20190128113527","errorMsg":"手机号码格式错误"}</span><br></pre></td></tr></table></figure><p>以上代码就完成了一个stub挡板功能，可有时候，我们已经拿到第三方接口的返回报文，并切不想去写一大段Stub代码。那么这个时候，我们就可以选择下面的Mock方式去完成我们的功能。</p><hr><h4 id="三、接下来进入Mock环节："><a href="#三、接下来进入Mock环节：" class="headerlink" title="三、接下来进入Mock环节："></a>三、接下来进入Mock环节：</h4><h5 id="1-首先准备一个mock服务，这里我就用自己比较喜欢的一个mock工具（mock-json-server）给大家演示："><a href="#1-首先准备一个mock服务，这里我就用自己比较喜欢的一个mock工具（mock-json-server）给大家演示：" class="headerlink" title="1. 首先准备一个mock服务，这里我就用自己比较喜欢的一个mock工具（mock-json-server）给大家演示："></a>1. 首先准备一个mock服务，这里我就用自己比较喜欢的一个mock工具（mock-json-server）给大家演示：</h5><h6 id="1-1-安装nodejs："><a href="#1-1-安装nodejs：" class="headerlink" title="1.1 安装nodejs："></a>1.1 安装nodejs：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">参看官网：http://nodejs.cn/</span><br></pre></td></tr></table></figure><h6 id="1-2-安装mock-json-server："><a href="#1-2-安装mock-json-server：" class="headerlink" title="1.2 安装mock-json-server："></a>1.2 安装mock-json-server：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">npm install -g mock-json-server</span><br></pre></td></tr></table></figure><h6 id="1-3-新建mock数据文件-命名为：data-json-："><a href="#1-3-新建mock数据文件-命名为：data-json-：" class="headerlink" title="1.3 新建mock数据文件(命名为：data.json)："></a>1.3 新建mock数据文件(命名为：data.json)：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">{</span><br><span class="line"> "/msg/variable/json": {</span><br><span class="line"> "post": {</span><br><span class="line"> "code":"0",</span><br><span class="line"> "failNum":"0",</span><br><span class="line"> "successNum":"1",</span><br><span class="line"> "msgId":"19012516213625881",</span><br><span class="line"> "time":"20190125162136",</span><br><span class="line"> "errorMsg":""</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure><h6 id="1-4-运行："><a href="#1-4-运行：" class="headerlink" title="1.4 运行："></a>1.4 运行：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">mock-json-server {path}/data.json --port=1240</span><br><span class="line"></span><br><span class="line">{path}替换为存放data.json的绝对路径</span><br></pre></td></tr></table></figure><h6 id="1-5-如果显示如下结果，就代表mock服务运行成功："><a href="#1-5-如果显示如下结果，就代表mock服务运行成功：" class="headerlink" title="1.5 如果显示如下结果，就代表mock服务运行成功："></a>1.5 如果显示如下结果，就代表mock服务运行成功：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">JSON Server running at http://localhost:1240/</span><br></pre></td></tr></table></figure><blockquote><p>mock-json-server具体使用文档，请参考：<a href="https://www.npmjs.com/package/mock-json-server" target="_blank" rel="noopener">https://www.npmjs.com/package/mock-json-server</a></p></blockquote><h5 id="2-准备工作做好后，接下来，就进入Mock正式环节："><a href="#2-准备工作做好后，接下来，就进入Mock正式环节：" class="headerlink" title="2. 准备工作做好后，接下来，就进入Mock正式环节："></a>2. 准备工作做好后，接下来，就进入Mock正式环节：</h5><h6 id="2-1-首先，我们定义一个YunxunSmsFeignMock接口，并且继承YunxunSmsFeign接口"><a href="#2-1-首先，我们定义一个YunxunSmsFeignMock接口，并且继承YunxunSmsFeign接口" class="headerlink" title="2.1 首先，我们定义一个YunxunSmsFeignMock接口，并且继承YunxunSmsFeign接口"></a>2.1 首先，我们定义一个YunxunSmsFeignMock接口，并且继承YunxunSmsFeign接口</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><span class="line">import cn.seifon.example.feignstubmock.feign.YunxunSmsFeign;</span><br><span class="line">import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;</span><br><span class="line">import org.springframework.cloud.openfeign.FeignClient;</span><br><span class="line">import org.springframework.context.annotation.Primary;</span><br><span class="line">import org.springframework.stereotype.Component;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: Seifon</span><br><span class="line"> * @Description:</span><br><span class="line"> * @Date: Created in 10:24 2019/1/7</span><br><span class="line"> */</span><br><span class="line">@Primary //注意：需要在原Feign接口@FeignClient注解加入primary = false 属性</span><br><span class="line">@Component</span><br><span class="line">@ConditionalOnProperty(name = "feign-stub.yunxun.sms.mode", havingValue = "mock")</span><br><span class="line">@FeignClient(name = "smsclient-mock", url = "${feign-stub.yunxun.sms.mockUrl}" ,path = "/")</span><br><span class="line">public interface YunxunSmsFeignMock extends YunxunSmsFeign {</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><p>注意：必须标注@Primary注解，否则启动时会报错。@FeignClient里的name属性不能跟原Feign接口名称相同，如果相同会启动报错。@ConditionalOnProperty的作用就是根据application.yaml配置的相关属性，判断是否注入Spring容器</p><h6 id="2-2-application-yaml文件，加入下面的配置："><a href="#2-2-application-yaml文件，加入下面的配置：" class="headerlink" title="2.2 application.yaml文件，加入下面的配置："></a>2.2 application.yaml文件，加入下面的配置：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">sms:</span><br><span class="line"> url: 'http://smssh1.253.com'</span><br><span class="line"></span><br><span class="line">#生产环境请勿添加此配置。mode说明：''-不开启, 'mock'-mock模式, 'stub'-stub模式。url说明：只有mock模式需要配置调试url。fund为第三方机构，repayment是业务名称</span><br><span class="line">#yunxun：代表第三方系统名称，sms：代表业务名称，mode:代表挡板模式，url：代表mock服务地址</span><br><span class="line">feign-stub:</span><br><span class="line"> yunxun:</span><br><span class="line"> sms:</span><br><span class="line"> mode: 'mock'</span><br><span class="line"> mockUrl: "http://localhost:1240"</span><br></pre></td></tr></table></figure><h6 id="2-3-为了区分返回的内容是Mock结果，我们可以写一个AOP切面打印日志："><a href="#2-3-为了区分返回的内容是Mock结果，我们可以写一个AOP切面打印日志：" class="headerlink" title="2.3 为了区分返回的内容是Mock结果，我们可以写一个AOP切面打印日志："></a>2.3 为了区分返回的内容是Mock结果，我们可以写一个AOP切面打印日志：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br></pre></td><td class="code"><pre><span class="line">import com.alibaba.fastjson.JSON;</span><br><span class="line">import org.apache.commons.lang3.StringUtils;</span><br><span class="line">import org.aspectj.lang.ProceedingJoinPoint;</span><br><span class="line">import org.aspectj.lang.annotation.Around;</span><br><span class="line">import org.aspectj.lang.annotation.Aspect;</span><br><span class="line">import org.aspectj.lang.annotation.Pointcut;</span><br><span class="line">import org.slf4j.Logger;</span><br><span class="line">import org.slf4j.LoggerFactory;</span><br><span class="line">import org.springframework.stereotype.Component;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: Seifon</span><br><span class="line"> * @Description:</span><br><span class="line"> * @Date: Created in 10:24 2019/1/7</span><br><span class="line"> */</span><br><span class="line">@Aspect</span><br><span class="line">@Component</span><br><span class="line">public class FeignMockAspect {</span><br><span class="line"></span><br><span class="line"> private static final Logger LOG = LoggerFactory.getLogger(FeignMockAspect.class);</span><br><span class="line"></span><br><span class="line"> @Pointcut("execution(* cn.seifon.example.feignstubmock..mock.*.*(..))")</span><br><span class="line"> public void pointCut(){}</span><br><span class="line"></span><br><span class="line"> @Around("pointCut()")</span><br><span class="line"> public Object around(ProceedingJoinPoint pjp){</span><br><span class="line"> String name = StringUtils.join(pjp.getTarget().getClass().getName(), ".", pjp.getSignature().getName());</span><br><span class="line"> LOG.info("-----【{}】---- 进入Mock模式... request: 【{}】", name, JSON.toJSON(pjp.getArgs()));</span><br><span class="line"> try {</span><br><span class="line"> Object proceed = pjp.proceed();</span><br><span class="line"> LOG.info("-----【{}】---- 退出Mock模式... request: 【{}】, response: 【{}】", name, JSON.toJSON(pjp.getArgs()), JSON.toJSON(proceed));</span><br><span class="line"> return proceed;</span><br><span class="line"> } catch (Throwable e) {</span><br><span class="line"> e.printStackTrace();</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> return null;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h6 id="2-4-运行之前的单元测试类，得到如下结果："><a href="#2-4-运行之前的单元测试类，得到如下结果：" class="headerlink" title="2.4 运行之前的单元测试类，得到如下结果："></a>2.4 运行之前的单元测试类，得到如下结果：</h6><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br></pre></td><td class="code"><pre><span class="line">2019-01-28 16:16:35.567 INFO 8976 --- [ main] c.s.e.f.aspect.FeignMockAspect : -----【com.sun.proxy.$Proxy95.send】---- 进入Mock模式... request: 【[{"msg":"登录验证码:{$var}，请不要对非本人透露。","password":"XXXXXXX","report":"true","params":"13011112222,123456","account":"XXXXXXX"}]】</span><br><span class="line">2019-01-28 16:16:35.934 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] ---> POST http://localhost:1240/msg/variable/json HTTP/1.1</span><br><span class="line">2019-01-28 16:16:35.935 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] Content-Type: application/json;charset=UTF-8</span><br><span class="line">2019-01-28 16:16:35.936 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] Content-Length: 152</span><br><span class="line">2019-01-28 16:16:35.936 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] </span><br><span class="line">2019-01-28 16:16:35.937 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] {"account":"XXXXXXX","password":"XXXXXXX","msg":"登录验证码:{$var}，请不要对非本人透露。","params":"13011112222,123456","report":"true"}</span><br><span class="line">2019-01-28 16:16:35.937 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] ---> END HTTP (152-byte body)</span><br><span class="line">2019-01-28 16:16:36.021 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] <--- HTTP/1.1 200 OK (82ms)</span><br><span class="line">2019-01-28 16:16:36.021 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] access-control-allow-origin: *</span><br><span class="line">2019-01-28 16:16:36.022 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] connection: keep-alive</span><br><span class="line">2019-01-28 16:16:36.023 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] content-length: 109</span><br><span class="line">2019-01-28 16:16:36.023 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] content-type: application/json; charset=utf-8</span><br><span class="line">2019-01-28 16:16:36.024 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] date: Mon, 28 Jan 2019 08:16:36 GMT</span><br><span class="line">2019-01-28 16:16:36.024 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] etag: W/"6d-XqhLoZB8r6IRF2Lb6CWoIVVNhIQ"</span><br><span class="line">2019-01-28 16:16:36.025 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] x-content-type-options: nosniff</span><br><span class="line">2019-01-28 16:16:36.026 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] x-powered-by: Express</span><br><span class="line">2019-01-28 16:16:36.027 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] </span><br><span class="line">2019-01-28 16:16:36.030 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] {"code":"0","failNum":"0","successNum":"1","msgId":"19012516213625881","time":"20190125162136","errorMsg":""}</span><br><span class="line">2019-01-28 16:16:36.030 DEBUG 8976 --- [ main] c.s.e.f.feign.mock.YunxunSmsFeignMock : [YunxunSmsFeignMock#send] <--- END HTTP (109-byte body)</span><br><span class="line">2019-01-28 16:16:36.227 INFO 8976 --- [ main] c.s.e.f.aspect.FeignMockAspect : -----【com.sun.proxy.$Proxy95.send】---- 退出Mock模式... request: 【[{"msg":"登录验证码:{$var}，请不要对非本人透露。","password":"XXXXXXX","report":"true","params":"13011112222,123456","account":"XXXXXXX"}]】, response: 【{"code":"0","failNum":"0","successNum":"1","msgId":"19012516213625881","time":"20190125162136","errorMsg":""}】</span><br><span class="line">{"code":"0","failNum":"0","successNum":"1","msgId":"19012516213625881","time":"20190125162136","errorMsg":""}</span><br></pre></td></tr></table></figure><p>说明：此时我们根据日志，会发现feign调用的url已经变为我们的Mock服务地址了。同理，如果要返回失败结果，只需要修改data.json文件，再次调用后，即可得到我们想要的结果了。</p><hr><h4 id="四、结语："><a href="#四、结语：" class="headerlink" title="四、结语："></a>四、结语：</h4><p>如果有什么需要改进的地方，或者不正确的地方，请在评论里面提出并指正。谢谢！</p><blockquote><p>详细Demo代码，已经提交到Github，欢迎star</p></blockquote><p>Demo地址: <a href="https://github.com/Seifon/FeignStubMock" target="_blank" rel="noopener">https://github.com/Seifon/FeignStubMock</a></p><p>项目结构,如图：<br><img src="https://github.com/Seifon/FeignStubMock/raw/master/package_tree.png" alt=""></p>]]></content>
<summary type="html">
<h4 id="背景："><a href="#背景：" class="headerlink" title="背景："></a>背景：</h4><p>在项目开发中，会有调用第三方接口的场景。当开发时，对方不愿意提供测试服务器给我们调用，或者有的接口会按调用次数进行计费。当联调时，第
</summary>
</entry>
<entry>
<title>踩坑 Spring Cloud Hystrix 线程池队列配置</title>
<link href="http://www.seifon.cn/2018/12/08/%E8%B8%A9%E5%9D%91-Spring-Cloud-Hystrix-%E7%BA%BF%E7%A8%8B%E6%B1%A0%E9%98%9F%E5%88%97%E9%85%8D%E7%BD%AE/"/>
<id>http://www.seifon.cn/2018/12/08/踩坑-Spring-Cloud-Hystrix-线程池队列配置/</id>
<published>2018-12-08T01:50:00.000Z</published>
<updated>2018-12-08T01:52:54.939Z</updated>
<content type="html"><![CDATA[<h4 id="背景："><a href="#背景：" class="headerlink" title="背景："></a>背景：</h4><p>有一次在生产环境，突然出现了很多笔还款单被挂起，后来排查原因，发现是内部系统调用时出现了Hystrix调用异常。在开发过程中，因为核心线程数设置的比较大，没有出现这种异常。放到了测试环境，偶尔有出现这种情况，后来在网上查找解决方案，网上的方案是调整maxQueueSize属性就好了，当时调整了一下，确实有所改善。可没想到在生产环境跑了一段时间后却又出现这种了情况，此时我第一想法就是去查看maxQueueSize属性，可是maxQueueSize属性是设置值了。当时就比较纳闷了，为什么maxQueueSize属性不起作用，后来通过查看官方文档发现Hystrix还有一个queueSizeRejectionThreshold属性，这个属性是控制队列最大阈值的，而Hystrix默认只配置了5个，因此就算我们把maxQueueSize的值设置再大，也是不起作用的。两个属性必须同时配置</p><h4 id="先看一下正确的Hystrix配置姿势。"><a href="#先看一下正确的Hystrix配置姿势。" class="headerlink" title="先看一下正确的Hystrix配置姿势。"></a>先看一下正确的Hystrix配置姿势。</h4><p>application.yml：</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">hystrix:</span><br><span class="line"> threadpool:</span><br><span class="line"> default:</span><br><span class="line"> coreSize: 200 #并发执行的最大线程数，默认10</span><br><span class="line"> maxQueueSize: 1000 #BlockingQueue的最大队列数，默认值-1</span><br><span class="line"> queueSizeRejectionThreshold: 800 #即使maxQueueSize没有达到，达到queueSizeRejectionThreshold该值后，请求也会被拒绝，默认值5</span><br></pre></td></tr></table></figure><h4 id="接下来编写一个测试类，来验证几种错误配置，看看会出现什么情况。"><a href="#接下来编写一个测试类，来验证几种错误配置，看看会出现什么情况。" class="headerlink" title="接下来编写一个测试类，来验证几种错误配置，看看会出现什么情况。"></a>接下来编写一个测试类，来验证几种错误配置，看看会出现什么情况。</h4><h4 id="测试类代码（A调用方）："><a href="#测试类代码（A调用方）：" class="headerlink" title="测试类代码（A调用方）："></a>测试类代码（A调用方）：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: XiongFeng</span><br><span class="line"> * @Description:</span><br><span class="line"> * @Date: Created in 11:12 2018/6/11</span><br><span class="line"> */</span><br><span class="line">public class RepaymentHelperTest extends FundApplicationTests {</span><br><span class="line"></span><br><span class="line"> @Autowired</span><br><span class="line"> RepaymentHelper repaymentHelper;</span><br><span class="line"> @Autowired</span><br><span class="line"> private RouterFeign routerFeign;</span><br><span class="line"></span><br><span class="line"> @Test</span><br><span class="line"> public void hystrixTest() throws InterruptedException {</span><br><span class="line"></span><br><span class="line"> for (int i = 0; i < 135; i++) {</span><br><span class="line"> new Thread(new Runnable() {</span><br><span class="line"> @Override</span><br><span class="line"> public void run() {</span><br><span class="line"> job();</span><br><span class="line"> }</span><br><span class="line"> }).start();</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> Thread.currentThread().join();</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void job() {</span><br><span class="line"> String repaymentNo = "xf1002";</span><br><span class="line"> String transNo = "T4324324234";</span><br><span class="line"> String reqNo = "xf1002";</span><br><span class="line"> String begintime = "20180831130030";</span><br><span class="line"> String endtime = "20180831130050";</span><br><span class="line"></span><br><span class="line"> TransRecQueryReqDto transRecQueryReqDto = new TransRecQueryReqDto();</span><br><span class="line"> transRecQueryReqDto.setTransNo(transNo);</span><br><span class="line"> transRecQueryReqDto.setBeginTime(begintime);</span><br><span class="line"> transRecQueryReqDto.setEndTime(endtime);</span><br><span class="line"> transRecQueryReqDto.setReqNo(reqNo);</span><br><span class="line"></span><br><span class="line"> Resp<List<TransRecDto>> queryTransRecListResp = routerFeign.queryTransRec(new Req<>(repaymentNo, "2018080200000002", null, null, transRecQueryReqDto));</span><br><span class="line"></span><br><span class="line"> System.out.println(String.format("获取结果为：【%s】", JsonUtil.toJson(queryTransRecListResp)));</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure><ul><li>这个测试类的作用就是创建135个线程，通过RouterFeign类并发请求B服务方，看看请求结果是否出现异常。</li></ul><h4 id="Feign调用代码："><a href="#Feign调用代码：" class="headerlink" title="Feign调用代码："></a>Feign调用代码：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line">@FeignClient(value = "${core.name}", fallbackFactory = RouterFeignBackFactory.class, path = "/router")</span><br><span class="line">public interface RouterFeign {</span><br><span class="line"></span><br><span class="line"> /**</span><br><span class="line"> * 代扣结果查询</span><br><span class="line"> * @param transRecQueryReqDtoReq</span><br><span class="line"> * @return</span><br><span class="line"> */</span><br><span class="line"> @PostMapping("/queryTransRec")</span><br><span class="line"> Resp<List<TransRecDto>> queryTransRec(@RequestBody Req<TransRecQueryReqDto> transRecQueryReqDtoReq);</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><ul><li>这个类，就是通过Feign方式去调用B服务方的客户端</li></ul><h4 id="服务提供方代码（B服务方）："><a href="#服务提供方代码（B服务方）：" class="headerlink" title="服务提供方代码（B服务方）："></a>服务提供方代码（B服务方）：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line">/**</span><br><span class="line"> * @Author: XiongFeng</span><br><span class="line"> * @Description:</span><br><span class="line"> * @Date: Created in 16:04 2018/5/24</span><br><span class="line"> */</span><br><span class="line">@Api("还款服务")</span><br><span class="line">@RefreshScope</span><br><span class="line">@RestController</span><br><span class="line">@RequestMapping("/router")</span><br><span class="line">public class TestController {</span><br><span class="line"></span><br><span class="line"> private static Logger logger = LoggerFactory.getLogger(TestController.class);</span><br><span class="line"></span><br><span class="line"> // 计数器</span><br><span class="line"> private static AtomicInteger count = new AtomicInteger(1);</span><br><span class="line"></span><br><span class="line"> @ApiOperation(value = "代扣结果查询")</span><br><span class="line"> @PostMapping("/queryTransRec")</span><br><span class="line"> Resp<List<TransRecDto>> queryTransRec(@RequestBody Req<TransRecQueryReqDto> transRecQueryReqDtoReq) throws InterruptedException {</span><br><span class="line"> System.out.println(String.format("查询支付结果......计数： %s", count.getAndAdd(1)));</span><br><span class="line"> Thread.sleep(500);</span><br><span class="line"> return Resp.success(RespStatus.SUCCESS.getDesc(), null);</span><br><span class="line"> }</span><br></pre></td></tr></table></figure><ul><li>这个类的作用，就是一个服务提供方，计数并返回结果。</li></ul><h4 id="下面我们看一下几种错误的配置。"><a href="#下面我们看一下几种错误的配置。" class="headerlink" title="下面我们看一下几种错误的配置。"></a>下面我们看一下几种错误的配置。</h4><h5 id="案例一（将核心线程数调低，最大队列数调大一点，但是队列拒绝阈值设置小一点）："><a href="#案例一（将核心线程数调低，最大队列数调大一点，但是队列拒绝阈值设置小一点）：" class="headerlink" title="案例一（将核心线程数调低，最大队列数调大一点，但是队列拒绝阈值设置小一点）："></a>案例一（将核心线程数调低，最大队列数调大一点，但是队列拒绝阈值设置小一点）：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">hystrix:</span><br><span class="line"> threadpool:</span><br><span class="line"> default:</span><br><span class="line"> coreSize: 10</span><br><span class="line"> maxQueueSize: 1000</span><br><span class="line"> queueSizeRejectionThreshold: 20</span><br></pre></td></tr></table></figure><h5 id="此时的结果："><a href="#此时的结果：" class="headerlink" title="此时的结果："></a>此时的结果：</h5><p><img src="http://img.seifon.cn/9e409db67dea471ca06a4eff76febbe6.png" alt="image"></p><ul><li>左窗口是B服务方，右窗口是A调用方。