站内信优化

@@ -423,8 +423,8 @@ public class InBoxServiceImpl implements IInBoxService {
             if(CollectionUtils.isNotEmpty(inBoxes)){
                 result.put("lastMessage", inBoxes.get(0).getContent());
                 result.put("createTime", inBoxes.get(0).getCreateTime());
+                redisTemplate.setEx(inboxKey, inBoxes.get(0), CacheEnum.USERS_INBOX_VO_LAST_INFO.getCacheTime());
             }
-            redisTemplate.setEx(inboxKey, inBoxes.get(0), CacheEnum.USERS_INBOX_VO_LAST_INFO.getCacheTime());
         } else {
             result.put("lastMessage", inbox.getContent());
             result.put("createTime", inbox.getCreateTime());