Springboot+ElementUi實現評論、回復、點贊功能
1.概述
做一個項目，突然需要實現回復功能，所依記錄一下此次的一個實現思路，也希望給別人分享一下，估計代碼還是不夠完善，有空在實現分頁功能。話不多說直接看效果圖。主要實現瞭評論，回復，點贊，取消點贊，如果是自己評論的還可以刪除，刪除的規則是如果該評論下還有回復，也一並刪除。
我這裡管理的是課程id，可以根據需要把課程id換為其他核心業務的id進行關聯，也可以把表進行拆分，評論表和回復表。不過我為瞭方便就沒有進行拆分。具體的實現思路我都寫有詳細步驟，看註釋即可
效果圖：
2.前端代碼
1.html
<div>
<div v-clickoutside="hideReplyBtn" @click="inputFocus" class="my-reply">
<el-avatar class="header-img" :size="40" :src="userAvatar"></el-avatar>
<div class="reply-info">
<div
tabindex="0"
contenteditable="true"
id="replyInput"
spellcheck="false"
placeholder="輸入評論..."
class="reply-input"
@focus="showReplyBtn"
@input="onDivInput($event)"
></div>
</div>
<div class="reply-btn-box" v-show="btnShow">
<el-button
class="reply-btn"
size="medium"
@click="sendComment"
type="primary"
>
發表評論
</el-button>
</div>
</div>
<div
v-for="(item, i) in comments"
:key="i"
class="author-title reply-father"
>
<el-avatar class="header-img" :size="40" :src="item.avatar"></el-avatar>
<div class="author-info">
<span class="author-name">{{ item.name }}</span>
<span class="author-time">{{ item.time }}</span>
</div>
<div class="icon-btn">
<span
v-if="item.memberId != myId"
@click="showReplyInput(i, j,item)"
>
<i class="iconfont el-icon-s-comment"></i>
{{ item.commentNum }}
</span>
<span v-else>
<i class="iconfont el-icon-s-comment" @click="noReply()"></i>
{{ item.commentNum }}
</span>
<span class="xin" @click="countlikeNumber('comment', i, 0, item.id)">
<i
class="el-icon-star-on"
v-if="item.likeListId.indexOf(myId) != -1"
>
</i>
<i class="el-icon-star-off" v-else></i>{{ item.likeCount }}
</span>
<span
class="el-icon-delete"
v-if="item.memberId == myId"
@click="deleteCommentById(item)"
></span>
</div>
<div class="talk-box">
<p>
<span class="reply">{{ item.content }}</span>
</p>
</div>
<!-- 回復開始 -->
<div class="reply-box">
<div v-for="(reply, j) in item.reply" :key="j" class="author-title">
<el-avatar
class="header-img"
:size="40"
:src="reply.avatar"
></el-avatar>
<div class="author-info">
<span class="author-name">{{ reply.name }}</span>
<span class="author-time">{{ reply.time }}</span>
</div>
<div class="icon-btn">
<span
@click="
showReplyInput(i, j, reply)
"
v-if="reply.memberId != myId"
>
<i class="iconfont el-icon-s-comment"></i>
{{ reply.commentNum }}
</span>
<span v-else>
<i class="iconfont el-icon-s-comment" @click="noReply()"></i>
{{ reply.commentNum }}
</span>
<span @click="countlikeNumber('reply', i, j, reply.id)">
<i
class="el-icon-star-on"
v-if="reply.likeListId.indexOf(myId) != -1"
>
</i>
<i class="el-icon-star-off" v-else></i>{{ reply.likeCount }}
</span>
<span
class="el-icon-delete"
v-if="reply.memberId == myId"
@click="deleteCommentById(reply)"
></span>
</div>
<div class="talk-box">
<p>
<b style="color: red">回復 {{ reply.fromName }}:</b>
<span class="reply">{{ reply.content }}</span>
</p>
</div>
<div class="reply-box"></div>
</div>
</div>
<!-- 回復結束 -->
<div v-show="_inputShow(i)" class="my-reply my-comment-reply">
<el-avatar
class="header-img"
:size="40"
:src="userAvatar"
></el-avatar>
<div class="reply-info">