从结果可以看出，调用135次，成功32次左右，其余线程全部抛异常。</li></ul><h5 id="案例二（将核心线程数调低，最大队列数调小一点，但是队列拒绝阈值设置大一点）："><a href="#案例二（将核心线程数调低，最大队列数调小一点，但是队列拒绝阈值设置大一点）：" class="headerlink" title="案例二（将核心线程数调低，最大队列数调小一点，但是队列拒绝阈值设置大一点）："></a>案例二（将核心线程数调低，最大队列数调小一点，但是队列拒绝阈值设置大一点）：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">hystrix:</span><br><span class="line"> threadpool:</span><br><span class="line"> default:</span><br><span class="line"> coreSize: 10</span><br><span class="line"> maxQueueSize: 15</span><br><span class="line"> queueSizeRejectionThreshold: 2000</span><br></pre></td></tr></table></figure><h5 id="此时的结果：-1"><a href="#此时的结果：-1" class="headerlink" title="此时的结果："></a>此时的结果：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@7d6d472b rejected from java.util.concurrent.ThreadPoolExecutor@17f8bcb7[Running, pool size = 3, active threads = 3, queued tasks = 15, completed tasks = 0]</span><br></pre></td></tr></table></figure><p><img src="http://img.seifon.cn/f7505a5a5c6b9516379328820c4c9a83.png" alt="image"></p><ul><li>左窗口是B服务方，右窗口是A调用方。从结果可以看出，调用135次，成功25次左右，其余线程全部抛异常。。</li></ul><h5 id="案例三（将核心线程数调低，最大队列数调大一点，但是队列拒绝阈值不设置值）："><a href="#案例三（将核心线程数调低，最大队列数调大一点，但是队列拒绝阈值不设置值）：" class="headerlink" title="案例三（将核心线程数调低，最大队列数调大一点，但是队列拒绝阈值不设置值）："></a>案例三（将核心线程数调低，最大队列数调大一点，但是队列拒绝阈值不设置值）：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">hystrix:</span><br><span class="line"> threadpool:</span><br><span class="line"> default:</span><br><span class="line"> coreSize: 10</span><br><span class="line"> maxQueueSize: 1500</span><br></pre></td></tr></table></figure><h5 id="此时的结果：-2"><a href="#此时的结果：-2" class="headerlink" title="此时的结果："></a>此时的结果：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">java.util.concurrent.RejectedExecutionException: Rejected command because thread-pool queueSize is at rejection threshold.</span><br></pre></td></tr></table></figure><p><img src="http://img.seifon.cn/161b9260d86c712f90b6a026184b2508.png" alt="image"></p><ul><li>左窗口是B服务方，右窗口是A调用方。此时的结果和案例一的情况一样，调用135次，成功47次左右，其余线程全部抛异常。报错跟案例一一样</li></ul><h5 id="案例四（将核心线程数调低，最大队列数不设值，但是队列拒绝阈值设置的比较大）："><a href="#案例四（将核心线程数调低，最大队列数不设值，但是队列拒绝阈值设置的比较大）：" class="headerlink" title="案例四（将核心线程数调低，最大队列数不设值，但是队列拒绝阈值设置的比较大）："></a>案例四（将核心线程数调低，最大队列数不设值，但是队列拒绝阈值设置的比较大）：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">hystrix:</span><br><span class="line"> threadpool:</span><br><span class="line"> default:</span><br><span class="line"> coreSize: 10</span><br><span class="line"> queueSizeRejectionThreshold: 1000</span><br></pre></td></tr></table></figure><h5 id="此时的结果：-3"><a href="#此时的结果：-3" class="headerlink" title="此时的结果："></a>此时的结果：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.FutureTask@23d268ea rejected from java.util.concurrent.ThreadPoolExecutor@66d0e2f4[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]</span><br><span class="line">at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2063)</span><br><span class="line">at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:830)</span><br><span class="line">at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1379)</span><br><span class="line">at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)</span><br></pre></td></tr></table></figure><p><img src="http://img.seifon.cn/6353ad99b3e0af79bcc6753f7c915eab.png" alt="image"></p><ul><li>左窗口是B服务方，右窗口是A调用方。此时的结果和案例二的情况一样，调用135次，成功10次左右，其余线程全部抛异常。报错跟案例二一样</li></ul><h4 id="下面来看一看正确的配置案例"><a href="#下面来看一看正确的配置案例" class="headerlink" title="下面来看一看正确的配置案例"></a>下面来看一看正确的配置案例</h4><h5 id="案例一：将核心线程数调低，最大队列数和队列拒绝阈值的值都设置大一点）："><a href="#案例一：将核心线程数调低，最大队列数和队列拒绝阈值的值都设置大一点）：" class="headerlink" title="案例一：将核心线程数调低，最大队列数和队列拒绝阈值的值都设置大一点）："></a>案例一：将核心线程数调低，最大队列数和队列拒绝阈值的值都设置大一点）：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">hystrix:</span><br><span class="line"> threadpool:</span><br><span class="line"> default:</span><br><span class="line"> coreSize: 10</span><br><span class="line"> maxQueueSize: 1500</span><br><span class="line"> queueSizeRejectionThreshold: 1000</span><br></pre></td></tr></table></figure><h5 id="此时的结果：-4"><a href="#此时的结果：-4" class="headerlink" title="此时的结果："></a>此时的结果：</h5><p><img src="http://img.seifon.cn/a372d90344c968f5ef1631ae13453e6d.png" alt="image"></p><ul><li>左窗口是B服务方，右窗口是A调用方。此时的结果就完全正常了，并发请求了135次，全部成功！</li></ul><h5 id="结论：官方默认队列阈值只有5个，-如果要调整队列，必须同时修改maxQueueSize和queueSizeRejectionThreshold属性的值，否则都会出现异常！"><a href="#结论：官方默认队列阈值只有5个，-如果要调整队列，必须同时修改maxQueueSize和queueSizeRejectionThreshold属性的值，否则都会出现异常！" class="headerlink" title="结论：官方默认队列阈值只有5个， 如果要调整队列，必须同时修改maxQueueSize和queueSizeRejectionThreshold属性的值，否则都会出现异常！"></a>结论：官方默认队列阈值只有5个， 如果要调整队列，必须同时修改maxQueueSize和queueSizeRejectionThreshold属性的值，否则都会出现异常！</h5><h5 id="参考文档："><a href="#参考文档：" class="headerlink" title="参考文档："></a>参考文档：</h5><p><a href="https://github.com/Netflix/Hystrix/wiki/Configuration#coreSize" target="_blank" rel="noopener">Spring Hystrix 官方文档</a></p>]]></content>
<summary type="html">
<h4 id="背景："><a href="#背景：" class="headerlink" title="背景："></a>背景：</h4><p>有一次在生产环境，突然出现了很多笔还款单被挂起，后来排查原因，发现是内部系统调用时出现了Hystrix调用异常。在开发过程中，因为核
</summary>
<category term="Spring" scheme="http://www.seifon.cn/categories/Spring/"/>
<category term="Hystrix" scheme="http://www.seifon.cn/tags/Hystrix/"/>
<category term="Spring Cloud" scheme="http://www.seifon.cn/tags/Spring-Cloud/"/>
<category term="多线程" scheme="http://www.seifon.cn/tags/%E5%A4%9A%E7%BA%BF%E7%A8%8B/"/>
</entry>
<entry>
<title>Spring统一返回Json工具类，带分页信息</title>
<link href="http://www.seifon.cn/2018/04/30/Spring%E7%BB%9F%E4%B8%80%E8%BF%94%E5%9B%9EJson%E5%B7%A5%E5%85%B7%E7%B1%BB%EF%BC%8C%E5%B8%A6%E5%88%86%E9%A1%B5%E4%BF%A1%E6%81%AF/"/>
<id>http://www.seifon.cn/2018/04/30/Spring统一返回Json工具类，带分页信息/</id>
<published>2018-04-30T12:37:00.000Z</published>
<updated>2019-06-16T16:01:02.210Z</updated>
<content type="html"><![CDATA[<p><img src="//ww1.sinaimg.cn/large/005zWjpngy1fqv13ul9pcj30m80d30ts.jpg" alt=""></p><h4 id="前言："><a href="#前言：" class="headerlink" title="前言："></a>前言：</h4><ul><li><p>项目做前后端分离时，我们会经常提供Json数据给前端，如果有一个统一的Json格式返回工具类，那么将大大提高开发效率和减低沟通成本。</p></li><li><p>此Json响应工具类，支持带分页信息，支持泛型，支持HttpStatus标准返回码</p></li></ul><h4 id="效果预览："><a href="#效果预览：" class="headerlink" title="效果预览："></a>效果预览：</h4><p><img src="//ww1.sinaimg.cn/large/005zWjpngy1fquzhh5zkvj30a60gs75a.jpg" alt=""></p><h4 id="步入正题："><a href="#步入正题：" class="headerlink" title="步入正题："></a>步入正题：</h4><h5 id="1-Resp工具类"><a href="#1-Resp工具类" class="headerlink" title="1. Resp工具类"></a>1. Resp工具类</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span 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class="line">241</span><br><span class="line">242</span><br><span class="line">243</span><br><span class="line">244</span><br><span class="line">245</span><br><span class="line">246</span><br><span class="line">247</span><br><span class="line">248</span><br><span class="line">249</span><br></pre></td><td class="code"><pre><span class="line">import java.io.Serializable;</span><br><span class="line">import java.util.Map;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: XiongFeng</span><br><span class="line"> * @Description: Restful统一Json响应对象封装</span><br><span class="line"> * @Date: Created in 9:39 2018/4/10</span><br><span class="line"> */</span><br><span class="line">public class Resp<T> implements Serializable {</span><br><span class="line"> private static final long serialVersionUID = 1L;</span><br><span class="line"></span><br><span class="line"> private final static String SUCCESS_CODE = "200";</span><br><span class="line"></span><br><span class="line"> /**</span><br><span class="line"> * 返回状态码</span><br><span class="line"> */</span><br><span class="line"> private String status;</span><br><span class="line"></span><br><span class="line"> /**</span><br><span class="line"> * 返回消息</span><br><span class="line"> */</span><br><span class="line"> private String message;</span><br><span class="line"></span><br><span class="line"> /**</span><br><span class="line"> * 返回内容</span><br><span class="line"> */</span><br><span class="line"> private T data;</span><br><span class="line"></span><br><span class="line"> /**</span><br><span class="line"> * 分页信息</span><br><span class="line"> */</span><br><span class="line"> private PageInfo page;</span><br><span class="line"></span><br><span class="line"> /**</span><br><span class="line"> * 其他内容</span><br><span class="line"> */</span><br><span class="line"> private Map<String, Object> ext;</span><br><span class="line"></span><br><span class="line"> public String getStatus() {</span><br><span class="line"> return status;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void setStatus(String status) {</span><br><span class="line"> this.status = status;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public String getMessage() {</span><br><span class="line"> return message;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void setMessage(String message) {</span><br><span class="line"> this.message = message;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public T getData() {</span><br><span class="line"> return data;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void setData(T data) {</span><br><span class="line"> this.data = data;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Map<String, Object> getExt() {</span><br><span class="line"> return ext;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void setExt(Map<String, Object> ext) {</span><br><span class="line"> this.ext = ext;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public PageInfo getPage() {</span><br><span class="line"> return page;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void setPage(PageInfo page) {</span><br><span class="line"> this.page = page;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Resp(){</span><br><span class="line"> this.status = SUCCESS_CODE;</span><br><span class="line"> this.message = "SUCCESS";</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Resp(String status, String message) {</span><br><span class="line"> this.status = status;</span><br><span class="line"> this.message = message;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Resp(String status, String message, T data) {</span><br><span class="line"> this.status = status;</span><br><span class="line"> this.message = message;</span><br><span class="line"> this.data = data;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Resp(String status, String message, T data, Map<String, Object> ext) {</span><br><span class="line"> this.status = status;</span><br><span class="line"> this.message = message;</span><br><span class="line"> this.data = data;</span><br><span class="line"> this.ext = ext;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Resp(String status, String message, T data, PageInfo pageInfo) {</span><br><span class="line"> this.status = status;</span><br><span class="line"> this.message = message;</span><br><span class="line"> this.data = data;</span><br><span class="line"> this.page = pageInfo;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Resp(String status, String message, T data, Map<String, Object> ext, PageInfo pageInfo) {</span><br><span class="line"> this.status = status;</span><br><span class="line"> this.message = message;</span><br><span class="line"> this.data = data;</span><br><span class="line"> this.ext = ext;</span><br><span class="line"> this.page = pageInfo;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Resp(String status, String message, T data, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> this.status = status;</span><br><span class="line"> this.message = message;</span><br><span class="line"> this.data = data;</span><br><span class="line"> this.page = pageInfo;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public Resp(String status, String message, T data, Map<String, Object> ext, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> this.status = status;</span><br><span class="line"> this.message = message;</span><br><span class="line"> this.data = data;</span><br><span class="line"> this.ext = ext;</span><br><span class="line"> this.page = pageInfo;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> //快速返回成功</span><br><span class="line"> public static <T>Resp success(){</span><br><span class="line"> return new Resp<T>(SUCCESS_CODE,"请求成功",null);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp success(T result){</span><br><span class="line"> return new Resp<T>(SUCCESS_CODE,"请求成功",result);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp success(String message, T result){</span><br><span class="line"> return new Resp<T>(SUCCESS_CODE,message,result);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp success(String message, T result, Map<String, Object> extra){</span><br><span class="line"> return new Resp<T>(SUCCESS_CODE,message,result, extra);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp success(T result, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> return new Resp<T>(SUCCESS_CODE,"请求成功",result, pageInfo);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp success(T result, Map<String, Object> extra, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> return new Resp<T>(SUCCESS_CODE,"请求成功",result, extra,pageInfo);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp success(String message, T result, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> return new Resp<T>(SUCCESS_CODE,message,result,pageInfo);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp success(String message, T result, Map<String, Object> extra, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> return new Resp<T>(SUCCESS_CODE,message,result, extra,pageInfo);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> //快速返回失败状态</span><br><span class="line"> public static <T>Resp fail(){</span><br><span class="line"> return new Resp<T>(ErrorCode.SYSTEM_ERROR.getCode(),ErrorCode.SYSTEM_ERROR.getMessage());</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp fail(T result){</span><br><span class="line"> return new Resp<T>(ErrorCode.SYSTEM_ERROR.getCode(),ErrorCode.SYSTEM_ERROR.getMessage(),result);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public <T>Resp fail(String message, T result){</span><br><span class="line"> return new Resp<T>(ErrorCode.SYSTEM_ERROR.getCode(),message,result);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public <T>Resp fail(String message, T result, Map<String, Object> extra){</span><br><span class="line"> return new Resp<T>(ErrorCode.SYSTEM_ERROR.getCode(),message,result, extra);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp fail(ErrorCode errorCode){</span><br><span class="line"> return new Resp<T>(errorCode.getCode(),errorCode.getMessage());</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp fail(ErrorCode errorCode, T result){</span><br><span class="line"> return new Resp<T>(errorCode.getCode(),errorCode.getMessage(),result);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp fail(ErrorCode errorCode, String message, T result){</span><br><span class="line"> return new Resp<T>(errorCode.getCode(),message,result);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp fail(ErrorCode errorCode, String message, T result, Map<String, Object> extra){</span><br><span class="line"> return new Resp<T>(errorCode.getCode(),message,result, extra);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> //快速返回自定义状态码</span><br><span class="line"> public static <T>Resp result(String statusCode, String message){</span><br><span class="line"> return new Resp<T>(statusCode,message);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp result(String statusCode, String message, T result){</span><br><span class="line"> return new Resp<T>(statusCode,message,result);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp result(String statusCode, String message, T result, Map<String, Object> extra){</span><br><span class="line"> return new Resp<T>(statusCode,message,result, extra);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp result(String statusCode, String message, T result, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> return new Resp<T>(statusCode,message,result, pageInfo);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp result(String statusCode, String message, T result, Map<String, Object> extra, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> return new Resp<T>(statusCode,message,result, extra,pageInfo);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> //快速返回Http状态</span><br><span class="line"> public static <T>Resp httpStatus(HttpStatus httpStatus, String message){</span><br><span class="line"> return result(httpStatus.toString(),message);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp httpStatus(HttpStatus httpStatus, String message, T result){</span><br><span class="line"> return result(httpStatus.toString(),message,result);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp httpStatus(HttpStatus httpStatus, String message, T result, Map<String, Object> extra){</span><br><span class="line"> return result(httpStatus.toString(),message,result, extra);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp httpStatus(HttpStatus httpStatus, String message, T result, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> return result(httpStatus.toString(),message,result, total, pageNo, pageSize);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static <T>Resp httpStatus(HttpStatus httpStatus, String message, T result, Map<String, Object> extra, Long total, Integer pageNo, Integer pageSize){</span><br><span class="line"> PageInfo pageInfo = new PageInfo(total, pageNo, pageSize);</span><br><span class="line"> return result(httpStatus.toString(),message,result, extra, total, pageNo, pageSize);</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="2-PageInfo-用于封装分页信息的"><a href="#2-PageInfo-用于封装分页信息的" class="headerlink" title="2. PageInfo 用于封装分页信息的"></a>2. PageInfo 用于封装分页信息的</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br></pre></td><td class="code"><pre><span class="line">import java.io.Serializable;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: XiongFeng</span><br><span class="line"> * @Description: 分页信息</span><br><span class="line"> * @Date: Created in 9:39 2018/4/10</span><br><span class="line"> */</span><br><span class="line">public class PageInfo implements Serializable{</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">private static final long serialVersionUID = 1L;</span><br><span class="line">/**</span><br><span class="line"> * 总记录数</span><br><span class="line"> */</span><br><span class="line">private Long total;</span><br><span class="line">/**</span><br><span class="line"> * 总页数</span><br><span class="line"> */</span><br><span class="line">private Long totalPages;</span><br><span class="line">/**</span><br><span class="line"> * 当前页</span><br><span class="line"> */</span><br><span class="line">private Integer pageNo;</span><br><span class="line">/**</span><br><span class="line"> * 页记录数</span><br><span class="line"> */</span><br><span class="line">private Integer pageSize;</span><br><span class="line"></span><br><span class="line">public PageInfo(Long total) {</span><br><span class="line">this.total = total;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public PageInfo(Long total, Integer pageNo,</span><br><span class="line"> Integer pageSize) {</span><br><span class="line">this.total = total;</span><br><span