company.txt

Optional.ofNullable(dept.getStatus()).orElse(1) jdk 允许为空，设置默认值
CollUtil.isEmpty（属性）
CollUtil.contains(topDeptList, id)

Objects.requireNonNull(id); 不允许为空
ObjectUtil.isNull(classT)

MapUtil.getStr(conditionMap, "dajdh");

getById（）
CollUtil.removeNull // 移除空

wrapper.and(i -> i.like("name", name).or()
                    .like("name_full_pin_yin", name).or()
                    .like("name_simple_pin_yin", name)
            );

 Set<Long> attendeeUserSet = meeting.getAttendeeUser().stream()
                    .filter(meetingAttendeeUser -> ObjectUtil.isNotNull(meetingAttendeeUser.getId()))
                    .map(MeetingAttendeeUser::getId).collect(Collectors.toSet());

		            boolean isBad = participantList.stream().anyMatch(participant -> StringUtils.isBlank(participant.getAddress()) || participant.getMeetingId() == null);