<div
tabindex="0"
contenteditable="true"
spellcheck="false"
:placeholder="replyMessage"
@input="onDivInput($event)"
class="reply-input reply-comment-input"
></div>
</div>
<div class="reply-btn-box">
<el-button
class="reply-btn"
size="medium"
@click="sendCommentReply(i)"
type="primary"
>
發表回復
</el-button>
</div>
</div>
</div>
</div>
2.css
.my-reply {
padding: 10px;
background-color: #fafbfc;
}
.my-reply .header-img {
display: inline-block;
vertical-align: top;
}
.my-reply .reply-info {
display: inline-block;
margin-left: 5px;
width: 80%;
}
@media screen and (max-width: 1200px) {
.my-reply .reply-info {
width: 80%;
}
}
.my-reply .reply-info .reply-input {
min-height: 20px;
line-height: 22px;
padding: 10px 10px;
color: #ccc;
background-color: #fff;
border-radius: 5px;
}
.my-reply .reply-info .reply-input:empty:before {
content: attr(placeholder);
}
.my-reply .reply-info .reply-input:focus:before {
content: none;
}
.my-reply .reply-info .reply-input:focus {
padding: 8px 8px;
border: 2px solid blue;
box-shadow: none;
outline: none;
}
.my-reply .reply-btn-box {
height: 25px;
display: inline-block;
}
.my-reply .reply-btn-box .reply-btn {
position: relative;
float: right;
margin-left: 15px;
}
.my-comment-reply {
margin-left: 50px;
}
.my-comment-reply .reply-input {
width: flex;
}
.author-title:not(:last-child) {
border-bottom: 1px solid rgba(74, 136, 199, 0.3);
}
.reply-father {
padding: 10px;
}
.reply-father .header-img {
display: inline-block;
vertical-align: top;
}
.reply-father .author-info {
display: inline-block;
margin-left: 5px;
width: 60%;
height: 40px;
line-height: 20px;
}
.reply-father .author-info span {
display: block;
cursor: pointer;
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
}
.reply-father .author-info .author-name {
color: #000;
font-size: 18px;
font-weight: bold;
}
.reply-father .author-info .author-time {
font-size: 14px;
}
.reply-father .author-info .author-count{
font-size: 15px; color: blue;
}
.reply-father .icon-btn {
width: 30%;
padding: 0 !important ;
float: right;
}
@media screen and (max-width: 1200px) {
.reply-father .icon-btn {
width: 20%;
padding: 7px;
}
}
.reply-father .icon-btn span {
cursor: pointer;
}
.reply-father .icon-btn .iconfont {
margin: 0 5px;
}
.reply-father .talk-box {
margin: 0 50px;
}
.reply-father .talk-box p {
margin: 0;
}
.reply-father .talk-box .reply {
font-size: 16px;
color: #000;
}
.reply-father .reply-box {
margin: 10px 0 0 50px;
background-color: #efefef;
}
3.js
<script>
import commentApi from "@/api/comment";
import courseApi from "@/api/course";
import cookie from "js-cookie";
const clickoutside = {
// 初始化指令
bind(el, binding, vnode) {
function documentHandler(e) {
// 這裡判斷點擊的元素是否是本身，是本身，則返回
if (el.contains(e.target)) {
return false;
}
// 判斷指令中是否綁定瞭函數
if (binding.expression) {
// 如果綁定瞭函數 則調用那個函數，此處binding.value就是handleClose方法
binding.value(e);
}
}
// 給當前元素綁定個私有變量，方便在unbind中可以解除事件監聽
el.vueClickOutside = documentHandler;
document.addEventListener("click", documentHandler);
},
update() {},
unbind(el, binding) {