class="line">this.totalPages = (total - 1) / pageSize + 1;</span><br><span class="line">this.pageNo = pageNo;</span><br><span class="line">this.pageSize = pageSize;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public static PageInfo page(Long total) {</span><br><span class="line">return new PageInfo(total);</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public static PageInfo page( Long total, Integer pageNo,</span><br><span class="line"> Integer pageSize) {</span><br><span class="line">return new PageInfo(total, pageNo, pageSize);</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public Long getTotal() {</span><br><span class="line">return total;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public void setTotal(Long total) {</span><br><span class="line">this.total = total;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public Long getTotalPages() {</span><br><span class="line">return totalPages;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public void setTotalPages(Long totalPages) {</span><br><span class="line">this.totalPages = totalPages;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public Integer getPageNo() {</span><br><span class="line">return pageNo;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public void setPageNo(Integer pageNo) {</span><br><span class="line">this.pageNo = pageNo;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public Integer getPageSize() {</span><br><span class="line">return pageSize;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public void setPageSize(Integer pageSize) {</span><br><span class="line">this.pageSize = pageSize;</span><br><span class="line">}</span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="4-ErrorCode-用于定义错误码"><a href="#4-ErrorCode-用于定义错误码" class="headerlink" title="4. ErrorCode 用于定义错误码"></a>4. ErrorCode 用于定义错误码</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br></pre></td><td class="code"><pre><span class="line">/**</span><br><span class="line"> * @Author: XiongFeng</span><br><span class="line"> * @Description: 错误码</span><br><span class="line"> * @Date: Created in 9:39 2018/4/10</span><br><span class="line"> */</span><br><span class="line">public enum ErrorCode {</span><br><span class="line"></span><br><span class="line">SYSTEM_ERROR(500, "系统错误"),</span><br><span class="line">PARAMETER_CHECK_ERROR(400, "参数校验错误"),</span><br><span class="line"> AUTH_VALID_ERROR(701, "用户权限不足"),</span><br><span class="line"> UNLOGIN_ERROR(401, "用户未登录或登录状态超时失效"),</span><br><span class="line"> ;</span><br><span class="line"></span><br><span class="line"> private final Integer value;</span><br><span class="line"> private final String message;</span><br><span class="line"></span><br><span class="line"> ErrorCode(int value, String message) {</span><br><span class="line"> this.value = value;</span><br><span class="line"> this.message = message;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public int getValue() {</span><br><span class="line"> return value;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public String getMessage() {</span><br><span class="line"> return message;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> @Override</span><br><span class="line"> public String toString() {</span><br><span class="line"> return value.toString();</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public String getCode() {</span><br><span class="line"> return value.toString();</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public static ErrorCode getByCode(Integer value) {</span><br><span class="line"> for (ErrorCode _enum : values()) {</span><br><span class="line"> if (_enum.getValue() == value) {</span><br><span class="line"> return _enum;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> return null;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="5-HttpStatus-提取自org-springframework-http-可以自己引入"><a href="#5-HttpStatus-提取自org-springframework-http-可以自己引入" class="headerlink" title="5. HttpStatus 提取自org.springframework.http,可以自己引入"></a>5. HttpStatus 提取自org.springframework.http,可以自己引入</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br><span class="line">131</span><br><span class="line">132</span><br><span class="line">133</span><br><span class="line">134</span><br><span class="line">135</span><br><span class="line">136</span><br><span class="line">137</span><br><span class="line">138</span><br><span class="line">139</span><br><span class="line">140</span><br><span class="line">141</span><br><span class="line">142</span><br><span class="line">143</span><br><span class="line">144</span><br><span class="line">145</span><br><span class="line">146</span><br><span class="line">147</span><br><span class="line">148</span><br><span class="line">149</span><br><span class="line">150</span><br><span class="line">151</span><br><span class="line">152</span><br><span class="line">153</span><br><span class="line">154</span><br><span class="line">155</span><br><span class="line">156</span><br><span class="line">157</span><br><span class="line">158</span><br><span class="line">159</span><br><span class="line">160</span><br><span class="line">161</span><br><span class="line">162</span><br><span class="line">163</span><br><span class="line">164</span><br><span class="line">165</span><br><span class="line">166</span><br><span class="line">167</span><br><span class="line">168</span><br><span class="line">169</span><br><span class="line">170</span><br><span class="line">171</span><br><span class="line">172</span><br><span class="line">173</span><br><span class="line">174</span><br><span class="line">175</span><br><span class="line">176</span><br><span class="line">177</span><br><span class="line">178</span><br><span class="line">179</span><br><span class="line">180</span><br><span class="line">181</span><br><span class="line">182</span><br><span class="line">183</span><br><span class="line">184</span><br><span class="line">185</span><br><span class="line">186</span><br><span class="line">187</span><br><span class="line">188</span><br><span class="line">189</span><br><span class="line">190</span><br><span class="line">191</span><br><span class="line">192</span><br><span class="line">193</span><br><span class="line">194</span><br><span class="line">195</span><br><span class="line">196</span><br><span class="line">197</span><br><span class="line">198</span><br><span class="line">199</span><br><span class="line">200</span><br><span class="line">201</span><br><span class="line">202</span><br><span class="line">203</span><br><span class="line">204</span><br><span class="line">205</span><br><span class="line">206</span><br><span class="line">207</span><br><span class="line">208</span><br><span class="line">209</span><br><span class="line">210</span><br><span class="line">211</span><br><span class="line">212</span><br><span class="line">213</span><br><span class="line">214</span><br><span class="line">215</span><br><span class="line">216</span><br><span class="line">217</span><br><span class="line">218</span><br><span class="line">219</span><br><span class="line">220</span><br><span class="line">221</span><br><span class="line">222</span><br><span class="line">223</span><br><span class="line">224</span><br><span class="line">225</span><br><span class="line">226</span><br><span class="line">227</span><br><span class="line">228</span><br><span class="line">229</span><br><span class="line">230</span><br><span class="line">231</span><br><span class="line">232</span><br><span class="line">233</span><br><span class="line">234</span><br><span class="line">235</span><br><span class="line">236</span><br><span class="line">237</span><br><span class="line">238</span><br><span class="line">239</span><br><span class="line">240</span><br><span class="line">241</span><br><span class="line">242</span><br><span class="line">243</span><br><span class="line">244</span><br><span class="line">245</span><br><span class="line">246</span><br><span class="line">247</span><br><span class="line">248</span><br><span class="line">249</span><br><span class="line">250</span><br><span class="line">251</span><br><span class="line">252</span><br><span class="line">253</span><br><span class="line">254</span><br><span class="line">255</span><br><span class="line">256</span><br><span class="line">257</span><br><span class="line">258</span><br><span class="line">259</span><br><span class="line">260</span><br><span class="line">261</span><br><span class="line">262</span><br><span class="line">263</span><br><span class="line">264</span><br><span class="line">265</span><br><span class="line">266</span><br><span class="line">267</span><br><span class="line">268</span><br><span class="line">269</span><br><span class="line">270</span><br><span class="line">271</span><br><span class="line">272</span><br><span class="line">273</span><br><span class="line">274</span><br><span class="line">275</span><br><span class="line">276</span><br><span class="line">277</span><br><span class="line">278</span><br><span class="line">279</span><br><span class="line">280</span><br><span class="line">281</span><br><span class="line">282</span><br><span class="line">283</span><br><span class="line">284</span><br><span class="line">285</span><br><span class="line">286</span><br><span class="line">287</span><br><span class="line">288</span><br><span class="line">289</span><br><span class="line">290</span><br><span class="line">291</span><br><span class="line">292</span><br><span class="line">293</span><br><span class="line">294</span><br><span class="line">295</span><br><span class="line">296</span><br><span class="line">297</span><br><span class="line">298</span><br><span class="line">299</span><br><span class="line">300</span><br><span class="line">301</span><br><span class="line">302</span><br><span class="line">303</span><br><span class="line">304</span><br><span class="line">305</span><br><span class="line">306</span><br><span class="line">307</span><br><span class="line">308</span><br><span class="line">309</span><br><span class="line">310</span><br><span class="line">311</span><br><span class="line">312</span><br><span class="line">313</span><br><span class="line">314</span><br><span class="line">315</span><br><span class="line">316</span><br><span class="line">317</span><br><span class="line">318</span><br><span class="line">319</span><br><span class="line">320</span><br><span class="line">321</span><br><span class="line">322</span><br><span class="line">323</span><br><span class="line">324</span><br><span class="line">325</span><br><span class="line">326</span><br><span class="line">327</span><br><span class="line">328</span><br><span class="line">329</span><br><span class="line">330</span><br><span class="line">331</span><br><span class="line">332</span><br><span class="line">333</span><br><span class="line">334</span><br><span class="line">335</span><br><span class="line">336</span><br><span class="line">337</span><br><span class="line">338</span><br><span class="line">339</span><br><span class="line">340</span><br><span class="line">341</span><br><span class="line">342</span><br><span class="line">343</span><br><span class="line">344</span><br><span class="line">345</span><br><span class="line">346</span><br><span class="line">347</span><br><span class="line">348</span><br><span class="line">349</span><br><span class="line">350</span><br><span class="line">351</span><br><span class="line">352</span><br><span class="line">353</span><br><span class="line">354</span><br><span class="line">355</span><br><span class="line">356</span><br><span class="line">357</span><br><span class="line">358</span><br><span class="line">359</span><br><span class="line">360</span><br><span class="line">361</span><br><span class="line">362</span><br><span class="line">363</span><br><span class="line">364</span><br><span class="line">365</span><br><span class="line">366</span><br><span class="line">367</span><br><span class="line">368</span><br><span class="line">369</span><br><span class="line">370</span><br><span class="line">371</span><br><span class="line">372</span><br><span class="line">373</span><br><span class="line">374</span><br><span class="line">375</span><br><span class="line">376</span><br><span class="line">377</span><br><span class="line">378</span><br><span class="line">379</span><br><span class="line">380</span><br><span class="line">381</span><br><span class="line">382</span><br><span class="line">383</span><br><span class="line">384</span><br><span class="line">385</span><br><span class="line">386</span><br><span class="line">387</span><br><span class="line">388</span><br><span class="line">389</span><br><span class="line">390</span><br><span class="line">391</span><br><span class="line">392</span><br><span class="line">393</span><br><span class="line">394</span><br><span class="line">395</span><br><span class="line">396</span><br><span class="line">397</span><br><span class="line">398</span><br><span class="line">399</span><br><span class="line">400</span><br><span class="line">401</span><br><span class="line">402</span><br><span class="line">403</span><br><span class="line">404</span><br><span class="line">405</span><br><span class="line">406</span><br><span class="line">407</span><br><span class="line">408</span><br><span class="line">409</span><br><span class="line">410</span><br><span class="line">411</span><br><span class="line">412</span><br><span class="line">413</span><br><span class="line">414</span><br><span class="line">415</span><br><span class="line">416</span><br><span class="line">417</span><br><span class="line">418</span><br><span class="line">419</span><br><span class="line">420</span><br><span class="line">421</span><br><span class="line">422</span><br><span class="line">423</span><br><span class="line">424</span><br><span class="line">425</span><br><span class="line">426</span><br><span class="line">427</span><br><span class="line">428</span><br><span class="line">429</span><br><span class="line">430</span><br><span class="line">431</span><br><span class="line">432</span><br><span class="line">433</span><br><span class="line">434</span><br><span class="line">435</span><br><span class="line">436</span><br><span class="line">437</span><br><span class="line">438</span><br><span class="line">439</span><br><span class="line">440</span><br><span class="line">441</span><br><span class="line">442</span><br><span class="line">443</span><br><span class="line">444</span><br><span class="line">445</span><br><span class="line">446</span><br><span class="line">447</span><br><span class="line">448</span><br><span class="line">449</span><br><span class="line">450</span><br><span class="line">451</span><br><span class="line">452</span><br><span class="line">453</span><br><span class="line">454</span><br><span class="line">455</span><br><span class="line">456</span><br><span class="line">457</span><br><span class="line">458</span><br><span class="line">459</span><br><span class="line">460</span><br><span class="line">461</span><br><span class="line">462</span><br><span class="line">463</span><br><span class="line">464</span><br><span class="line">465</span><br><span class="line">466</span><br><span class="line">467</span><br><span class="line">468</span><br><span class="line">469</span><br><span class="line">470</span><br><span class="line">471</span><br><span class="line">472</span><br><span class="line">473</span><br><span class="line">474</span><br><span class="line">475</span><br><span class="line">476</span><br><span class="line">477</span><br><span class="line">478</span><br><span class="line">479</span><br><span class="line">480</span><br><span class="line">481</span><br><span class="line">482</span><br><span class="line">483</span><br><span class="line">484</span><br><span class="line">485</span><br><span class="line">486</span><br><span class="line">487</span><br><span class="line">488</span><br><span class="line">489</span><br><span class="line">490</span><br><span class="line">491</span><br><span class="line">492</span><br><span class="line">493</span><br><span class="line">494</span><br><span class="line">495</span><br><span class="line">496</span><br><span class="line">497</span><br><span class="line">498</span><br><span class="line">499</span><br><span class="line">500</span><br><span class="line">501</span><br><span class="line">502</span><br><span class="line">503</span><br><span class="line">504</span><br><span class="line">505</span><br><span class="line">506</span><br><span class="line">507</span><br><span class="line">508</span><br><span class="line">509</span><br><span class="line">510</span><br><span class="line">511</span><br><span class="line">512</span><br><span class="line">513</span><br><span class="line">514</span><br><span class="line">515</span><br><span class="line">516</span><br><span class="line">517</span><br><span class="line">518</span><br><span class="line">519</span><br><span class="line">520</span><br><span class="line">521</span><br><span class="line">522</span><br><span class="line">523</span><br></pre></td><td class="code"><pre><span class="line">/**</span><br><span class="line"> * Enumeration of HTTP status codes.</span><br><span class="line"> *</span><br><span class="line"> * <p>The HTTP status code series can be retrieved via {@link #series()}.</span><br><span class="line"> *</span><br><span class="line"> * @author Arjen Poutsma</span><br><span class="line"> * @author Sebastien Deleuze</span><br><span class="line"> * @author Brian Clozel</span><br><span class="line"> * @since 3.0</span><br><span class="line"> * @see HttpStatus.Series</span><br><span class="line"> * @see <a href="http://www.iana.org/assignments/http-status-codes">HTTP Status Code Registry</a></span><br><span class="line"> * @see <a href="http://en.wikipedia.org/wiki/List_of_HTTP_status_codes">List of HTTP status codes - Wikipedia</a></span><br><span class="line"> */</span><br><span class="line">public enum HttpStatus {</span><br><span class="line"></span><br><span class="line">// 1xx Informational</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * {@code 100 Continue}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.2.1">HTTP/1.1: Semantics and Content, section 6.2.1</a></span><br><span class="line"> */</span><br><span class="line">CONTINUE(100, "Continue"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 101 Switching Protocols}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.2.2">HTTP/1.1: Semantics and Content, section 6.2.2</a></span><br><span class="line"> */</span><br><span class="line">SWITCHING_PROTOCOLS(101, "Switching Protocols"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 102 Processing}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc2518#section-10.1">WebDAV</a></span><br><span class="line"> */</span><br><span class="line">PROCESSING(102, "Processing"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 103 Checkpoint}.