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java怎么实现评论和回复功能

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406 2023-05-03

java怎么实现评论和回复功能

效果展示

总共是两层回复 (回复评论、回复评论下的回复)

数据库设计

评论表(TFW_Comments)和回复内容表(TFW_UserResponse)以及评论回复关系表(TFW_MsgRelation)

数据库设计思路:

注:各位读者自动忽略评论表的服务机构ID字段,这个字段相当于这条评论是在哪个帖子(文章下面)

1、根据文章ID或者是帖子ID查询评论表获取评论(本文的服务机构ID)。第一层(评论)

2、根据评论ID并且回复类型等于1的去关系表获取第二层的回复(commentsId)。第二层(评论下的回复)

3、根据评论ID、回复类型等于2、回复ID去关系表获取第三层回复。第三层(评论下回复中的回复)注:回复ID是它的上级

实现类源码

@Override

    public Map<String, Object> findComments(JSONObject jsonObject) {

        data.clear();

        String userId = jsonObject.getString("userId");

 

        String role = this.role(jsonObject);

        if (role.equals("-1")){

            //没有权限

            data.put("error","-1");

            data.put("msg","当前用户没有权限");

            return data;

        }

 

        List<Map<String, Object>> info = commentsDao.findComment(jsonObject.getString("fWJLID"),null);

        //查询点赞次数

        int countTag = 0;

        MsgRelationTag msgRelationTag = new MsgRelationTag();

 

        for (Map item : info){

            item.put("inputShow",false);

            int commentsId = (int) item.get("commentsId");

            //查询点赞次数

             countTag = msgRelationDao.findCountTagByTagId(commentsId,1);

            item.put("countTag",countTag);

            //设置点赞状态

            msgRelationTag.setTagId(commentsId);

            msgRelationTag.setTagType(1);

            msgRelationTag.setTagUserId(Integer.parseInt(userId));

            MsgRelationTag msgTag = msgRelationDao.findMsgTag(msgRelationTag);

            if (msgTag != null) {

                item.put("tagStatus",msgTag.getStatus());

            }else {

                item.put("tagStatus","");

            }

            //如果有@id

            if (item.get("atId") != null){

                String content = item.get("content").toString();

                StringBuffer tmrAtId = findUserName(item.get("atId").toString());

                item.put("content",content+'@'+tmrAtId);

            }

            //二级回复数据

            List<Map<String, Object>> twoReply = new ArrayList<>();

            //所有数据

            List<Map<String, Object>> userResponse = userResponseDao.findUserResponse(commentsId, null, "","",null);

            for (Map userResponseInfo :userResponse){

                int userResponseIds = Integer.parseInt(userResponseInfo.get("userResponseId").toString());

                //查询点赞次数

                countTag = msgRelationDao.findCountTagByTagId(userResponseIds,2);

                //设置点赞状态

                msgRelationTag.setTagId(userResponseIds);

                msgRelationTag.setTagType(2);

                msgTag = msgRelationDao.findMsgTag(msgRelationTag);

                if (msgTag != null) {userResponseInfo.put("tagStatus",msgTag.getStatus());}else {userResponseInfo.put("tagStatus","");}

                userResponseInfo.put("countTag",countTag);

                userResponseInfo.put("inputShow",false);

                Integer responseType = (Integer) userResponseInfo.get("responseType");

                for (Map stairReplyInfo : userResponse){

                    Integer  userResponseId = (Integer) stairReplyInfo.get("userResponseId");

                    int msgRelationId = Integer.parseInt(stairReplyInfo.get("msgRelationId").toString());

                    //接受者id*/

                    twoReply = userResponseDao.findUserResponse(msgRelationId, userResponseId,"1","",null); //二级回复数据

                    for (Map twoReplyItem : twoReply){

                        int twoReplyId = Integer.parseInt(twoReplyItem.get("userResponseId").toString());

                        twoReplyItem.put("inputShow",false);