// 解除事件監聽
document.removeEventListener("click", el.vueClickOutside);
delete el.vueClickOutside;
},
};
Date.prototype.format = function (fmt) {
var o = {
"M+": this.getMonth() + 1, //月份
"d+": this.getDate(), //日
"h+": this.getHours(), //小時
"m+": this.getMinutes(), //分
"s+": this.getSeconds(), //秒
"q+": Math.floor((this.getMonth() + 3) / 3), //季度
S: this.getMilliseconds(), //毫秒
};
if (/(y+)/.test(fmt)) {
fmt = fmt.replace(
RegExp.$1,
(this.getFullYear() + "").substr(4 - RegExp.$1.length)
);
}
for (var k in o) {
if (new RegExp("(" + k + ")").test(fmt)) {
fmt = fmt.replace(
RegExp.$1,
RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length)
);
}
}
return fmt;
};
export default {
created() {
// 將用戶數據從本地cookie獲取到
this.getUserInfo();
// 獲取評論數據
this.initCommentList(this.course.id);
},
mounted() {},
data() {
return {
course: {
courseId: "",
},
btnShow: false,
index: "0",
replyComment: "",
subIndex: "0",
userName: "", // 當前用戶name
userAvatar: "", // 當前用戶頭像
myId: null, // 當前用戶id
replyMessage:"",
comments: [],
current:{}, // 當前被點擊的評論對象
};
},
methods: {
// 將cookie的用戶信息提取出來
getUserInfo() {
let user = cookie.get("userInfo");
if (user) {
let userInfo = JSON.parse(user);
this.userName = userInfo.nickname;
this.userAvatar = userInfo.avatar;
this.myId = userInfo.id;
}
},
// 獲取評論數據
initCommentList(courseId) {
commentApi.getCommentList(courseId).then((response) => {
// 先將獲取到的數據進行轉換
let commentList = response.data.commentList;
for (let i = 0; i < commentList.length; i++) {
// 先將父級評論轉化likeListId為數組
commentList[i].likeListId = commentList[i].likeListId.split(",");
// 找到子級評論將likeListId為數組
for (let j = 0; j < commentList[i].reply.length; j++) {
commentList[i].reply[j].likeListId =
commentList[i].reply[j].likeListId.split(",");
}
}
this.comments = commentList;
});
},
// 驗證用戶是否登錄
userIsLogin(){
let user = cookie.get("userInfo");
if(user==null){
this.$confirm('評論操作需要先登錄，是否現在跳轉到登錄頁面?', '溫馨提示', {
confirmButtonText: '是',
cancelButtonText: '否',
type: 'warning'
}).then(() => {
this.$router.push({path: "/login"});
}).catch(() => {
this.$message({
type: 'success',
message: '已經為您取消跳轉到登錄頁面'
});
});
return "no"
}
return "yes"
},
/**
* 傳遞一個對象過來，將其深拷貝，不會在共用同一個引用
* targetObj:需要拷貝的對象
*
*/
copyObject(targetObj,type){
let comment = {...targetObj}
// 裝換為以,號分割的字符串 [因為後臺采用的是String進行存儲]
comment.likeListId = comment.likeListId.join(",")
// 刪除掉該屬性，不然後臺接收會報錯
delete comment.reply
return comment;
},
// 輸入框被點擊是觸發
inputFocus() {
var replyInput = document.getElementById("replyInput");
replyInput.style.padding = "8px 8px";
replyInput.style.border = "2px solid blue";
replyInput.focus();
},
// 顯示回復按鈕
showReplyBtn() {
this.btnShow = true;
},
// 提示不能給自己回復
noReply() {
this.$message({
message: "對不起!暫不支持自己給自己回復",
type: "warning",
});
},
// 隱藏回復按鈕
hideReplyBtn() {
this.btnShow = false;
replyInput.style.padding = "10px";
replyInput.style.border = "none";
},
/**
* 顯示輸入框[評論和回復共用]
* i：頂級評論下標
* j：子級評論下標
* current:當前被點擊的評論記錄
*
*/
showReplyInput(i, j,current ) {
this.current=current
if (current.fatherId === "-1") {