</span><br><span class="line"> * @see <a href="http://code.google.com/p/gears/wiki/ResumableHttpRequestsProposal">A proposal for supporting</span><br><span class="line"> * resumable POST/PUT HTTP requests in HTTP/1.0</a></span><br><span class="line"> */</span><br><span class="line">CHECKPOINT(103, "Checkpoint"),</span><br><span class="line"></span><br><span class="line">// 2xx Success</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * {@code 200 OK}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.1">HTTP/1.1: Semantics and Content, section 6.3.1</a></span><br><span class="line"> */</span><br><span class="line">OK(200, "OK"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 201 Created}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.2">HTTP/1.1: Semantics and Content, section 6.3.2</a></span><br><span class="line"> */</span><br><span class="line">CREATED(201, "Created"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 202 Accepted}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.3">HTTP/1.1: Semantics and Content, section 6.3.3</a></span><br><span class="line"> */</span><br><span class="line">ACCEPTED(202, "Accepted"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 203 Non-Authoritative Information}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.4">HTTP/1.1: Semantics and Content, section 6.3.4</a></span><br><span class="line"> */</span><br><span class="line">NON_AUTHORITATIVE_INFORMATION(203, "Non-Authoritative Information"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 204 No Content}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.5">HTTP/1.1: Semantics and Content, section 6.3.5</a></span><br><span class="line"> */</span><br><span class="line">NO_CONTENT(204, "No Content"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 205 Reset Content}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.6">HTTP/1.1: Semantics and Content, section 6.3.6</a></span><br><span class="line"> */</span><br><span class="line">RESET_CONTENT(205, "Reset Content"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 206 Partial Content}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7233#section-4.1">HTTP/1.1: Range Requests, section 4.1</a></span><br><span class="line"> */</span><br><span class="line">PARTIAL_CONTENT(206, "Partial Content"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 207 Multi-Status}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc4918#section-13">WebDAV</a></span><br><span class="line"> */</span><br><span class="line">MULTI_STATUS(207, "Multi-Status"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 208 Already Reported}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc5842#section-7.1">WebDAV Binding Extensions</a></span><br><span class="line"> */</span><br><span class="line">ALREADY_REPORTED(208, "Already Reported"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 226 IM Used}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc3229#section-10.4.1">Delta encoding in HTTP</a></span><br><span class="line"> */</span><br><span class="line">IM_USED(226, "IM Used"),</span><br><span class="line"></span><br><span class="line">// 3xx Redirection</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * {@code 300 Multiple Choices}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.1">HTTP/1.1: Semantics and Content, section 6.4.1</a></span><br><span class="line"> */</span><br><span class="line">MULTIPLE_CHOICES(300, "Multiple Choices"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 301 Moved Permanently}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.2">HTTP/1.1: Semantics and Content, section 6.4.2</a></span><br><span class="line"> */</span><br><span class="line">MOVED_PERMANENTLY(301, "Moved Permanently"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 302 Found}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.3">HTTP/1.1: Semantics and Content, section 6.4.3</a></span><br><span class="line"> */</span><br><span class="line">FOUND(302, "Found"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 302 Moved Temporarily}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc1945#section-9.3">HTTP/1.0, section 9.3</a></span><br><span class="line"> * @deprecated in favor of {@link #FOUND} which will be returned from {@code HttpStatus.valueOf(302)}</span><br><span class="line"> */</span><br><span class="line">@Deprecated</span><br><span class="line">MOVED_TEMPORARILY(302, "Moved Temporarily"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 303 See Other}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.4">HTTP/1.1: Semantics and Content, section 6.4.4</a></span><br><span class="line"> */</span><br><span class="line">SEE_OTHER(303, "See Other"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 304 Not Modified}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7232#section-4.1">HTTP/1.1: Conditional Requests, section 4.1</a></span><br><span class="line"> */</span><br><span class="line">NOT_MODIFIED(304, "Not Modified"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 305 Use Proxy}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.5">HTTP/1.1: Semantics and Content, section 6.4.5</a></span><br><span class="line"> * @deprecated due to security concerns regarding in-band configuration of a proxy</span><br><span class="line"> */</span><br><span class="line">@Deprecated</span><br><span class="line">USE_PROXY(305, "Use Proxy"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 307 Temporary Redirect}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.7">HTTP/1.1: Semantics and Content, section 6.4.7</a></span><br><span class="line"> */</span><br><span class="line">TEMPORARY_REDIRECT(307, "Temporary Redirect"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 308 Permanent Redirect}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7238">RFC 7238</a></span><br><span class="line"> */</span><br><span class="line">PERMANENT_REDIRECT(308, "Permanent Redirect"),</span><br><span class="line"></span><br><span class="line">// --- 4xx Client Error ---</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * {@code 400 Bad Request}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.1">HTTP/1.1: Semantics and Content, section 6.5.1</a></span><br><span class="line"> */</span><br><span class="line">BAD_REQUEST(400, "Bad Request"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 401 Unauthorized}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7235#section-3.1">HTTP/1.1: Authentication, section 3.1</a></span><br><span class="line"> */</span><br><span class="line">UNAUTHORIZED(401, "Unauthorized"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 402 Payment Required}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.2">HTTP/1.1: Semantics and Content, section 6.5.2</a></span><br><span class="line"> */</span><br><span class="line">PAYMENT_REQUIRED(402, "Payment Required"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 403 Forbidden}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.3">HTTP/1.1: Semantics and Content, section 6.5.3</a></span><br><span class="line"> */</span><br><span class="line">FORBIDDEN(403, "Forbidden"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 404 Not Found}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.4">HTTP/1.1: Semantics and Content, section 6.5.4</a></span><br><span class="line"> */</span><br><span class="line">NOT_FOUND(404, "Not Found"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 405 Method Not Allowed}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.5">HTTP/1.1: Semantics and Content, section 6.5.5</a></span><br><span class="line"> */</span><br><span class="line">METHOD_NOT_ALLOWED(405, "Method Not Allowed"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 406 Not Acceptable}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.6">HTTP/1.1: Semantics and Content, section 6.5.6</a></span><br><span class="line"> */</span><br><span class="line">NOT_ACCEPTABLE(406, "Not Acceptable"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 407 Proxy Authentication Required}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7235#section-3.2">HTTP/1.1: Authentication, section 3.2</a></span><br><span class="line"> */</span><br><span class="line">PROXY_AUTHENTICATION_REQUIRED(407, "Proxy Authentication Required"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 408 Request Timeout}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.7">HTTP/1.1: Semantics and Content, section 6.5.7</a></span><br><span class="line"> */</span><br><span class="line">REQUEST_TIMEOUT(408, "Request Timeout"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 409 Conflict}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.8">HTTP/1.1: Semantics and Content, section 6.5.8</a></span><br><span class="line"> */</span><br><span class="line">CONFLICT(409, "Conflict"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 410 Gone}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.9">HTTP/1.1: Semantics and Content, section 6.5.9</a></span><br><span class="line"> */</span><br><span class="line">GONE(410, "Gone"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 411 Length Required}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.10">HTTP/1.1: Semantics and Content, section 6.5.10</a></span><br><span class="line"> */</span><br><span class="line">LENGTH_REQUIRED(411, "Length Required"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 412 Precondition failed}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7232#section-4.2">HTTP/1.1: Conditional Requests, section 4.2</a></span><br><span class="line"> */</span><br><span class="line">PRECONDITION_FAILED(412, "Precondition Failed"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 413 Payload Too Large}.</span><br><span class="line"> * @since 4.1</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.11">HTTP/1.1: Semantics and Content, section 6.5.11</a></span><br><span class="line"> */</span><br><span class="line">PAYLOAD_TOO_LARGE(413, "Payload Too Large"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 413 Request Entity Too Large}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc2616#section-10.4.14">HTTP/1.1, section 10.4.14</a></span><br><span class="line"> * @deprecated in favor of {@link #PAYLOAD_TOO_LARGE} which will be returned from {@code HttpStatus.valueOf(413)}</span><br><span class="line"> */</span><br><span class="line">@Deprecated</span><br><span class="line">REQUEST_ENTITY_TOO_LARGE(413, "Request Entity Too Large"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 414 URI Too Long}.</span><br><span class="line"> * @since 4.1</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.12">HTTP/1.1: Semantics and Content, section 6.5.12</a></span><br><span class="line"> */</span><br><span class="line">URI_TOO_LONG(414, "URI Too Long"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 414 Request-URI Too Long}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc2616#section-10.4.15">HTTP/1.1, section 10.4.15</a></span><br><span class="line"> * @deprecated in favor of {@link #URI_TOO_LONG} which will be returned from {@code HttpStatus.valueOf(414)}</span><br><span class="line"> */</span><br><span class="line">@Deprecated</span><br><span class="line">REQUEST_URI_TOO_LONG(414, "Request-URI Too Long"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 415 Unsupported Media Type}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.13">HTTP/1.1: Semantics and Content, section 6.5.13</a></span><br><span class="line"> */</span><br><span class="line">UNSUPPORTED_MEDIA_TYPE(415, "Unsupported Media Type"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 416 Requested Range Not Satisfiable}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7233#section-4.4">HTTP/1.1: Range Requests, section 4.4</a></span><br><span class="line"> */</span><br><span class="line">REQUESTED_RANGE_NOT_SATISFIABLE(416, "Requested range not satisfiable"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 417 Expectation Failed}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.14">HTTP/1.1: Semantics and Content, section 6.5.14</a></span><br><span class="line"> */</span><br><span class="line">EXPECTATION_FAILED(417, "Expectation Failed"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 418 I'm a teapot}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc2324#section-2.3.2">HTCPCP/1.0</a></span><br><span class="line"> */</span><br><span class="line">I_AM_A_TEAPOT(418, "I'm a teapot"),</span><br><span class="line">/**</span><br><span class="line"> * @deprecated See <a href="http://tools.ietf.org/rfcdiff?difftype=--hwdiff&url2=draft-ietf-webdav-protocol-06.txt">WebDAV Draft Changes</a></span><br><span class="line"> */</span><br><span class="line">@Deprecated</span><br><span class="line">INSUFFICIENT_SPACE_ON_RESOURCE(419, "Insufficient Space On Resource"),</span><br><span class="line">/**</span><br><span class="line"> * @deprecated See <a href="http://tools.ietf.org/rfcdiff?difftype=--hwdiff&url2=draft-ietf-webdav-protocol-06.txt">WebDAV Draft Changes</a></span><br><span class="line"> */</span><br><span class="line">@Deprecated</span><br><span class="line">METHOD_FAILURE(420, "Method Failure"),</span><br><span class="line">/**</span><br><span class="line"> * @deprecated See <a href="http://tools.ietf.org/rfcdiff?difftype=--hwdiff&url2=draft-ietf-webdav-protocol-06.txt">WebDAV Draft Changes</a></span><br><span class="line"> */</span><br><span class="line">@Deprecated</span><br><span class="line">DESTINATION_LOCKED(421, "Destination Locked"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 422 Unprocessable Entity}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc4918#section-11.2">WebDAV</a></span><br><span class="line"> */</span><br><span class="line">UNPROCESSABLE_ENTITY(422, "Unprocessable Entity"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 423 Locked}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc4918#section-11.3">WebDAV</a></span><br><span class="line"> */</span><br><span class="line">LOCKED(423, "Locked"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 424 Failed Dependency}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc4918#section-11.4">WebDAV</a></span><br><span class="line"> */</span><br><span class="line">FAILED_DEPENDENCY(424, "Failed Dependency"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 426 Upgrade Required}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc2817#section-6">Upgrading to TLS Within HTTP/1.1</a></span><br><span class="line"> */</span><br><span class="line">UPGRADE_REQUIRED(426, "Upgrade Required"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 428 Precondition Required}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc6585#section-3">Additional HTTP Status Codes</a></span><br><span class="line"> */</span><br><span class="line">PRECONDITION_REQUIRED(428, "Precondition Required"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 429 Too Many Requests}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc6585#section-4">Additional HTTP Status Codes</a></span><br><span class="line"> */</span><br><span class="line">TOO_MANY_REQUESTS(429, "Too Many Requests"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 431 Request Header Fields Too Large}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc6585#section-5">Additional HTTP Status Codes</a></span><br><span class="line"> */</span><br><span class="line">REQUEST_HEADER_FIELDS_TOO_LARGE(431, "Request Header Fields Too Large"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 451 Unavailable For Legal Reasons}.</span><br><span class="line"> * @see <a href="https://tools.ietf.org/html/draft-ietf-httpbis-legally-restricted-status-04"></span><br><span class="line"> * An HTTP Status Code to Report Legal Obstacles</a></span><br><span class="line"> * @since 4.3</span><br><span class="line"> */</span><br><span class="line">UNAVAILABLE_FOR_LEGAL_REASONS(451, "Unavailable For Legal Reasons"),</span><br><span class="line"></span><br><span class="line">// --- 5xx Server Error ---</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * {@code 500 Internal Server Error}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.1">HTTP/1.1: Semantics and Content, section 6.6.1</a></span><br><span class="line"> */</span><br><span class="line">INTERNAL_SERVER_ERROR(500, "Internal Server Error"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 501 Not Implemented}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.2">HTTP/1.1: Semantics and Content, section 6.6.2</a></span><br><span class="line"> */</span><br><span class="line">NOT_IMPLEMENTED(501, "Not Implemented"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 502 Bad Gateway}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.3">HTTP/1.1: Semantics and Content, section 6.6.3</a></span><br><span class="line"> */</span><br><span class="line">BAD_GATEWAY(502, "Bad Gateway"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 503 Service Unavailable}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.4">HTTP/1.1: Semantics and Content, section 6.6.4</a></span><br><span class="line"> */</span><br><span class="line">SERVICE_UNAVAILABLE(503, "Service Unavailable"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 504 Gateway Timeout}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.5">HTTP/1.1: Semantics and Content, section 6.6.5</a></span><br><span class="line"> */</span><br><span class="line">GATEWAY_TIMEOUT(504, "Gateway Timeout"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 505 HTTP Version Not Supported}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.6">HTTP/1.1: Semantics and Content, section 6.6.6</a></span><br><span class="line"> */</span><br><span class="line">HTTP_VERSION_NOT_SUPPORTED(505, "HTTP Version not supported"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 506 Variant Also Negotiates}</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc2295#section-8.1">Transparent Content Negotiation</a></span><br><span class="line"> */</span><br><span class="line">VARIANT_ALSO_NEGOTIATES(506, "Variant Also Negotiates"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 507 Insufficient Storage}</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc4918#section-11.5">WebDAV</a></span><br><span class="line"> */</span><br><span class="line">INSUFFICIENT_STORAGE(507, "Insufficient Storage"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 508 Loop Detected}</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc5842#section-7.2">WebDAV Binding Extensions</a></span><br><span class="line"> */</span><br><span class="line">LOOP_DETECTED(508, "Loop Detected"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 509 Bandwidth Limit Exceeded}</span><br><span class="line"> */</span><br><span class="line">BANDWIDTH_LIMIT_EXCEEDED(509, "Bandwidth Limit Exceeded"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 510 Not Extended}</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc2774#section-7">HTTP Extension Framework</a></span><br><span class="line"> */</span><br><span class="line">NOT_EXTENDED(510, "Not Extended"),</span><br><span class="line">/**</span><br><span class="line"> * {@code 511 Network Authentication Required}.</span><br><span class="line"> * @see <a href="http://tools.ietf.org/html/rfc6585#section-6">Additional HTTP Status Codes</a></span><br><span class="line"> */</span><br><span class="line">NETWORK_AUTHENTICATION_REQUIRED(511, "Network Authentication Required");</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">private final int value;</span><br><span class="line"></span><br><span class="line">private final String reasonPhrase;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">HttpStatus(int value, String reasonPhrase) {</span><br><span class="line">this.value = value;</span><br><span class="line">this.reasonPhrase = reasonPhrase;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Return the integer value of this status code.