ssm回复评论实现

发布于2021-05-30 11:56 阅读(1299) 评论(0) 点赞(2) 收藏(4)

前端实现回复评论

主要是记录一下这个回复评论怎么实现的。

自己前端的代码不熟悉，导致有几个点百度了很久。js和jQuery代码不熟悉

效果如下

在这里插入图片描述

评论的展示就用foreach遍历。

卡我的一个点：回复评论，需要下面的表单获取焦点的同时改变表单中隐藏的几个值（fatherId，fatherName）。就是在怎么点击事件传参数这个点不知道，后面百度了很久知道了==data-==定义属性的方法

<!-- 通过data-XXX 自定义XXX属性   -->
<span data-commentid="${comment.cid}" data-username="${comment.userName}" οnclick="btnReplyClick(this)">回复</span>

<script type="text/javascript">
		function btnReplyClick(elem){
			$("#reply").focus();
	        var commentId = $(elem).data('commentid');//这样直接.data()取自定义属性的值
	        var userName = $(elem).data('username');
	        $("#fatherId").val(commentId);//改变下面表单的input中的值
	        $("#fatherName").val(userName);
	        $("#fatherName").show();
		}
	</script>

下面给出我的这个例子

数据库的设计，只用了一张表，主要是表中要含有他父评论的id与name就可以实现回复评论

/*
 Navicat Premium Data Transfer

 Source Server         : test
 Source Server Type    : MySQL
 Source Server Version : 80018
 Source Host           : localhost:3306
 Source Schema         : repair

 Target Server Type    : MySQL
 Target Server Version : 80018
 File Encoding         : 65001

 Date: 25/05/2021 22:15:24
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for y_comments
-- ----------------------------
DROP TABLE IF EXISTS `y_comments`;
CREATE TABLE `y_comments`  (
  `cid` int(11) NOT NULL AUTO_INCREMENT,
  `comment` varchar(200) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL,
  `rid` int(11) NULL DEFAULT NULL,
  `uid` int(11) NULL DEFAULT NULL,
  `father_id` int(11) NULL DEFAULT NULL,
  `father_name` varchar(20) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`cid`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1017 CHARACTER SET = utf8 COLLATE = utf8_bin ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of y_comments
-- ----------------------------
INSERT INTO `y_comments` VALUES (1012, '为什么', 10013, 12, -1, '-1', '2021-05-25 07:59:25');
INSERT INTO `y_comments` VALUES (1013, '修的怎么样', 10013, 10, -1, '-1', '2021-05-25 08:01:51');
INSERT INTO `y_comments` VALUES (1014, '纳尼', 10013, 10, 1012, 'xiaohong', '2021-05-25 10:53:16');
INSERT INTO `y_comments` VALUES (1015, '游戏撒反对', 10013, 11, 1012, 'xiaohong', '2021-05-25 11:31:42');
INSERT INTO `y_comments` VALUES (1016, '你在说什么？？？？', 10013, 10, 1015, 'xiaomi', '2021-05-25 11:57:41');

SET FOREIGN_KEY_CHECKS = 1;

实体类的设计，主要是把子评论设计进去(这里省略 get set 构造 tostring）

public class Comments {
	private int cid;
	private String comment;
	private String userName;
	private Date createTime;
	
	//子集评论
	private List<Comments> chridComments;
	private int fatherId;
	private String fatherName;
}

查询评论和保存评论，其实保存评论就是一个insert没什么技术，查询还是有一点点意思，需要迭代的查询出所有的子评论

//获取全部的评论评论
	public List<Comments> getComments(String rid,String fatherId){
		//获得一级评论
		List<Comments> retComments = userDao.getComments(rid, fatherId);
		//获取二级评论
		for(Comments comment : retComments) {
			int id = comment.getCid();
			String name = comment.getUserName();
			System.out.println(id+"===>");
			List<Comments> chirdComments = userDao.getComments(rid, id+"");
			//迭代查出所有的子评论
			findChildComments(rid,chirdComments,name);
			comment.setChridComments(temp);
			temp = new ArrayList<>();//这里不知道为什么用clear()就不行
		}
		return retComments;
	}
	
	//查出子评论
	public void findChildComments(String rid,List<Comments> comments,String fatherName) {
		for(Comments comment : comments) {
			int id = comment.getCid();
			String name = comment.getUserName();
			comment.setFatherName(fatherName);
			temp.add(comment);
			List<Comments> chirdComments = userDao.getComments(rid, id+"");
			//迭代查出所有的子评论
			findChildComments(rid,chirdComments,name);
		}
	}

前端页面用的框架layui

<ul class="jieda" id="jieda">
			<!-- 遍历出评论 -->
		<c:forEach items="${commentinfos}" var="comment">
		
          <li data-id="13">
			<div class="detail-about detail-about-reply">
              <a class="jie-user" href="">
                <img src="../static/images/default.png" alt="">
                <cite>
                  <i><c:out value="${comment.userName}"></c:out></i>
                </cite>
              </a>
              <div class="detail-hits">
                <span><fmt:formatDate value="${comment.createTime}" pattern="yyyy/MM/dd HH:mm:ss"/></span>
              </div>
              </div>
              <div class="detail-body jieda-body">
              <p><c:out value="${comment.comment}"></c:out></p>
            	</div>
     			<div class="jieda-reply">
               <span data-commentid="${comment.cid}" data-username="${comment.userName}" οnclick="btnReplyClick(this)">回复</span>
              <div class="jieda-admin">
              
              </div>
            </div>
            
            
            <!-- ===============================子评论 -->
            
		<c:forEach items="${comment.chridComments}" var="childcomment">
            	<div class="detail-about detail-about-reply" style="margin-left: 50px">
              <a class="jie-user" href="">
                <img src="../static/images/default.png" alt="">
                <cite>
                  <i><c:out value="${childcomment.userName}@${childcomment.fatherName}"></c:out></i>
                </cite>
              </a>
              <div class="detail-hits">
                <span><fmt:formatDate value="${childcomment.createTime}" pattern="yyyy/MM/dd HH:mm:ss"/></span>
              </div>
              </div>
              <div class="detail-body jieda-body" style="margin-left: 50px">
              <p><c:out value="${childcomment.comment}"></c:out></p>
            	</div>
     			<div class="jieda-reply" style="margin-left: 50px">
               <span data-commentid="${childcomment.cid}" data-username="${childcomment.userName}" οnclick="btnReplyClick(this)">回复</span>
              <div class="jieda-admin" style="margin-left: 50px">
              
              </div>
            </div>
            </c:forEach>
            </li>
		</c:forEach>
			
            </ul>

原文链接:https://blog.csdn.net/weixin_44424328/article/details/117266124