                        //查询点赞次数

                        countTag = msgRelationDao.findCountTagByTagId(twoReplyId,2);

                        twoReplyItem.put("countTag",countTag);

                        //设置点赞状态

                        msgRelationTag.setTagId(twoReplyId);

                        msgTag = msgRelationDao.findMsgTag(msgRelationTag);

                        if (msgTag != null) {twoReplyItem.put("tagStatus",msgTag.getStatus());}else {twoReplyItem.put("tagStatus","");}

                        String userRepContent = twoReplyItem.get("userRepContent").toString();

                        if (twoReplyItem.get("tmrAtId") != null){

                            StringBuffer tmrAtId = findUserName(twoReplyItem.get("tmrAtId").toString());

                            twoReplyItem.put("userRepContent",userRepContent+'@'+tmrAtId);

                        }

 

                    }

                    stairReplyInfo.put("twoReply",twoReply);

                }

            }

            item.put("stairReply",userResponse);

        }

        data.put("data",info);

        data.put("error",0);

        data.put("msg","查询成功");

        return data;

    }

其它的代码可以忽略。主要语句有:

获取帖子下的评论

 List<Map<String, Object>> info = commentsDao.findComment(jsonObject.getString("fWJLID"),null);

上图根据FWJLID获取评论。(此处可以当成帖子的ID,获取帖子下的评论)一级展示

对应SQL语句(OPT是我的用户表)

select tc.content ,tc.commentsId,convert(varchar(19),tc.startTime,120) as startTime,tc.recipientId ,tc.operatorId,zo.NAME as operatorName,tc.atId,zo.HeadImgUrl as operatorHeadImgUrl

         from TFW_Comments tc

         left join zd_opt zo on zo.AID = tc.operatorId where tc.FWJLID = 5101

查询结果:

 获取评论下的回复

List<Map<String, Object>> userResponse = userResponseDao.findUserResponse(commentsId, null, "","",null);

上图根据commentsid获取评论下的回复。(根据评论ID获取回复)二级展示

对应sql语句

select

 	 tur.userResponseId,tur.operatorId,tur.recipientId,convert(varchar(19),tur.startTime,120) as startTime,tur.userRepContent,tmr.atId as tmrAtId,

 	 tmr.msgRelationId ,tmr.responseType,tmr.replyId,

        zo.NAME as operatorName,

        zo1.NAME as recipientName,

        zo.HeadImgUrl as operatorHeadImgUrl,

        zo1.HeadImgUrl as recipientHeadImgUrl

        from TFW_MsgRelation tmr

        left join TFW_UserResponse tur on tur.userResponseId = tmr.userResponseId

        left join zd_opt zo on zo.AID = tur.operatorId

        left join zd_opt zo1 on zo1.AID = tur.recipientId where tmr.commentsId = 47

查询结果

 获取二级回复

 twoReply = userResponseDao.findUserResponse(msgRelationId, userResponseId,"1","",null); //二级回复数据

上图是根据评论ID(msgRelationId)和回复ID(userResponseId)去获取二级回复。回复ID也就是父类。就是回复那一条回复的ID。 第三层展示

对应sql

select

 	 tur.userResponseId,tur.operatorId,tur.recipientId,convert(varchar(19),tur.startTime,120) as startTime,tur.userRepContent,tmr.atId as tmrAtId,

 	 tmr.msgRelationId ,tmr.responseType,tmr.replyId,

        zo.NAME as operatorName,

        zo1.NAME as recipientName,

        zo.HeadImgUrl as operatorHeadImgUrl,

        zo1.HeadImgUrl as recipientHeadImgUrl

        from TFW_MsgRelation tmr

        left join TFW_UserResponse tur on tur.userResponseId = tmr.userResponseId

        left join zd_opt zo on zo.AID = tur.operatorId

        left join zd_opt zo1 on zo1.AID = tur.recipientId where tmr.commentsId = 136 and tmr.replyId = 155

查询结果

返回页面展示和返回体展示