</span><br><span class="line"> */</span><br><span class="line">public int value() {</span><br><span class="line">return this.value;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Return the reason phrase of this status code.</span><br><span class="line"> */</span><br><span class="line">public String getReasonPhrase() {</span><br><span class="line">return this.reasonPhrase;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Whether this status code is in the HTTP series</span><br><span class="line"> * {@link org.springframework.http.HttpStatus.Series#INFORMATIONAL}.</span><br><span class="line"> * This is a shortcut for checking the value of {@link #series()}.</span><br><span class="line"> */</span><br><span class="line">public boolean is1xxInformational() {</span><br><span class="line">return Series.INFORMATIONAL.equals(series());</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Whether this status code is in the HTTP series</span><br><span class="line"> * {@link org.springframework.http.HttpStatus.Series#SUCCESSFUL}.</span><br><span class="line"> * This is a shortcut for checking the value of {@link #series()}.</span><br><span class="line"> */</span><br><span class="line">public boolean is2xxSuccessful() {</span><br><span class="line">return Series.SUCCESSFUL.equals(series());</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Whether this status code is in the HTTP series</span><br><span class="line"> * {@link org.springframework.http.HttpStatus.Series#REDIRECTION}.</span><br><span class="line"> * This is a shortcut for checking the value of {@link #series()}.</span><br><span class="line"> */</span><br><span class="line">public boolean is3xxRedirection() {</span><br><span class="line">return Series.REDIRECTION.equals(series());</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Whether this status code is in the HTTP series</span><br><span class="line"> * {@link org.springframework.http.HttpStatus.Series#CLIENT_ERROR}.</span><br><span class="line"> * This is a shortcut for checking the value of {@link #series()}.</span><br><span class="line"> */</span><br><span class="line">public boolean is4xxClientError() {</span><br><span class="line">return Series.CLIENT_ERROR.equals(series());</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Whether this status code is in the HTTP series</span><br><span class="line"> * {@link org.springframework.http.HttpStatus.Series#SERVER_ERROR}.</span><br><span class="line"> * This is a shortcut for checking the value of {@link #series()}.</span><br><span class="line"> */</span><br><span class="line">public boolean is5xxServerError() {</span><br><span class="line">return Series.SERVER_ERROR.equals(series());</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Returns the HTTP status series of this status code.</span><br><span class="line"> * @see HttpStatus.Series</span><br><span class="line"> */</span><br><span class="line">public Series series() {</span><br><span class="line">return Series.valueOf(this);</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Return a string representation of this status code.</span><br><span class="line"> */</span><br><span class="line">@Override</span><br><span class="line">public String toString() {</span><br><span class="line">return Integer.toString(this.value);</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Return the enum constant of this type with the specified numeric value.</span><br><span class="line"> * @param statusCode the numeric value of the enum to be returned</span><br><span class="line"> * @return the enum constant with the specified numeric value</span><br><span class="line"> * @throws IllegalArgumentException if this enum has no constant for the specified numeric value</span><br><span class="line"> */</span><br><span class="line">public static HttpStatus valueOf(int statusCode) {</span><br><span class="line">for (HttpStatus status : values()) {</span><br><span class="line">if (status.value == statusCode) {</span><br><span class="line">return status;</span><br><span class="line">}</span><br><span class="line">}</span><br><span class="line">throw new IllegalArgumentException("No matching constant for [" + statusCode + "]");</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Enumeration of HTTP status series.</span><br><span class="line"> * <p>Retrievable via {@link HttpStatus#series()}.</span><br><span class="line"> */</span><br><span class="line">public enum Series {</span><br><span class="line"></span><br><span class="line">INFORMATIONAL(1),</span><br><span class="line">SUCCESSFUL(2),</span><br><span class="line">REDIRECTION(3),</span><br><span class="line">CLIENT_ERROR(4),</span><br><span class="line">SERVER_ERROR(5);</span><br><span class="line"></span><br><span class="line">private final int value;</span><br><span class="line"></span><br><span class="line">Series(int value) {</span><br><span class="line">this.value = value;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * Return the integer value of this status series. Ranges from 1 to 5.</span><br><span class="line"> */</span><br><span class="line">public int value() {</span><br><span class="line">return this.value;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public static Series valueOf(int status) {</span><br><span class="line">int seriesCode = status / 100;</span><br><span class="line">for (Series series : values()) {</span><br><span class="line">if (series.value == seriesCode) {</span><br><span class="line">return series;</span><br><span class="line">}</span><br><span class="line">}</span><br><span class="line">throw new IllegalArgumentException("No matching constant for [" + status + "]");</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">public static Series valueOf(HttpStatus status) {</span><br><span class="line">return valueOf(status.value);</span><br><span class="line">}</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="6-测试示例："><a href="#6-测试示例：" class="headerlink" title="6. 测试示例："></a>6. 测试示例：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line">@ResponseBody</span><br><span class="line">@RequestMapping("/json")</span><br><span class="line">public Resp json(String token) {</span><br><span class="line"> MemberDetails member = memberService.getMemberDetailsByToken(token);</span><br><span class="line"> return Resp.success(member, 5L, 1, 3); //这里分页信息，请自己从PageHelper返回的数据中得到。参看下面注释内容：</span><br><span class="line"></span><br><span class="line"> //Page<Object> page = PageHelper.startPage(1, 5);</span><br><span class="line"> //MemberDetails member = memberService.getMemberDetailsByToken(token);</span><br><span class="line"> //return Resp.success(member, page.getTotal(), page.getPageNum(), page.getPageSize());</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">@ResponseBody</span><br><span class="line">@RequestMapping("/json2")</span><br><span class="line">public Resp json2(String token) {</span><br><span class="line"> MemberDetails member = memberService.getMemberDetailsByToken(token);</span><br><span class="line"> Map<String, Object> ext = new HashMap<>();</span><br><span class="line"> ext.put("msg", "扩展内容");</span><br><span class="line"> return Resp.success("成功了", member, ext, 5L, 1, 3);</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">@ResponseBody</span><br><span class="line">@RequestMapping("/json3")</span><br><span class="line">public Resp json3(String token) {</span><br><span class="line"> MemberDetails member = memberService.getMemberDetailsByToken(token);</span><br><span class="line"> return Resp.fail();</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">@ResponseBody</span><br><span class="line">@RequestMapping("/json4")</span><br><span class="line">public Resp json4(String token) {</span><br><span class="line"> MemberDetails member = memberService.getMemberDetailsByToken(token);</span><br><span class="line"> Map<String, Object> ext = new HashMap<>();</span><br><span class="line"> ext.put("msg", "扩展内容");</span><br><span class="line"> return Resp.result("201", "成功了", member);</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">@ResponseBody</span><br><span class="line">@RequestMapping("/json5")</span><br><span class="line">public Resp json5(String token) {</span><br><span class="line"> MemberDetails member = memberService.getMemberDetailsByToken(token);</span><br><span class="line"> return Resp.success(member);</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">@ResponseBody</span><br><span class="line">@RequestMapping("/json6")</span><br><span class="line">public Resp json6(String token) {</span><br><span class="line"> MemberDetails member = memberService.getMemberDetailsByToken(token);</span><br><span class="line"> return Resp.httpStatus(HttpStatus.ACCEPTED, "成功了");</span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="7-运行结果："><a href="#7-运行结果：" class="headerlink" title="7. 运行结果："></a>7. 运行结果：</h5><ul><li>访问：<a href="http://127.0.0.1:1230/json?token=123" target="_blank" rel="noopener">http://127.0.0.1:1230/json?token=123</a><br><img src="//ww1.sinaimg.cn/large/005zWjpngy1fquzhh5zkvj30a60gs75a.jpg" alt=""></li></ul><ul><li>访问：<a href="http://127.0.0.1:1230/json2?token=123" target="_blank" rel="noopener">http://127.0.0.1:1230/json2?token=123</a><br><img src="//ww1.sinaimg.cn/large/005zWjpngy1fqv06wcr61j30ap0f0wff.jpg" alt=""></li></ul><ul><li>访问：<a href="http://127.0.0.1:1230/json3?token=123" target="_blank" rel="noopener">http://127.0.0.1:1230/json3?token=123</a><br><img src="//ww1.sinaimg.cn/large/005zWjpngy1fqv08porc5j306l04sq30.jpg" alt=""></li></ul><ul><li>访问：<a href="http://127.0.0.1:1230/json4?token=123" target="_blank" rel="noopener">http://127.0.0.1:1230/json4?token=123</a><br><img src="//ww1.sinaimg.cn/large/005zWjpngy1fqv09vwl72j309q0baq3m.jpg" alt=""></li></ul><ul><li>访问：<a href="http://127.0.0.1:1230/json5?token=123" target="_blank" rel="noopener">http://127.0.0.1:1230/json5?token=123</a><br><img src="//ww1.sinaimg.cn/large/005zWjpngy1fqv0est94pj30970b974z.jpg" alt=""></li></ul><ul><li>访问：<a href="http://127.0.0.1:1230/json6?token=123" target="_blank" rel="noopener">http://127.0.0.1:1230/json6?token=123</a><br><img src="//ww1.sinaimg.cn/large/005zWjpngy1fqv0furfcgj305z04agln.jpg" alt=""></li></ul><blockquote><p>更多用法，请查看Resp类里面的静态方法</p></blockquote><h4 id="后记："><a href="#后记：" class="headerlink" title="后记："></a>后记：</h4><ul><li>如果大家有更好的改进建议或代码，欢迎在评论留言反馈，谢谢！</li></ul>]]></content>
<summary type="html">
<p><img src="//ww1.sinaimg.cn/large/005zWjpngy1fqv13ul9pcj30m80d30ts.jpg" alt=""></p>
<h4 id="前言："><a href="#前言：" class="headerlink" title="
</summary>
<category term="Restful" scheme="http://www.seifon.cn/categories/Restful/"/>
<category term="Rest" scheme="http://www.seifon.cn/tags/Rest/"/>
<category term="Json" scheme="http://www.seifon.cn/tags/Json/"/>
<category term="Util" scheme="http://www.seifon.cn/tags/Util/"/>
</entry>
<entry>
<title>利用Filter和Spring拦截器，将用户信息动态传入Request方法</title>
<link href="http://www.seifon.cn/2018/04/21/%E5%88%A9%E7%94%A8Filter%E5%92%8C%E6%8B%A6%E6%88%AA%E5%99%A8%EF%BC%8C%E5%B0%86%E7%94%A8%E6%88%B7%E4%BF%A1%E6%81%AF%E5%8A%A8%E6%80%81%E4%BC%A0%E5%85%A5Request%E6%96%B9%E6%B3%95/"/>
<id>http://www.seifon.cn/2018/04/21/利用Filter和拦截器，将用户信息动态传入Request方法/</id>
<published>2018-04-21T12:14:00.000Z</published>
<updated>2019-06-16T16:01:02.197Z</updated>
<content type="html"><![CDATA[<h4 id="前言："><a href="#前言：" class="headerlink" title="前言："></a>前言：</h4><ul><li>在开发当中，经常会验证用户登录状态和获取用户信息。如果每次都手动调用用户信息查询接口，会非常的繁琐，而且代码冗余。为了提高开发效率，因此就有了今天这篇文章。</li></ul><h4 id="思路："><a href="#思路：" class="headerlink" title="思路："></a>思路：</h4><ul><li>用户请求我们的方法会携带一个Token，通过Filter过滤器将会员信息查出来并放到request请求参数中。接着在Cotroller层的请求方法中接收一个MemberDeatails类型的参数，就能直接获得会员信息了。</li></ul><h4 id="详细步骤："><a href="#详细步骤：" class="headerlink" title="详细步骤："></a>详细步骤：</h4><h5 id="1-Gradle引入需要的Jar包："><a href="#1-Gradle引入需要的Jar包：" class="headerlink" title="1. Gradle引入需要的Jar包："></a>1. Gradle引入需要的Jar包：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">compile "com.fasterxml.jackson.core:jackson-databind:2.8.10"</span><br></pre></td></tr></table></figure><h5 id="2-定义一个Login注解"><a href="#2-定义一个Login注解" class="headerlink" title="2. 定义一个Login注解"></a>2. 定义一个Login注解</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">@Target({ElementType.METHOD})</span><br><span class="line">@Retention(RetentionPolicy.RUNTIME)</span><br><span class="line">@Documented</span><br><span class="line">public @interface Login {</span><br><span class="line"></span><br><span class="line"> String value() default "";</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="3-定义一个MemberDetails-class，用于封装用户信息"><a href="#3-定义一个MemberDetails-class，用于封装用户信息" class="headerlink" title="3. 定义一个MemberDetails.class，用于封装用户信息"></a>3. 定义一个MemberDetails.class，用于封装用户信息</h5><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">MemberDetails</span> </span>{</span><br><span class="line"></span><br><span class="line"> <span class="keyword">private</span> String memberId;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">private</span> String memberName;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">private</span> String memberNickname;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">private</span> String memberPhone;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">private</span> String memberEmail;</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="5-定义一个会员接口类"><a href="#5-定义一个会员接口类" class="headerlink" title="5. 定义一个会员接口类"></a>5. 定义一个会员接口类</h5><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Author</span>: XiongFeng</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Description</span>: 会员接口</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Date</span>: Created in 19:40 2018/4/10</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">interface</span> <span class="title">MemberService</span> </span>{</span><br><span class="line"></span><br><span class="line"><span class="comment">/** 根据TokenId获取用户信息 */</span></span><br><span class="line"> <span class="function">MemberDto <span class="title">getMemberByToken</span><span class="params">(String token)</span></span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="6-定义一个会员接口实现类，在里面写上用户信息获取方法"><a href="#6-定义一个会员接口实现类，在里面写上用户信息获取方法" class="headerlink" title="6. 定义一个会员接口实现类，在里面写上用户信息获取方法"></a>6. 定义一个会员接口实现类，在里面写上用户信息获取方法</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line">@Service</span><br><span class="line">public class MemberServiceImpl implements MemberService {</span><br><span class="line"></span><br><span class="line"> @Override</span><br><span class="line"> public MemberDetails getMemberDetailsByToken(String token) {</span><br><span class="line"> if (StringUtils.isBlank(token)) return null;</span><br><span class="line"> if (!"123".equals(token)) return null;</span><br><span class="line"> MemberDetails memberDetails = new MemberDetails();</span><br><span class="line"> memberDetails.setMemberId("123");</span><br><span class="line"> memberDetails.setMemberName("哈哈123");</span><br><span class="line"> memberDetails.setMemberEmail("[email protected]");</span><br><span class="line"> memberDetails.setMemberNickname("Seifon");</span><br><span class="line"> memberDetails.setMemberPhone("13100001111");</span><br><span class="line"> return memberDetails;</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="7-定义一个Request请求包装类"><a href="#7-定义一个Request请求包装类" class="headerlink" title="7. 定义一个Request请求包装类"></a>7. 定义一个Request请求包装类</h5><ul><li>通过继承HttpServletRequestWrapper类，重写它里面的多个方法，对前端传过来的参数进行重新封装。因为在Filter，虽然可以通过request.getParameterMap()拿到一个含有参数的map，但是不能直接对request里面东西进行修改操作，一旦重新修改，就会报错。后来我发现j2ee已经给我们提供了解决的办法，使用HttpServletRequestWrapper类来解决向request添加额外参数的功能。于是我对HttpServletRequest进行重新包装，在里面重新定义一个map，将以前的参数put进去，并将我们需要添加的参数放进去，达到我们想要的效果。</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br></pre></td><td class="code"><pre><span class="line">import javax.servlet.http.HttpServletRequest;</span><br><span class="line">import javax.servlet.http.HttpServletRequestWrapper;</span><br><span class="line">import java.util.Enumeration;</span><br><span class="line">import java.util.HashMap;</span><br><span class="line">import java.util.Map;</span><br><span class="line">import java.util.Vector;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: XiongFeng</span><br><span class="line"> * @Description: 对Request请求重新包装</span><br><span class="line"> * @Date: Created in 11:17 2018/4/13</span><br><span class="line"> */</span><br><span class="line">public class ParameterRequestWrapper extends HttpServletRequestWrapper {</span><br><span class="line"></span><br><span class="line"> private Map<String , String[]> params = new HashMap<String, String[]>();</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"> @SuppressWarnings("unchecked")</span><br><span class="line"> public ParameterRequestWrapper(HttpServletRequest request) {</span><br><span class="line"> // 将request交给父类，以便于调用对应方法的时候，将其输出，其实父亲类的实现方式和第一种new的方式类似</span><br><span class="line"> super(request);</span><br><span class="line"> //将参数表，赋予给当前的Map以便于持有request中的参数</span><br><span class="line"> this.params.putAll(request.getParameterMap());</span><br><span class="line"> }</span><br><span class="line"> //重载一个构造方法</span><br><span class="line"> public ParameterRequestWrapper(HttpServletRequest request , Map<String , Object> extendParams) {</span><br><span class="line"> this(request);</span><br><span class="line"> addAllParameters(extendParams);//这里将扩展参数写入参数表</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> /**</span><br><span class="line"> * 复写获取key的方法</span><br><span class="line"> */</span><br><span class="line"> @Override</span><br><span class="line"> public Enumeration getParameterNames() {</span><br><span class="line"> Vector names = new Vector(params.keySet());</span><br><span class="line"> return names.elements();</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> /**</span><br><span class="line"> * 复写获取值value的方法</span><br><span class="line"> */</span><br><span class="line"> @Override</span><br><span class="line"> public String getParameter(String name) {</span><br><span class="line"> Object v = params.get(name);</span><br><span class="line"> if (v == null) {</span><br><span class="line"> return null;</span><br><span class="line"> } else if (v instanceof String[]) {</span><br><span class="line"> String[] strArr = (String[]) v;</span><br><span class="line"> if (strArr.length > 0) {</span><br><span class="line"> return strArr[0];</span><br><span class="line"> } else {</span><br><span class="line"> return null;</span><br><span class="line"> }</span><br><span class="line"> } else if (v instanceof String) {</span><br><span class="line"> return (String) v;</span><br><span class="line"> } else {</span><br><span class="line"> return v.toString();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> @Override</span><br><span class="line"> public String[] getParameterValues(String name) {</span><br><span class="line"> Object v = params.get(name);</span><br><span class="line"> if (v == null) {</span><br><span class="line"> return null;</span><br><span class="line"> } else if (v instanceof String[]) {</span><br><span class="line"> return (String[]) v;</span><br><span class="line"> } else if (v instanceof String) {</span><br><span class="line"> return new String[] { (String) v };</span><br><span class="line"> } else {</span><br><span class="line"> return new String[] { v.toString() };</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> public void addAllParameters(Map<String , Object>otherParams) {//增加多个参数</span><br><span class="line"> for(Map.Entry<String , Object>entry : otherParams.entrySet()) {</span><br><span class="line"> addParameter(entry.getKey() , entry.getValue());</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"> public void addParameter(String name , Object value) {//增加参数</span><br><span class="line"> if(value != null) {</span><br><span class="line"> if(value instanceof String[]) {</span><br><span class="line"> params.put(name , (String[])value);</span><br><span class="line"> }else if(value instanceof String) {</span><br><span class="line"> params.put(name , new String[] {(String)value});</span><br><span class="line"> }else {</span><br><span class="line"> params.put(name , new String[] {String.valueOf(value)});</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> /** 简单封装，请根据需求改进 */</span><br><span class="line"> public void addObject(Object obj) {</span><br><span class="line"> Class<?