评论，回复，删评

src/main/java/com/lovenav/service/CommentService.java

@@ -6,5 +6,11 @@ import org.springframework.stereotype.Service;
 
 public interface CommentService {
 //    点赞
-    public String AddLikeCount(int id);
+    String AddLikeCount(int id);
+//    评论
+    String Reply1(Comment comment);
+//    回复
+    String Reply2(Comment comment);
+//    删除
+    String Delete(Comment comment);
 }

src/main/java/com/lovenav/service/serviceImpl/CommentServiceImpl.java

@@ -1,24 +1,78 @@
 package com.lovenav.service.serviceImpl;
 
+import com.alibaba.fastjson2.JSON;
 import com.alibaba.fastjson2.JSONObject;
 import com.lovenav.dao.CommentDao;
 import com.lovenav.entity.Comment;
 import com.lovenav.service.CommentService;
+import org.apache.ibatis.jdbc.Null;
 import org.mybatis.spring.annotation.MapperScan;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.util.HashMap;
+import java.util.List;
+
 @Service("commentService")
 public class CommentServiceImpl implements CommentService {
     @Autowired
     private CommentDao commentDao;
-
-    //    点赞++
+//    评论功能
+    @Override
+    public String Reply1(Comment comment){
+        int result = commentDao.insert(comment);
+        HashMap<String, Object> hashMap = new HashMap<>();
+        if(result > 0){
+            hashMap.put("msg", "评论成功");
+            return JSON.toJSONString(hashMap);
+        }
+        else{
+            hashMap.put("msg", "评论失败");
+            return JSON.toJSONString(hashMap);
+        }
+    }
+//    回复功能
+    @Override
+    public String Reply2(Comment comment){
+        List<Integer> list = commentDao.selectByRootId(comment.getRootCommentId());
+        if(list.size()<5){
+            commentDao.insert(comment);
+            return JSON.toJSONString(comment);
+        }else{
+            HashMap<String, Object> result = new HashMap<>();
+            result.put("code", 500);
+            result.put("msg", "回复超过上限");
+            String jsonString = JSONObject.toJSONString(result);
+            return JSON.toJSONString(result);
+        }
+    }
+//    删除
+    @Override
+    public String Delete(Comment comment){
+        int result = commentDao.deleteByPrimaryKey(comment.getId());
+        HashMap<String, Object> hashMap = new HashMap<>();
+        if (result > 0){
+            hashMap.put("msg", "删除成功");
+            String jsonString = JSONObject.toJSONString(hashMap);
+            return JSON.toJSONString(hashMap);
+        }else{
+            hashMap.put("msg","删除失败");
+            return JSON.toJSONString(hashMap);
+        }
+    }
+//    点赞++
     @Override
     public String AddLikeCount(int id){
         Comment comment = commentDao.selectByPrimaryKey(id);
+        if(comment.getLikeCount() == 0){
+
+        }
         comment.setLikeCount(comment.getLikeCount()+1);
-        commentDao.updateByPrimaryKey(comment);
-        return JSONObject.toJSONString(comment.getLikeCount());
+        int result = commentDao.updateByPrimaryKey(comment);
+        if(result>0){
+            return JSONObject.toJSONString(comment.getLikeCount());
+        }else{
+            return JSONObject.toJSONString("点赞失败");
+        }
     }
 }