解决循环依赖

src/main/java/cn/meteor/beyondclouds/modules/topic/service/impl/TopicServiceImpl.java

@@ -42,12 +42,16 @@ public class TopicServiceImpl extends ServiceImpl<TopicMapper, Topic> implements
     private TopicMapper topicMapper;
 
     @Autowired
-    public TopicServiceImpl(ITopicFollowService topicFollowService, IUserService userService, TopicMapper topicMapper) {
+    public TopicServiceImpl(ITopicFollowService topicFollowService, TopicMapper topicMapper) {
         this.topicFollowService = topicFollowService;
-        this.userService = userService;
         this.topicMapper = topicMapper;
     }
 
+    @Autowired
+    public void setUserService(IUserService userService) {
+        this.userService = userService;
+    }
+
     @Override
     public TopicDetail createTopic(String userId, String topicName) {