> clazz = obj.getClass();</span><br><span class="line"> Method[] methods = clazz.getMethods();</span><br><span class="line"> try {</span><br><span class="line"> for (Method method : methods) {</span><br><span class="line"> if (!method.getName().startsWith("get")) {</span><br><span class="line"> continue;</span><br><span class="line"> }</span><br><span class="line"> Object invoke = method.invoke(obj);</span><br><span class="line"> if (invoke == null || "".equals(invoke)) {</span><br><span class="line"> continue;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> String filedName = method.getName().replace("get", "");</span><br><span class="line"> filedName = WordUtils.uncapitalize(filedName);</span><br><span class="line"></span><br><span class="line"> if (invoke instanceof Collection) {</span><br><span class="line"> Collection collections = (Collection) invoke;</span><br><span class="line"> if (collections != null && collections.size() > 0) {</span><br><span class="line"> String[] strings = (String[]) collections.toArray();</span><br><span class="line"> addParameter(filedName, strings);</span><br><span class="line"> return;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> addParameter(filedName, invoke);</span><br><span class="line"> }</span><br><span class="line"> } catch (IllegalAccessException e) {</span><br><span class="line"> e.printStackTrace();</span><br><span class="line"> } catch (InvocationTargetException e) {</span><br><span class="line"> e.printStackTrace();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="8-定义一个过滤器"><a href="#8-定义一个过滤器" class="headerlink" title="8. 定义一个过滤器"></a>8. 定义一个过滤器</h5><ul><li>在这个过滤里面，主要校验Token是否有效以及将会员信息添加到request。首先，从Request请求头中拿到前端传过来的Token，并使用Token调用会员信息获取接口，得到用户的资料，然后将用户信息put到ParameterMap中，这个ParameterMap是我们通过ParameterRequestWrapper重新包装的一个map，因此可以在里面添加会员的参数，然后将新的request传递出去。</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br></pre></td><td class="code"><pre><span class="line">import com.fasterxml.jackson.databind.ObjectMapper;</span><br><span class="line">import org.springframework.stereotype.Component;</span><br><span class="line"></span><br><span class="line">import javax.servlet.*;</span><br><span class="line">import javax.servlet.annotation.WebFilter;</span><br><span class="line">import javax.servlet.http.HttpServletRequest;</span><br><span class="line">import java.io.IOException;</span><br><span class="line">import java.util.Date;</span><br><span class="line">import java.util.HashMap;</span><br><span class="line">import java.util.Map;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: XiongFeng</span><br><span class="line"> * @Description: 会员登录信息过滤器</span><br><span class="line"> * @Date: Created in 11:17 2018/4/13</span><br><span class="line"> */</span><br><span class="line">@Component</span><br><span class="line">@WebFilter(urlPatterns = "/*")</span><br><span class="line">public class MemberFilter implements Filter {</span><br><span class="line"></span><br><span class="line"> MemberService memberService = new MemberServiceImpl();</span><br><span class="line"></span><br><span class="line"> ObjectMapper objectMapper = new ObjectMapper();</span><br><span class="line"></span><br><span class="line"> @Override</span><br><span class="line"> public void init(FilterConfig filterConfig) throws ServletException {</span><br><span class="line"></span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> @Override</span><br><span class="line"> public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {</span><br><span class="line"></span><br><span class="line"> HttpServletRequest req = (HttpServletRequest) request;</span><br><span class="line"></span><br><span class="line"> String tokenId = req.getHeader("X-Authorization");</span><br><span class="line"></span><br><span class="line"> if (tokenId == null || "".equals(tokenId) || tokenId.isEmpty()) {</span><br><span class="line"> chain.doFilter(request, response);</span><br><span class="line"> return;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> MemberDetails memberDetails = memberService.getMemberDetailsByToken(tokenId);</span><br><span class="line"> if (memberDetails == null) this.respFail(response);</span><br><span class="line"></span><br><span class="line"> ParameterRequestWrapper requestWrapper = new ParameterRequestWrapper(req);</span><br><span class="line"> requestWrapper.addObject(memberDetails);</span><br><span class="line"> chain.doFilter(requestWrapper, response);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">/** 返回失败结果Json数据 */</span><br><span class="line"> private void respFail(ServletResponse response) throws IOException {</span><br><span class="line"> Map<String, Object> map = new HashMap<>();</span><br><span class="line"> map.put("status", 500);</span><br><span class="line"> map.put("message", "登录失效，请登录");</span><br><span class="line"> map.put("data", null);</span><br><span class="line"> String s = objectMapper.writeValueAsString(map);</span><br><span class="line"> response.setCharacterEncoding("UTF-8");</span><br><span class="line"> response.setContentType("application/json; charset=utf-8");</span><br><span class="line"> response.getWriter().write(s);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> @Override</span><br><span class="line"> public void destroy() {</span><br><span class="line"></span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="9-定义一个SpringMVC拦截器"><a href="#9-定义一个SpringMVC拦截器" class="headerlink" title="9. 定义一个SpringMVC拦截器"></a>9. 定义一个SpringMVC拦截器</h5><ul><li>在这个拦截器里面，主要验证Controller方法中是否需要MemberDetails和是否标了@Login注解。首先，从HandlerMethod中获取所有入参，看有没有需要MemberDetails参数，如果有，就从HttpServletRequest中拿memberId，如果不存在说明没有登录，存在就通过。然后HandlerMethod获取@Login注解，判断是否存在，如果存在，就看有没有memberId,没有就不通过。</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br></pre></td><td class="code"><pre><span class="line">package cn.seifon.paymodle.interceptor;</span><br><span class="line"></span><br><span class="line">import cn.seifon.paymodle.annotations.Login;</span><br><span class="line">import cn.seifon.paymodle.dto.MemberDetails;</span><br><span class="line">import cn.seifon.paymodle.service.manager.member.MemberService;</span><br><span class="line">import cn.seifon.paymodle.service.manager.member.impl.MemberServiceImpl;</span><br><span class="line">import com.fasterxml.jackson.databind.ObjectMapper;</span><br><span class="line">import org.springframework.core.MethodParameter;</span><br><span class="line">import org.springframework.web.method.HandlerMethod;</span><br><span class="line">import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;</span><br><span class="line"></span><br><span class="line">import javax.servlet.http.HttpServletRequest;</span><br><span class="line">import javax.servlet.http.HttpServletResponse;</span><br><span class="line">import java.lang.reflect.Type;</span><br><span class="line">import java.util.HashMap;</span><br><span class="line">import java.util.Map;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> * @Author: XiongFeng</span><br><span class="line"> * @Description: 会员登录信息拦截器</span><br><span class="line"> * @Date: Created in 11:17 2018/4/13</span><br><span class="line"> */</span><br><span class="line">public class MemberInterceptor extends HandlerInterceptorAdapter {</span><br><span class="line"></span><br><span class="line"> ObjectMapper objectMapper = new ObjectMapper();</span><br><span class="line"></span><br><span class="line"> MemberService memberService = new MemberServiceImpl();</span><br><span class="line"></span><br><span class="line"> public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws IOException {</span><br><span class="line"></span><br><span class="line"> HandlerMethod method = (HandlerMethod) handler;</span><br><span class="line"> String[] memberIds = request.getParameterValues("memberId");</span><br><span class="line"></span><br><span class="line"> MethodParameter[] methodParameters = method.getMethodParameters();</span><br><span class="line"> //判断方法类是否有MemberDetails入参</span><br><span class="line"> if (methodParameters.length > 0) {</span><br><span class="line"> for (MethodParameter methodParameter : methodParameters) {</span><br><span class="line"> Type genericParameterType = methodParameter.getGenericParameterType();</span><br><span class="line"> String typeName = genericParameterType.getTypeName();</span><br><span class="line"> if (!typeName.equals(MemberDetails.class.getTypeName())) continue;</span><br><span class="line"> if (memberIds == null || memberIds.length <= 0) return this.respFail(response); //如果找不到用户信息就返回失败</span><br><span class="line"> break;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> //判断是否有Login注解</span><br><span class="line"> Login login = method.getMethodAnnotation(Login.class);</span><br><span class="line"> if (login == null) return true;</span><br><span class="line"></span><br><span class="line"> if (memberIds == null || memberIds.length <= 0) return this.respFail(response); //如果找不到用户信息就返回失败</span><br><span class="line"> return true;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">/** 返回失败结果Json数据 */</span><br><span class="line"> private boolean respFail(HttpServletResponse response) throws IOException {</span><br><span class="line"> Map<String, Object> map = new HashMap<>();</span><br><span class="line"> map.put("status", 500);</span><br><span class="line"> map.put("message", "登录失效，请登录");</span><br><span class="line"> map.put("data", null);</span><br><span class="line"> String s = objectMapper.writeValueAsString(map);</span><br><span class="line"> response.setCharacterEncoding("UTF-8");</span><br><span class="line"> response.setContentType("application/json; charset=utf-8");</span><br><span class="line"> response.getWriter().write(s);</span><br><span class="line"> return false;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="10-将拦截器注册到WebMvcConfigurer中"><a href="#10-将拦截器注册到WebMvcConfigurer中" class="headerlink" title="10. 将拦截器注册到WebMvcConfigurer中"></a>10. 将拦截器注册到WebMvcConfigurer中</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">@Configuration</span><br><span class="line">public class MyWebAppConfigurer</span><br><span class="line"> extends WebMvcConfigurerAdapter {</span><br><span class="line"></span><br><span class="line"> @Override</span><br><span class="line"> public void addInterceptors(InterceptorRegistry registry) {</span><br><span class="line"> // addPathPatterns 用于添加拦截规则</span><br><span class="line"> registry.addInterceptor(new MemberInterceptor()).addPathPatterns("/**");</span><br><span class="line"> super.addInterceptors(registry);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="11-定义会员Controller"><a href="#11-定义会员Controller" class="headerlink" title="11. 定义会员Controller"></a>11. 定义会员Controller</h5><ul><li>经过一个过滤器和一个拦截器，request请求终于来到了我们Controller层。这时候，我们只需要在方法里面写入MemberDetails memberDetails 就OK了，不用做任何操作，我们就可以获取会员信息了，是不是炒鸡方便！另外还可以在方法上标@Login注解。</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line">@RestController</span><br><span class="line">public class MemberController {</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">@RequestMapping("/token")</span><br><span class="line"> @Login</span><br><span class="line"> public Map<String, Object> getUser(MemberDetails memberDetails) {</span><br><span class="line"> //User user = userManager.selectByPrimaryKey(id);</span><br><span class="line"> Map<String, Object> map = new LinkedHashMap<>();</span><br><span class="line"> map.put("status", 200);</span><br><span class="line"> map.put("message", "请求成功");</span><br><span class="line"> map.put("data", memberDetails);</span><br><span class="line"> return map;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure><p>运行结果：</p><p><img src="//ww1.sinaimg.cn/large/005zWjpngy1fqkm3hli7hj30u60a0abm.jpg" alt="img"></p><p><img src="//ww1.sinaimg.cn/large/005zWjpngy1fqkm5g7xp3j30u10cr76b.jpg" alt="img"></p><h4 id="遇到的坑："><a href="#遇到的坑：" class="headerlink" title="遇到的坑："></a>遇到的坑：</h4><ul><li><p>当时我尝试过把会员参数放到session域中的Attribute，也尝试过在Model里setAttribute。后来发现这是行不通的，在filter中直接使用request.setAttribute()是无效的。放在Modle也是可行，但是Controller里面的方法需要加@ModelAttribute(“…”)才能得到用户信息，很不方便。唯有通过request.getParameterMap() put()进去，才是最方便的。</p></li><li><p>一开始我没想到用过滤器，因此我就尝试在拦截器里，直接通过ParameterRequestWrapper对request包装，后来发现不管我怎么弄都不成功。当时非常绝望，后来想了想会不会是拦截器不支持重新包装request，于是我就通过filter去做，没想到成功了。这时，我想既然用到了filter，那干脆直接在filter里面获取@Login注解和获取方法参数得了，后来发现filter里面拿不到方法的信息，哭。后来想到一个办法，可以通过先filter，后拦截器。于是就成功了！</p></li></ul><h4 id="后记："><a href="#后记：" class="headerlink" title="后记："></a>后记：</h4><ul><li>这篇文章只是记录了我的一点小小经验，如果有什么不对的地方或者有更好的方法，请大家在评论里留言指正！</li></ul><p>参考文章：<a href="http://www.importnew.com/19023.html" target="_blank" rel="noopener">http://www.importnew.com/19023.html</a></p>]]></content>
<summary type="html">
<h4 id="前言："><a href="#前言：" class="headerlink" title="前言："></a>前言：</h4><ul>
<li>在开发当中，经常会验证用户登录状态和获取用户信息。如果每次都手动调用用户信息查询接口，会非常的繁琐，而且代码冗余。为了提
</summary>
<category term="Spring" scheme="http://www.seifon.cn/categories/Spring/"/>
<category term="拦截器" scheme="http://www.seifon.cn/tags/%E6%8B%A6%E6%88%AA%E5%99%A8/"/>
<category term="Filter" scheme="http://www.seifon.cn/tags/Filter/"/>
</entry>
<entry>
<title>Nginx的五种负载算法模式</title>
<link href="http://www.seifon.cn/2017/09/05/Nginx%E7%9A%84%E4%BA%94%E7%A7%8D%E8%B4%9F%E8%BD%BD%E7%AE%97%E6%B3%95%E6%A8%A1%E5%BC%8F/"/>
<id>http://www.seifon.cn/2017/09/05/Nginx的五种负载算法模式/</id>
<published>2017-09-04T17:03:00.000Z</published>
<updated>2018-01-24T15:13:45.000Z</updated>
<content type="html"><![CDATA[<h4 id="1、轮询（默认）"><a href="#1、轮询（默认）" class="headerlink" title="1、轮询（默认）"></a>1、轮询（默认）</h4><p>每个请求按时间顺序逐一分配到不同的后端服务器，如果后端服务器down掉，能自动剔除。 </p><blockquote><p>例如： </p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">upstream bakend { </span><br><span class="line">server 192.168.0.14; </span><br><span class="line">server 192.168.0.15; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><h4 id="2、weight权重"><a href="#2、weight权重" class="headerlink" title="2、weight权重"></a>2、weight权重</h4><p>指定轮询几率，weight和访问比率成正比，用于后端服务器性能不均的情况。 </p><blockquote><p>例如： </p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">upstream bakend { </span><br><span class="line">server 192.168.0.14 weight=10; </span><br><span class="line">server 192.168.0.15 weight=10; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><h4 id="3、ip-hash"><a href="#3、ip-hash" class="headerlink" title="3、ip_hash"></a>3、ip_hash</h4><p>每个请求按访问ip的hash结果分配，这样每个访客固定访问一个后端服务器，可以解决session的问题。 </p><blockquote><p>例如： </p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">upstream bakend { </span><br><span class="line">ip_hash; </span><br><span class="line">server 192.168.0.14:88; </span><br><span class="line">server 192.168.0.15:80; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><h4 id="4、fair（第三方）"><a href="#4、fair（第三方）" class="headerlink" title="4、fair（第三方）"></a>4、fair（第三方）</h4><p>按后端服务器的响应时间来分配请求，响应时间短的优先分配。 </p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">upstream backend { </span><br><span class="line">server server1; </span><br><span class="line">server server2; </span><br><span class="line">fair; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><h4 id="5、url-hash（第三方）"><a href="#5、url-hash（第三方）" class="headerlink" title="5、url_hash（第三方）"></a>5、url_hash（第三方）</h4><p>按访问url的hash结果来分配请求，使每个url定向到同一个后端服务器，后端服务器为缓存时比较有效。 </p><p>例：在upstream中加入hash语句，server语句中不能写入weight等其他的参数，hash_method是使用的hash算法 </p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">upstream backend { </span><br><span class="line">server squid1:3128; </span><br><span class="line">server squid2:3128; </span><br><span class="line">hash $request_uri; </span><br><span class="line">hash_method crc32; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><p>tips: </p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">upstream bakend{#定义负载均衡设备的Ip及设备状态 </span><br><span class="line">ip_hash; </span><br><span class="line">server 127.0.0.1:9090 down; </span><br><span class="line">server 127.0.0.1:8080 weight=2; </span><br><span class="line">server 127.0.0.1:6060; </span><br><span class="line">server 127.0.0.1:7070 backup; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><p>在需要使用负载均衡的server中增加 </p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">proxy_pass http://bakend/;</span><br></pre></td></tr></table></figure><h4 id="每个设备的状态设置为"><a href="#每个设备的状态设置为" class="headerlink" title="每个设备的状态设置为:"></a>每个设备的状态设置为:</h4><ul><li>1.down 表示单前的server暂时不参与负载 </li><li>2.weight 默认为1.weight越大，负载的权重就越大。 </li><li>3.max_fails ：允许请求失败的次数默认为1.当超过最大次数时，返回proxy_next_upstream 模块定义的错误 </li><li>4.fail_timeout:max_fails次失败后，暂停的时间。 </li><li>5.backup： 其它所有的非backup机器down或者忙的时候，请求backup机器。所以这台机器压力会最轻。 </li></ul>]]></content>
<summary type="html">
<h4 id="1、轮询（默认）"><a href="#1、轮询（默认）" class="headerlink" title="1、轮询（默认）"></a>1、轮询（默认）</h4><p>每个请求按时间顺序逐一分配到不同的后端服务器，如果后端服务器down掉，能自动剔除。 </
</summary>
<category term="Nginx" scheme="http://www.seifon.cn/categories/Nginx/"/>
<category term="Nginx" scheme="http://www.seifon.cn/tags/Nginx/"/>
<category term="负载均衡" scheme="http://www.seifon.cn/tags/%E8%B4%9F%E8%BD%BD%E5%9D%87%E8%A1%A1/"/>
</entry>
<entry>
<title>高CPU占用调优</title>
<link href="http://www.seifon.cn/2017/09/05/%E9%AB%98CPU%E5%8D%A0%E7%94%A8%E8%B0%83%E4%BC%98/"/>
<id>http://www.seifon.cn/2017/09/05/高CPU占用调优/</id>
<published>2017-09-04T16:39:00.000Z</published>
<updated>2019-06-16T16:01:02.203Z</updated>
<content type="html"><![CDATA[<h4 id="根据top命令，发现PID为28555的Java进程占用CPU高达200-，出现故障。"><a href="#根据top命令，发现PID为28555的Java进程占用CPU高达200-，出现故障。" class="headerlink" title="根据top命令，发现PID为28555的Java进程占用CPU高达200%，出现故障。"></a>根据top命令，发现PID为28555的Java进程占用CPU高达200%，出现故障。</h4><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fjqjr9mfhxj20nb07k7fy.jpg" alt=""></p><h4 id="通过查看进程"><a href="#通过查看进程" class="headerlink" title="通过查看进程"></a>通过查看进程</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">ps aux | grep PID</span><br></pre></td></tr></table></figure><p>可以进一步确定是tomcat进程出现了问题。</p><p>但是，怎么定位到具体线程或者代码呢？</p><h4 id="首先显示线程列表"><a href="#首先显示线程列表" class="headerlink" title="首先显示线程列表:"></a>首先显示线程列表:</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">ps -mp pid -o THREAD,tid,time</span><br></pre></td></tr></table></figure><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fjqjtoveipj20nb08idrh.jpg" alt=""></p><p>找到了耗时最高的线程28802，占用CPU时间快两个小时了！</p><h4 id="其次将需要的线程ID转换为16进制格式："><a href="#其次将需要的线程ID转换为16进制格式：" class="headerlink" title="其次将需要的线程ID转换为16进制格式："></a>其次将需要的线程ID转换为16进制格式：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">printf "%x\n" tid</span><br></pre></td></tr></table></figure><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fjqjvwb86vj20n804f416.jpg" alt=""></p><h4 id="最后打印线程的堆栈信息："><a href="#最后打印线程的堆栈信息：" class="headerlink" title="最后打印线程的堆栈信息："></a>最后打印线程的堆栈信息：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">jstack pid |grep tid(16进制线程ID) –A60</span><br></pre></td></tr></table></figure><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fjqjviodt2j20o00afncx.jpg" alt=""></p><p>找到有问题的java代码(省略)，进行业务调整和编码修改</p><h4 id="最后，总结下排查CPU故障的方法和技巧有哪些："><a href="#最后，总结下排查CPU故障的方法和技巧有哪些：" class="headerlink" title="最后，总结下排查CPU故障的方法和技巧有哪些："></a>最后，总结下排查CPU故障的方法和技巧有哪些：</h4><ul><li><p>1、top命令：Linux命令。可以查看实时的CPU使用情况。也可以查看最近一段时间的CPU使用情况。</p></li><li><p>2、PS命令：Linux命令。强大的进程状态监控命令。可以查看进程以及进程中线程的当前CPU使用情况。属于当前状态的采样数据。</p></li><li><p>3、jstack：Java提供的命令。可以查看某个进程的当前线程栈运行情况。根据这个命令的输出可以定位某个进程的所有线程的当前运行状态、运行代码，以及是否死锁等等。</p></li></ul>]]></content>
