public class getUserInfoEvent extends ApplicationEvent {
    private String message;
    private Integer griddingId;
    private StringBuilder griddingName;
   public getUserInfoEvent(Object source, String message, Integer griddingId, StringBuilder griddingName) {
        super(source);
        this.message = message;
        this.griddingId = griddingId;
        this.griddingName = griddingName;//接收要獲取到值的StringBuilder
    }
   public StringBuilder getGriddingName() {
        return griddingName;
    }
   public Integer getGriddingId() {
        return griddingId;
    }
   public String getMessage() {
        return message;
    }
}

   @Autowired
   ApplicationEventPublisher applicationEventPublisher;   //這個必須注入
@Override
   public SysUserVO getUserInfo(Long userId) {
       SysUser user = getById(userId);
       Integer griddingId = user.getGriddingId();
       StringBuilder griddingName= new StringBuilder();  //使用stringbuilder進(jìn)行引用字符串操作，來獲取需要的值
	//上面是業(yè)務(wù)相關(guān)
       getUserInfoEvent event = new getUserInfoEvent(this,"發(fā)布“獲取用戶信息”事件",griddingId,griddingName); //定義事件
       applicationEventPublisher.publishEvent(event);  //發(fā)布事件
       //下面是獲取到數(shù)據(jù)之后的操作，不重要
       //這里事件是同步進(jìn)行的
       SysUserVO sysUserVO = new SysUserVO();
       BeanUtils.copyProperties(user,sysUserVO);
       sysUserVO.setGriddingName(griddingName.toString());
       //  找到該用戶所屬角色
       String roleName = getRoleByUserId(userId);
       sysUserVO.setRoleName(roleName);
       SysUser parentUser = sysUserMapper.selectById(user.getParentId());
       sysUserVO.setParentName(ObjectUtils.isEmpty(parentUser) ? null : parentUser.getUserName());
       return sysUserVO;
   }

@EventListener
public void getGriddingNameByUserIdEventListener(getUserInfoEvent event) { //參數(shù)必須填寫要監(jiān)聽的事件類，事件發(fā)布后這邊就會監(jiān)聽到
    //形參event中存有傳遞的相關(guān)數(shù)據(jù)
    System.out.println(event.getMessage()); //會打印出---發(fā)布“獲取用戶信息”事件
    //下面為個人業(yè)務(wù)相關(guān)代碼
    Integer griddingId = event.getGriddingId();
    StringBuilder griddingName = event.getGriddingName();
    //再通過網(wǎng)格id來查找對應(yīng)的網(wǎng)格信息
    GriddingArea griddingArea = getOne(new LambdaQueryWrapper<GriddingArea>().eq(GriddingArea::getId, griddingId));
    griddingName.append(griddingArea.getGriddingName());  //使用同一個StringBuilder對象來操作，這里把獲取到的字符串存入后，事件發(fā)布者那邊就能得到數(shù)據(jù)了。
    System.out.println("griddingName"+griddingName);
}