<summary type="html">
<h4 id="根据top命令，发现PID为28555的Java进程占用CPU高达200-，出现故障。"><a href="#根据top命令，发现PID为28555的Java进程占用CPU高达200-，出现故障。" class="headerlink" title="根据top命
</summary>
<category term="JAVA调优" scheme="http://www.seifon.cn/categories/JAVA%E8%B0%83%E4%BC%98/"/>
<category term="调优" scheme="http://www.seifon.cn/tags/%E8%B0%83%E4%BC%98/"/>
<category term="Jstack" scheme="http://www.seifon.cn/tags/Jstack/"/>
<category term="栈" scheme="http://www.seifon.cn/tags/%E6%A0%88/"/>
</entry>
<entry>
<title>开关指定端口，以80为例</title>
<link href="http://www.seifon.cn/2017/07/09/%E5%BC%80%E5%85%B3%E6%8C%87%E5%AE%9A%E7%AB%AF%E5%8F%A3%EF%BC%8C%E4%BB%A580%E4%B8%BA%E4%BE%8B/"/>
<id>http://www.seifon.cn/2017/07/09/开关指定端口，以80为例/</id>
<published>2017-07-09T06:02:54.000Z</published>
<updated>2018-01-24T15:13:45.000Z</updated>
<content type="html"><![CDATA[<h4 id="开启80端口："><a href="#开启80端口：" class="headerlink" title="开启80端口："></a>开启80端口：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">iptables -I INPUT -p tcp --dport 80 -j ACCEPT</span><br></pre></td></tr></table></figure><a id="more"></a><h4 id="关闭80端口："><a href="#关闭80端口：" class="headerlink" title="关闭80端口："></a>关闭80端口：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">iptables -I INPUT -p tcp --dport 80 -j DROP</span><br></pre></td></tr></table></figure><h4 id="保存并重启Iptables："><a href="#保存并重启Iptables：" class="headerlink" title="保存并重启Iptables："></a>保存并重启Iptables：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">/etc/init.d/iptables save</span><br><span class="line">service iptables restart</span><br></pre></td></tr></table></figure>]]></content>
<summary type="html">
<h4 id="开启80端口："><a href="#开启80端口：" class="headerlink" title="开启80端口："></a>开启80端口：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">iptables -I INPUT -p tcp --dport 80 -j ACCEPT</span><br></pre></td></tr></table></figure>
</summary>
<category term="Iptables" scheme="http://www.seifon.cn/categories/Iptables/"/>
<category term="centos" scheme="http://www.seifon.cn/tags/centos/"/>
<category term="linux" scheme="http://www.seifon.cn/tags/linux/"/>
<category term="iptables" scheme="http://www.seifon.cn/tags/iptables/"/>
<category term="防火墙" scheme="http://www.seifon.cn/tags/%E9%98%B2%E7%81%AB%E5%A2%99/"/>
</entry>
<entry>
<title>Jenkins环境搭建</title>
<link href="http://www.seifon.cn/2017/07/08/Jenkins%E7%8E%AF%E5%A2%83%E6%90%AD%E5%BB%BA/"/>
<id>http://www.seifon.cn/2017/07/08/Jenkins环境搭建/</id>
<published>2017-07-07T17:52:00.000Z</published>
<updated>2019-06-16T16:01:02.185Z</updated>
<content type="html"><![CDATA[<h4 id="上传以下的包到-tmp-目录下："><a href="#上传以下的包到-tmp-目录下：" class="headerlink" title="上传以下的包到/tmp/目录下："></a>上传以下的包到/tmp/目录下：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">jdk-8u121-linux-x64.tar.gz</span><br><span class="line">apache-tomcat-7.0.75.tar.gz</span><br><span class="line">apache-maven-3.5.0-bin.tar.gz</span><br><span class="line"></span><br><span class="line">MySQL-client-5.5.52-1.el6.x86_64.rpm</span><br><span class="line">MySQL-devel-5.5.52-1.el6.x86_64.rpm</span><br><span class="line">MySQL-server-5.5.52-1.el6.x86_64.rpm</span><br><span class="line">MySQL-shared-5.5.52-1.el6.x86_64.rpm</span><br><span class="line"></span><br><span class="line">git-2.9.3.tar.gz</span><br><span class="line">jenkins.war</span><br></pre></td></tr></table></figure><h4 id="解压包到-opt-目录下："><a href="#解压包到-opt-目录下：" class="headerlink" title="解压包到/opt/目录下："></a>解压包到/opt/目录下：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">tar -xvzf /tmp/jdk-8u121-linux-x64.tar.gz -C /opt/</span><br><span class="line"></span><br><span class="line">tar -xvzf /tmp/apache-tomcat-7.0.75.tar.gz -C /opt/</span><br><span class="line"></span><br><span class="line">tar -xvzf /tmp/apache-maven-3.5.0-bin.tar.gz -C /opt/</span><br></pre></td></tr></table></figure><h4 id="配置环境变量："><a href="#配置环境变量：" class="headerlink" title="配置环境变量："></a>配置环境变量：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">vim /etc/profile</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">JAVA_HOME=/opt/jdk1.8.0_121</span><br><span class="line">CATALINA_HOME=/opt/apache-tomcat-7.0.75</span><br><span class="line">MAVEN_HOME=/opt/apache-maven-3.5.0</span><br><span class="line"></span><br><span class="line">PATH=/opt/jdk1.8.0_121/bin:/opt/apache-tomcat-7.0.75/bin:/opt/apache-maven-3.5.0/bin:$PATH</span><br><span class="line">CLASSPATH=.:/opt/jdk1.8.0_121/lib/dt.jar:/opt/jdk1.8.0_121/lib/tools.jar</span><br><span class="line">export JAVA_HOME PATH CLASSPATH CATALINA_HOME MAVEN_HOME</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">source /etc/profile</span><br></pre></td></tr></table></figure><hr><h4 id="配置Tomcat自启动："><a href="#配置Tomcat自启动：" class="headerlink" title="配置Tomcat自启动："></a>配置Tomcat自启动：</h4><ul><li>(1)、在/etc/init.d目录下创建文件：tomcat 内容如下：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br></pre></td><td class="code"><pre><span class="line">#!/bin/bash</span><br><span class="line"># This is the init script for starting up the</span><br><span class="line"># Jakarta Tomcat server</span><br><span class="line">#</span><br><span class="line"># chkconfig: 345 91 10</span><br><span class="line"># description: Starts and stops the Tomcat daemon.</span><br><span class="line">#</span><br><span class="line"></span><br><span class="line"># Source function library.</span><br><span class="line">. /etc/rc.d/init.d/functions</span><br><span class="line"></span><br><span class="line"># Get config.</span><br><span class="line">. /etc/sysconfig/network</span><br><span class="line"></span><br><span class="line"># Check that networking is up.</span><br><span class="line">[ "${NETWORKING}" = "no" ] && exit 0</span><br><span class="line"></span><br><span class="line">export JAVA_HOME=/opt/jdk1.8.0_121</span><br><span class="line">export CATALINA_HOME=/opt/apache-tomcat-7.0.75</span><br><span class="line">startup=$CATALINA_HOME/bin/startup.sh</span><br><span class="line">shutdown=$CATALINA_HOME/bin/shutdown.sh</span><br><span class="line"></span><br><span class="line">start(){</span><br><span class="line"> echo -n "Starting Tomcat service:"</span><br><span class="line"> cd $tomcat_home</span><br><span class="line"> $startup</span><br><span class="line"> echo "tomcat is succeessfully started up"</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">stop(){</span><br><span class="line"> echo -n "Shutting down tomcat: "</span><br><span class="line"> cd $tomcat_home</span><br><span class="line"> $shutdown</span><br><span class="line"> echo "tomcat is succeessfully shut down."</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">status(){</span><br><span class="line"> numproc=`ps -ef | grep catalina | grep -v "grep catalina" | wc -l`</span><br><span class="line"> if [ $numproc -gt 0 ]; then</span><br><span class="line"> echo "Tomcat is running..."</span><br><span class="line"> else</span><br><span class="line"> echo "Tomcat is stopped..."</span><br><span class="line"> fi</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line">restart(){</span><br><span class="line"> stop</span><br><span class="line"> start</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"># See how we were called.</span><br><span class="line">case "$1" in</span><br><span class="line">start)</span><br><span class="line"> start</span><br><span class="line"> ;;</span><br><span class="line">stop)</span><br><span class="line"> stop</span><br><span class="line"> ;;</span><br><span class="line">status)</span><br><span class="line"> status</span><br><span class="line"> ;;</span><br><span class="line">restart)</span><br><span class="line"> restart</span><br><span class="line"> ;;</span><br><span class="line">*)</span><br><span class="line"> echo $"Usage: $0 {start|stop|status|restart}"</span><br><span class="line"> exit 1</span><br><span class="line">esac</span><br></pre></td></tr></table></figure><ul><li>(2)、配置权限，并加入自启：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">cd /etc/init.d</span><br><span class="line">chmod 755 ./tomcat</span><br><span class="line">chkconfig --add tomcat</span><br><span class="line">chkconfig tomcat on</span><br></pre></td></tr></table></figure><ul><li>(3)、设置URIEncoding=”UTF-8”</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">vim /opt/apache-tomcat-7.0.75/conf/server.xml</span><br></pre></td></tr></table></figure><ul><li>(4)、给Tomcat设置用户名密码</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">vim /opt/apache-tomcat-7.0.75/conf/tomcat-users.xml</span><br><span class="line"></span><br><span class="line"><role rolename="manager-gui"/></span><br><span class="line"><role rolename="manager-script"/></span><br><span class="line"><role rolename="manager-jmx"/></span><br><span class="line"><role rolename="manager-status"/></span><br><span class="line"><user username="tomcat_user" password="123456" roles="manager-gui,manager-script,manager-jmx,manager-status" /></span><br></pre></td></tr></table></figure><ul><li>(5)、打开/etc/sysconfig/iptables 加入以下代码：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT</span><br></pre></td></tr></table></figure><ul><li>(6)、重启防火墙服务</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">service iptables restart</span><br></pre></td></tr></table></figure><hr><h4 id="安装Mysql服务："><a href="#安装Mysql服务：" class="headerlink" title="安装Mysql服务："></a>安装Mysql服务：</h4><ul><li>安装服务器端</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">rpm -ivh /tmp/MySQL-server-5.5.52-1.el6.x86_64.rpm</span><br><span class="line"></span><br><span class="line">如果出现报错就执行：</span><br><span class="line">rpm -e --nodeps mysql-libs-5.1.73-7.el6.x86_64</span><br></pre></td></tr></table></figure><ul><li>安装客户端</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">rpm -ivh /tmp/MySQL-client-5.5.52-1.el6.x86_64.rpm</span><br></pre></td></tr></table></figure><ul><li>启动MySQL服务</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">service mysql start</span><br></pre></td></tr></table></figure><ul><li>修改MySQL服务器登录密码</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">/usr/bin/mysqladmin -u root password 'root'</span><br></pre></td></tr></table></figure><ul><li>修改防火墙端口：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">vim /etc/sysconfig/iptables</span><br><span class="line"></span><br><span class="line">-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT</span><br><span class="line"></span><br><span class="line">service iptables restart</span><br></pre></td></tr></table></figure><hr><h4 id="修改MySQL服务器访问权限"><a href="#修改MySQL服务器访问权限" class="headerlink" title="修改MySQL服务器访问权限"></a>修改MySQL服务器访问权限</h4><ul><li>第一步：登录MySQL服务器</li><li>第二步：use mysql;</li><li>第三步：查看user表部分内容</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">mysql> select host,user,password from user;</span><br><span class="line">+--------------+------+-------------------------------------------+</span><br><span class="line">| host | user | password |</span><br><span class="line">+--------------+------+-------------------------------------------+</span><br><span class="line">| localhost | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |</span><br><span class="line">| computer0325 | root | |</span><br><span class="line">| 127.0.0.1 | root | |</span><br><span class="line">| ::1 | root | |</span><br><span class="line">| localhost | | |</span><br><span class="line">| computer0325 | | |</span><br><span class="line">+--------------+------+-------------------------------------------+</span><br><span class="line">6 rows in set (0.00 sec)</span><br></pre></td></tr></table></figure><ul><li>第四步：插入特定数据</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">insert into user(host,user,password) values('%','root','*81F5E21E35407D884A6CD4A731AEBFB6AF209E1B');</span><br></pre></td></tr></table></figure><ul><li>第五步：再次查看user表内容</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">mysql> select host,user,password from user;</span><br><span class="line">+--------------+------+-------------------------------------------+</span><br><span class="line">| host | user | password |</span><br><span class="line">+--------------+------+-------------------------------------------+</span><br><span class="line">| localhost | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |</span><br><span class="line">| computer0325 | root | |</span><br><span class="line">| 127.0.0.1 | root | |</span><br><span class="line">| ::1 | root | |</span><br><span class="line">| localhost | | |</span><br><span class="line">| computer0325 | | |</span><br><span class="line">| % | root | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |</span><br><span class="line">+--------------+------+-------------------------------------------+</span><br></pre></td></tr></table></figure><ul><li>第六步：为root@%授权</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;</span><br></pre></td></tr></table></figure><ul><li>第七步：退出MySQL</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">mysql> exit;</span><br></pre></td></tr></table></figure><ul><li>第八步：重启MySQL服务</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">service mysql restart;</span><br></pre></td></tr></table></figure><hr><h4 id="编译安装git"><a href="#编译安装git" class="headerlink" title="编译安装git"></a>编译安装git</h4><ul><li><p>安装依赖：</p><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel</span><br><span class="line"></span><br><span class="line">yum install gcc perl-ExtUtils-MakeMaker</span><br></pre></td></tr></table></figure></li><li><p>删除已有的git：</p></li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">yum remove git</span><br></pre></td></tr></table></figure><ul><li>编译git：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">tar -xvzf ./git-2.9.3.tar.gz -C /opt/</span><br><span class="line">cd /opt/git-2.9.3/</span><br><span class="line">make prefix=/usr/local/git all</span><br><span class="line">make prefix=/usr/local/git install</span><br><span class="line">echo "export PATH=$PATH:/usr/local/git/bin" >> /etc/bashrc</span><br><span class="line">source /etc/bashrc</span><br></pre></td></tr></table></figure><ul><li>检查版本：</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">git --version</span><br></pre></td></tr></table></figure><hr><h4 id="部署Jenkins-war包，以及初始化环境："><a href="#部署Jenkins-war包，以及初始化环境：" class="headerlink" title="部署Jenkins.war包，以及初始化环境："></a>部署Jenkins.war包，以及初始化环境：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">cp /tmp/jenkins.war /opt/apache-tomcat-7.0.75/webapps/</span><br></pre></td></tr></table></figure><ul><li>通过浏览器访问Tomcat下的jenkins应用</li></ul><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">例如：http://[server-address]:8080/jenkins/</span><br></pre></td></tr></table></figure><ul><li>输入内置密钥串</li></ul><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fi82tr5h3aj211t0ieq48.jpg" alt=""></p><ul><li>先不安装插件，后面有需要时再安装，点右上角的×</li></ul><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fi82wdsq6pj211t0iego2.jpg" alt=""></p><ul><li>修改默认管理员密码</li></ul><hr><h4 id="安装GitHub-plugin-和-Deploy-to-container-Plugin-插件"><a href="#安装GitHub-plugin-和-Deploy-to-container-Plugin-插件" class="headerlink" title="安装GitHub plugin 和 Deploy to container Plugin 插件"></a>安装GitHub plugin 和 Deploy to container Plugin 插件</h4><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fi83uloclej205300vjr5.jpg" alt=""></p><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fi83yo3d5pj205r00r0si.jpg" alt=""></p><ul><li>点击系统管理，进入系统设置界面</li></ul><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fi831ouwi2j20hx08naax.jpg" alt=""></p><blockquote><p>Configure Global Security</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">①勾选允许用户注册，这样万一我们忘记了之前的账号密码还可以再注册一个</span><br><span class="line">②勾选任何用户可以做任何事(没有任何限制)</span><br><span class="line">③取消防止跨站点请求伪造勾选</span><br></pre></td></tr></table></figure><blockquote><p>Global Tool Configuration</p></blockquote><ul><li>①设置Maven</li></ul><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fi8341ynlxj20qk08tt92.jpg" alt=""></p><ul><li>②设置JDK，不要选自动安装，因为我们自己安装过了</li></ul><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fi83524o09j20qi07j0sr.jpg" alt=""></p><ul><li>③设置MAVEN_HOME，同样不要自动安装</li></ul><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fi835r1x01j20qj07h3yk.jpg" alt=""></p><ul><li>④设置Git：/usr/local/git/bin/git</li></ul><p><img src="http://ww1.sinaimg.cn/large/8e24145egy1fi836rzcysj20qf07oglm.jpg" alt=""></p>]]></content>
<summary type="html">
<h4 id="上传以下的包到-tmp-目录下："><a href="#上传以下的包到-tmp-目录下：" class="headerlink" title="上传以下的包到/tmp/目录下："></a>上传以下的包到/tmp/目录下：</h4><figure class="hi
</summary>
<category term="Jenkins" scheme="http://www.seifon.cn/categories/Jenkins/"/>
<category term="Jenkins" scheme="http://www.seifon.cn/tags/Jenkins/"/>
<category term="CI" scheme="http://www.seifon.cn/tags/CI/"/>
</entry>
<entry>
<title>Yaml语法说明</title>
<link href="http://www.seifon.cn/2017/06/27/Yaml%E8%AF%AD%E6%B3%95%E8%AF%B4%E6%98%8E/"/>
<id>http://www.seifon.cn/2017/06/27/Yaml语法说明/</id>
<published>2017-06-26T17:19:00.000Z</published>
<updated>2018-01-24T15:13:45.000Z</updated>
<content type="html"><![CDATA[<h4 id="简介"><a href="#简介" class="headerlink" title="简介"></a>简介</h4><p>YAML 是专门用来写配置文件的语言，非常简洁和强大，远比 JSON 格式方便。</p><h4 id="语法规则"><a href="#语法规则" class="headerlink" title="语法规则"></a>语法规则</h4><ul><li>大小写敏感</li><li>使用缩进表示层级关系</li><li>缩进时不允许使用Tab键，只允许使用空格。</li><li>缩进的空格数目不重要，只要相同层级的元素左侧对齐即可</li><li>：冒号后面必须有空格</li><li>#表示注释，从这个字符一直到行尾，都会被解析器忽略。</li></ul><h4 id="YAML支持三种数据结构："><a href="#YAML支持三种数据结构：" class="headerlink" title="YAML支持三种数据结构："></a>YAML支持三种数据结构：</h4><ul><li>对象：键值对的集合，又称为映射（mapping）/ 哈希（hashes） / 字典（dictionary）</li><li>数组：一组按次序排列的值，又称为序列（sequence） / 列表（list）</li><li>纯量（scalars）：单个的、不可再分的值</li></ul><hr><h4 id="对象"><a href="#对象" class="headerlink" title="对象"></a>对象</h4><blockquote><p><strong>一、对象的一组键值对，使用冒号结构表示。</strong></p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">animal: pets</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下：</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ animal: 'pets' }</span><br></pre></td></tr></table></figure><hr><blockquote><p><strong>二、将所有键值对写成一个行内对象。</strong></p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">hash: { name: Steve, foo: bar }</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ hash: { name: 'Steve', foo: 'bar' } }</span><br></pre></td></tr></table></figure><h4 id="数组"><a href="#数组" class="headerlink" title="数组"></a>数组</h4><blockquote><p><strong>一、一组连词线开头的行，构成一个数组。</strong></p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">- Cat</span><br><span class="line">- Dog</span><br><span class="line">- Goldfish</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">[ 'Cat', 'Dog', 'Goldfish' ]</span><br></pre></td></tr></table></figure><blockquote><p>数据结构的子成员是一个数组，则可以在该项下面缩进一个空格。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">-</span><br><span class="line"> - Cat</span><br><span class="line"> - Dog</span><br><span class="line"> - Goldfish</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">[ [ 'Cat', 'Dog', 'Goldfish' ] ]</span><br></pre></td></tr></table></figure><hr><blockquote><p><strong>二、数组也可以采用行内表示法。</strong></p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">animal: [Cat, Dog]</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ animal: [ 'Cat', 'Dog' ] }</span><br></pre></td></tr></table></figure><h4 id="复合结构"><a href="#复合结构" class="headerlink" title="复合结构"></a>复合结构</h4><blockquote><p>对象和数组可以结合使用，形成复合结构。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">languages:</span><br><span class="line"> - Ruby</span><br><span class="line"> - Perl</span><br><span class="line"> - Python </span><br><span class="line">websites:</span><br><span class="line"> YAML: yaml.org </span><br><span class="line"> Ruby: ruby-lang.org </span><br><span class="line"> Python: python.org </span><br><span class="line"> Perl: use.perl.org</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下：</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">{ languages: [ 'Ruby', 'Perl', 'Python' ],</span><br><span class="line"> websites: </span><br><span class="line"> { YAML: 'yaml.org',</span><br><span class="line"> Ruby: 'ruby-lang.org',</span><br><span class="line"> Python: 'python.org',</span><br><span class="line"> Perl: 'use.perl.org' } }</span><br></pre></td></tr></table></figure><h4 id="纯量"><a href="#纯量" class="headerlink" title="纯量"></a>纯量</h4><blockquote><p>纯量是最基本的、不可再分的值。以下数据类型都属于 JavaScript 的纯量。</p></blockquote><blockquote><p>字符串<br>布尔值<br>整数<br>浮点数<br>Null<br>时间<br>日期</p></blockquote><hr><blockquote><p>数值直接以字面量的形式表示。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">number: 12.30</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ number: 12.30 }</span><br></pre></td></tr></table></figure><hr><blockquote><p>布尔值用true和false表示。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">isSet: true</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ isSet: true }</span><br></pre></td></tr></table></figure><hr><blockquote><p>null用~表示。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">parent: ~</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ parent: null }</span><br></pre></td></tr></table></figure><hr><blockquote><p>时间采用 ISO8601 格式。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">iso8601: 2001-12-14t21:59:43.10-05:00</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ iso8601: new Date('2001-12-14t21:59:43.10-05:00') }</span><br></pre></td></tr></table></figure><hr><blockquote><p>日期采用复合 iso8601 格式的年、月、日表示。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">date: 1976-07-31</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ date: new Date('1976-07-31') }</span><br></pre></td></tr></table></figure><hr><blockquote><p>YAML 允许使用两个感叹号，强制转换数据类型。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">e: !!str 123</span><br><span class="line">f: !!str true</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ e: '123', f: 'true' }</span><br></pre></td></tr></table></figure><h4 id="字符串"><a href="#字符串" class="headerlink" title="字符串"></a>字符串</h4><blockquote><p>字符串是最常见，也是最复杂的一种数据类型。字符串默认不使用引号表示。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">str: 这是一行字符串</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ str: '这是一行字符串' }</span><br></pre></td></tr></table></figure><hr><blockquote><p>如果字符串之中包含空格或特殊字符，需要放在引号之中。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">str: '内容： 字符串'</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">str: '内容: 字符串'</span><br></pre></td></tr></table></figure><hr><blockquote><p>单引号和双引号都可以使用，双引号不会对特殊字符转义。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">s1: '内容\n字符串'</span><br><span class="line">s2: "内容\n字符串"</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ s1: '内容\\n字符串', s2: '内容\n字符串' }</span><br></pre></td></tr></table></figure><hr><blockquote><p>单引号之中如果还有单引号，必须连续使用两个单引号转义。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">str: 'labor''s day'</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ str: 'labor\'s day' }</span><br></pre></td></tr></table></figure><hr><blockquote><p>字符串可以写成多行，从第二行开始，必须有一个单空格缩进。换行符会被转为空格。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">str: 这是一段</span><br><span class="line"> 多行</span><br><span class="line"> 字符串</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ str: '这是一段 多行 字符串' }</span><br></pre></td></tr></table></figure><hr><blockquote><p>多行字符串可以使用|保留换行符，也可以使用>折叠换行。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">this: |</span><br><span class="line"> Foo</span><br><span class="line"> Bar</span><br><span class="line">that: ></span><br><span class="line"> Foo</span><br><span class="line"> Bar</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 代码如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ this: 'Foo\nBar\n', that: 'Foo Bar\n' }</span><br></pre></td></tr></table></figure><hr><blockquote><p>+表示保留文字块末尾的换行，-表示删除字符串末尾的换行。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">s1: |</span><br><span class="line"> Foo</span><br><span class="line"></span><br><span class="line">s2: |+</span><br><span class="line"> Foo</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">s3: |-</span><br><span class="line"> Foo</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 代码如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">{ s1: 'Foo\n', s2: 'Foo\n\n\n', s3: 'Foo' }</span><br></pre></td></tr></table></figure><hr><blockquote><p>字符串之中可以插入 HTML 标记。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">message: |</span><br><span class="line"></span><br><span class="line"> </span><br><span class="line"> 段落</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">{ message: '\n</span><br><span class="line">\n 段落\n</span><br><span class="line">\n' }</span><br></pre></td></tr></table></figure><h4 id="引用"><a href="#引用" class="headerlink" title="引用"></a>引用</h4><blockquote><p>锚点&和别名*，可以用来引用。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">defaults: &defaults</span><br><span class="line"> adapter: postgres</span><br><span class="line"> host: localhost</span><br><span class="line"></span><br><span class="line">development:</span><br><span class="line"> database: myapp_development</span><br><span class="line"> <<: *defaults</span><br><span class="line"></span><br><span class="line">test:</span><br><span class="line"> database: myapp_test</span><br><span class="line"> <<: *defaults</span><br></pre></td></tr></table></figure><blockquote><p>等同于下面的代码。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">defaults:</span><br><span class="line"> adapter: postgres</span><br><span class="line"> host: localhost</span><br><span class="line"></span><br><span class="line">development:</span><br><span class="line"> database: myapp_development</span><br><span class="line"> adapter: postgres</span><br><span class="line"> host: localhost</span><br><span class="line"></span><br><span class="line">test:</span><br><span class="line"> database: myapp_test</span><br><span class="line"> adapter: postgres</span><br><span class="line"> host: localhost</span><br></pre></td></tr></table></figure><blockquote><p>&用来建立锚点（defaults），<<表示合并到当前数据，*用来引用锚点。</p></blockquote><hr><blockquote><p>下面是另一个例子。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">- &showell Steve </span><br><span class="line">- Clark </span><br><span class="line">- Brian </span><br><span class="line">- Oren </span><br><span class="line">- *showell</span><br></pre></td></tr></table></figure><blockquote><p>转为 JavaScript 代码如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">[ 'Steve', 'Clark', 'Brian', 'Oren', 'Steve' ]</span><br></pre></td></tr></table></figure><h4 id="函数和正则表达式的转换"><a href="#函数和正则表达式的转换" class="headerlink" title="函数和正则表达式的转换"></a>函数和正则表达式的转换</h4><blockquote><p>这是 JS-YAML 库特有的功能，可以把函数和正则表达式转为字符串。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"># example.yml</span><br><span class="line">fn: function () { return 1 }</span><br><span class="line">reg: /test/</span><br></pre></td></tr></table></figure><blockquote><p>解析上面的 yml 文件的代码如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">var yaml = require('js-yaml');</span><br><span class="line">var fs = require('fs');</span><br><span class="line"></span><br><span class="line">try {</span><br><span class="line"> var doc = yaml.load(</span><br><span class="line"> fs.readFileSync('./example.yml', 'utf8')</span><br><span class="line"> );</span><br><span class="line"> console.log(doc);</span><br><span class="line">} catch (e) {</span><br><span class="line"> console.log(e);</span><br><span class="line">}</span><br></pre></td></tr></table></figure><blockquote><p>从 JavaScript 对象还原到 yaml 文件的代码如下。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line">var yaml = require('js-yaml');</span><br><span class="line">var fs = require('fs');</span><br><span class="line"></span><br><span class="line">var obj = {</span><br><span class="line"> fn: function () { return 1 },</span><br><span class="line"> reg: /test/</span><br><span class="line">};</span><br><span class="line"></span><br><span class="line">try {</span><br><span class="line"> fs.writeFileSync(</span><br><span class="line"> './example.yml',</span><br><span class="line"> yaml.dump(obj),</span><br><span class="line"> 'utf8'</span><br><span class="line"> );</span><br><span class="line">} catch (e) {</span><br><span class="line"> console.log(e);</span><br><span class="line">}</span><br></pre></td></tr></table></figure>]]></content>
<summary type="html">
<h4 id="简介"><a href="#简介" class="headerlink" title="简介"></a>简介</h4><p>YAML 是专门用来写配置文件的语言，非常简洁和强大，远比 JSON 格式方便。</p>
<h4 id="语法规则"><a href="#语
</summary>
<category term="Yaml" scheme="http://www.seifon.cn/categories/Yaml/"/>
<category term="Yaml" scheme="http://www.seifon.cn/tags/Yaml/"/>
<category term="yml" scheme="http://www.seifon.cn/tags/yml/"/>
</entry>
<entry>
<title>Mysql异地定时备份方法</title>
<link href="http://www.seifon.cn/2017/05/03/Mysql%E5%BC%82%E5%9C%B0%E5%AE%9A%E6%97%B6%E5%A4%87%E4%BB%BD%E6%96%B9%E6%B3%95/"/>
<id>http://www.seifon.cn/2017/05/03/Mysql异地定时备份方法/</id>
<published>2017-05-02T16:51:00.000Z</published>
<updated>2018-01-24T15:13:45.000Z</updated>
<content type="html"><![CDATA[<h4 id="两台linux服务器："><a href="#两台linux服务器：" class="headerlink" title="两台linux服务器："></a>两台linux服务器：</h4><ul><li>一台199.20.30.222（mysql服务器）</li><li>一台199.20.30.226（与mysql互通的一台server）</li></ul><p>思路：mysql本地做一份备份；226Server做一份同步备份，脚本放在222上面，定时任务也设置在222上面。</p><h5 id="（1）mysql本地备份："><a href="#（1）mysql本地备份：" class="headerlink" title="（1）mysql本地备份："></a>（1）mysql本地备份：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">#!/bin/sh</span><br><span class="line">#mysql_backup</span><br><span class="line">DATE=`date +%Y%m%d`</span><br><span class="line">/opt/mysql/bin/mysqldump --opt jsweb -u root > /opt/mysqlbackup/$DATE.sql</span><br></pre></td></tr></table></figure><h5 id="（2）将本地备份同步到远端226上面："><a href="#（2）将本地备份同步到远端226上面：" class="headerlink" title="（2）将本地备份同步到远端226上面："></a>（2）将本地备份同步到远端226上面：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">#!/bin/bash</span><br><span class="line">#date:2013/09/24</span><br><span class="line">#function:The script is used copying mysqlbackup to 226</span><br><span class="line">DATE=`date +%Y%m%d`</span><br><span class="line">scp /opt/mysqlbackup/$DATE.sql [email protected]:/data/2013backup/mysql/</span><br></pre></td></tr></table></figure><h5 id="（3）222上面设置定时任务："><a href="#（3）222上面设置定时任务：" class="headerlink" title="（3）222上面设置定时任务："></a>（3）222上面设置定时任务：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">vim/etc/crontable OR crontable -e</span><br><span class="line">30 1 * * * /bin/sh /home/jiaoben/backup.sh ===============每天1：30执行</span><br><span class="line">30 3 * * * /bin/sh /home/jiaoben/scp.sh ===============每天3：30执行</span><br></pre></td></tr></table></figure><blockquote><p> 注意：两个linux之间相互拷贝文件，使用scp工具必须输入远端密码,所以在进行（2）时，需要规避输入密码，否则自动备份到remote不会生效,<br> 本人采用的方法：使两个服务器互相信任，执行scp时，就可以免输入密码。</p></blockquote><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">ssh-keygen -t rsa</span><br><span class="line">cd /root/.ssh/</span><br><span class="line">scp id_rsa.pub [email protected]:/root/ssh/</span><br><span class="line">ssh [email protected]</span><br><span class="line">mv /root/.ssh/id_isa_pub /root/.ssh/authorized_key</span><br></pre></td></tr></table></figure><h4 id="时间过长备份的mysql就需要定时清理"><a href="#时间过长备份的mysql就需要定时清理" class="headerlink" title="时间过长备份的mysql就需要定时清理"></a>时间过长备份的mysql就需要定时清理</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">find /opt/mysqlbackup/ -type f -name \*.sql -mtime +10 -exec rm -fr {} \;</span><br><span class="line">find /opt/mysqlbackup/ -type f -name "*.sql" -mtime +10 -exec rm -fr {} \;</span><br></pre></td></tr></table></figure>]]></content>
<summary type="html">
<h4 id="两台linux服务器："><a href="#两台linux服务器：" class="headerlink" title="两台linux服务器："></a>两台linux服务器：</h4><ul>
<li>一台199.20.30.222（mysql服务器）</l
</summary>
<category term="Mysql" scheme="http://www.seifon.cn/categories/Mysql/"/>
<category term="Mysql" scheme="http://www.seifon.cn/tags/Mysql/"/>
<category term="数据库" scheme="http://www.seifon.cn/tags/%E6%95%B0%E6%8D%AE%E5%BA%93/"/>
<category term="备份" scheme="http://www.seifon.cn/tags/%E5%A4%87%E4%BB%BD/"/>
<category term="定时" scheme="http://www.seifon.cn/tags/%E5%AE%9A%E6%97%B6/"/>
<category term="容灾" scheme="http://www.seifon.cn/tags/%E5%AE%B9%E7%81%BE/"/>
</entry>
<entry>
<title>CentOS7防火墙Firewalld配置和使用</title>
<link href="http://www.seifon.cn/2017/05/02/CentOS7%E9%98%B2%E7%81%AB%E5%A2%99Firewalld%E9%85%8D%E7%BD%AE%E5%92%8C%E4%BD%BF%E7%94%A8/"/>
<id>http://www.seifon.cn/2017/05/02/CentOS7防火墙Firewalld配置和使用/</id>
<published>2017-05-02T06:55:00.000Z</published>
<updated>2018-01-24T15:13:45.000Z</updated>
<content type="html"><![CDATA[<h4 id="添加放行端口："><a href="#添加放行端口：" class="headerlink" title="添加放行端口："></a>添加放行端口：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">firewall-cmd --permanent --zone=public --add-port=80/tcp</span><br></pre></td></tr></table></figure><a id="more"></a><h4 id="删除放行端口："><a href="#删除放行端口：" class="headerlink" title="删除放行端口："></a>删除放行端口：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">firewall-cmd --permanent --zone=public --remove-port=80/tcp</span><br></pre></td></tr></table></figure><h4 id="热加载："><a href="#热加载：" class="headerlink" title="热加载："></a>热加载：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">firewall-cmd --reload</span><br></pre></td></tr></table></figure><h5 id="命令含义："><a href="#命令含义：" class="headerlink" title="命令含义："></a>命令含义：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">--zone #作用域</span><br><span class="line"></span><br><span class="line">--add-port=80/tcp #添加端口，格式为：端口/通讯协议</span><br><span class="line"></span><br><span class="line">--permanent #永久生效，没有此参数重启后失效</span><br></pre></td></tr></table></figure><hr><h4 id="查看防火墙配置："><a href="#查看防火墙配置：" class="headerlink" title="查看防火墙配置："></a>查看防火墙配置：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">cat /etc/firewalld/zones/public.xml | less</span><br></pre></td></tr></table></figure><h4 id="查看防火墙状态"><a href="#查看防火墙状态" class="headerlink" title="查看防火墙状态"></a>查看防火墙状态</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">systemctl status firewalld.service</span><br></pre></td></tr></table></figure><h4 id="启动防火墙"><a href="#启动防火墙" class="headerlink" title="启动防火墙"></a>启动防火墙</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">systemctl start firewalld.service</span><br></pre></td></tr></table></figure><h4 id="关闭防火墙"><a href="#关闭防火墙" class="headerlink" title="关闭防火墙"></a>关闭防火墙</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">systemctl stop firewalld.service</span><br></pre></td></tr></table></figure><h4 id="重新启动防火墙"><a href="#重新启动防火墙" class="headerlink" title="重新启动防火墙"></a>重新启动防火墙</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">systemctl restart firewalld.service</span><br></pre></td></tr></table></figure>]]></content>
<summary type="html">
<h4 id="添加放行端口："><a href="#添加放行端口：" class="headerlink" title="添加放行端口："></a>添加放行端口：</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">firewall-cmd --permanent --zone=public --add-port=80/tcp</span><br></pre></td></tr></table></figure>
</summary>
<category term="Iptables" scheme="http://www.seifon.cn/categories/Iptables/"/>
<category term="centos" scheme="http://www.seifon.cn/tags/centos/"/>
<category term="linux" scheme="http://www.seifon.cn/tags/linux/"/>
<category term="iptables" scheme="http://www.seifon.cn/tags/iptables/"/>
<category term="防火墙" scheme="http://www.seifon.cn/tags/%E9%98%B2%E7%81%AB%E5%A2%99/"/>
</entry>
<entry>
<title>出圈算法</title>
<link href="http://www.seifon.cn/2017/04/13/%E5%87%BA%E5%9C%88%E7%AE%97%E6%B3%95/"/>
<id>http://www.seifon.cn/2017/04/13/出圈算法/</id>
<published>2017-04-12T16:58:00.000Z</published>
<updated>2018-01-24T15:13:45.000Z</updated>
<content type="html"><![CDATA[<h4 id="题目：有-people-个人站成一个圈，第一个人开始数数（从1开始），每数到-num-或者-num-的倍数此人就退出。最后剩下的人是多少号？"><a href="#题目：有-people-个人站成一个圈，第一个人开始数数（从1开始），每数到-num-或者-num-的倍数此人就退出。最后剩下的人是多少号？" class="headerlink" title="题目：有 people 个人站成一个圈，第一个人开始数数（从1开始），每数到 num 或者 num 的倍数此人就退出。最后剩下的人是多少号？"></a>题目：有 people 个人站成一个圈，第一个人开始数数（从1开始），每数到 num 或者 num 的倍数此人就退出。最后剩下的人是多少号？</h4><p>网上看了看，应该有很多种实现方法，在此摘录下来。</p><h5 id="方式一："><a href="#方式一：" class="headerlink" title="方式一："></a>方式一：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">static int cycle(int people, int num) { </span><br><span class="line"> int i, r = 0; </span><br><span class="line"> for (i = 2; i <= people; i++) { </span><br><span class="line"> r = (r + num) % i; </span><br><span class="line"> } </span><br><span class="line"> return r + 1; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="方式二："><a href="#方式二：" class="headerlink" title="方式二："></a>方式二：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">static int cycle(int people, int num) { </span><br><span class="line"> int i, r = 0; </span><br><span class="line"> for (i = 2; i <= people; i++) r = (r + num) % i;</span><br><span class="line"> return r + 1; </span><br><span class="line">}</span><br></pre></td></tr></table></figure><h5 id="方式三："><a href="#方式三：" class="headerlink" title="方式三："></a>方式三：</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line">private static int cycle(int people, int num) {</span><br><span class="line"> List<Integer> dataList = new LinkedList<Integer>(); </span><br><span class="line"> for (int i = 0; i < people; i++) { </span><br><span class="line"> dataList.add(new Integer(i + 1)); </span><br><span class="line"> } </span><br><span class="line"></span><br><span class="line"> int index = -1; </span><br><span class="line"> while (dataList.size() > 1) { </span><br><span class="line"> index = (index + num) % dataList.size(); </span><br><span class="line"> dataList.remove(index); </span><br><span class="line"> index--; </span><br><span class="line"> } </span><br><span class="line"> return dataList.get(0).intValue(); </span><br><span class="line">}</span><br></pre></td></tr></table></figure>]]></content>
<summary type="html">
<h4 id="题目：有-people-个人站成一个圈，第一个人开始数数（从1开始），每数到-num-或者-num-的倍数此人就退出。最后剩下的人是多少号？"><a href="#题目：有-people-个人站成一个圈，第一个人开始数数（从1开始），每数到-num-或者-num-
</summary>
<category term="算法" scheme="http://www.seifon.cn/categories/%E7%AE%97%E6%B3%95/"/>
<category term="算法" scheme="http://www.seifon.cn/tags/%E7%AE%97%E6%B3%95/"/>
<category term="数据结构" scheme="http://www.seifon.cn/tags/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/"/>
<category term="面试" scheme="http://www.seifon.cn/tags/%E9%9D%A2%E8%AF%95/"/>
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