this.parentId = current.id;
} else {
this.parentId = current.fatherId;
}
this.replyMessage = "回復:" + current.name;
this.comments[this.index].inputShow = false;
this.index = i;
this.comments[i].inputShow = true;
this.toName = current.name;
this.toId = current.id;
this.subIndex = j == "0" ? "0" : j;
},
/**
* 根據id刪除評論(前提是該評論是當前用戶所評論的)
*/
deleteCommentById(current) {
let comment = this.copyObject(current)
console.log("current=",current)
commentApi.deleteCommentById(comment).then((response) => {
if (response.success) {
this.$message({
showClose: true,
type: "success",
message: "刪除成功",
});
// 重新獲取獲取評論數據
this.initCommentList(this.course.id);
}
});
},
/**
*
* 統計點贊數量
* type：是回復還是評論
* i:一級評論
* j:二級評論
*/
countlikeNumber(type, i, j, id) {
// 判斷用戶是否登錄
if( this.userIsLogin()=="no") return;
const commentObje = type == "comment" ? this.comments[i] : this.comments[i].reply[j];
let list = commentObje.likeListId;
if (list.length === 0 || list.indexOf(this.myId) == -1) {
//在已經點贊的列表中未找到userId
commentObje.isLike = true;
commentObje.likeCount += 1;
commentObje.likeListId.push(this.myId);
// 將對象復制一份並且去除掉reply屬性,避免後臺接收數據出現異常
let comment = this.copyObject(commentObje)
// 發送請求到後臺修改點贊數量
commentApi.updateLikeCount(comment).then(response=>{
if(response.success){
// 重新獲取獲取評論數據
this.initCommentList(this.course.id);
this.$message({
type:"success",
message:"點贊成功"
})
}
})
console.log("點贊+1", commentObje.like, commentObje.likeListId);
} else {
const index = list.indexOf(this.myId);
commentObje.isLike = false;
commentObje.likeCount -= 1;
commentObje.likeListId.splice(index, 1);
console.log("點贊-1", commentObje.likeListId);
let comment = this.copyObject(commentObje)
// 發送請求到後臺修改點贊數量
commentApi.updateLikeCount(comment).then(response=>{
if(response.success){
// 重新獲取獲取評論數據
this.initCommentList(this.course.id);
this.$message({
type:"success",
message:"取消點贊成功"
})
}
})
}
console.log("commentObje=", commentObje);
},
// 是否顯示輸入框
_inputShow(i) {
return this.comments[i].inputShow;
},
// 發送評論
sendComment() {
if( this.userIsLogin()=="no") return;
if (!this.replyComment) {
this.$message({
type: "warning",
message: "評論不能為空",
});
} else {
// 評論內容對象
let object = {};
let input = document.getElementById("replyInput");
object.courseId = this.course.id;
object.name = this.userName;
object.content = this.replyComment;
object.avatar = this.userAvatar;
object.commentNum = 0;
object.likeCount = 0;
object.fromId="-1"
object.memberId = this.myId;
object.isLike = false;
object.likeListId = "0,0";
object.parentId = "-1";
object.time = new Date().format("yyyy-MM-dd hh:mm:ss");
this.replyComment = "";
input.innerHTML = "";
commentApi.addComment(object,this.current).then((response) => {
if (response.success) {
// 重新獲取獲取評論數據
this.initCommentList(this.course.id);
this.$message({
type: "success",
message: "評論成功",
});
}
});
}
},
// 發送回復
sendCommentReply(i) {
if( this.userIsLogin()=="no") return;
if (!this.replyComment) {
this.$message({
showClose: true,
type: "warning",
message: "回復不能為空",
});
} else {
// 回復內容對象
let current = {};
if(this.current.parentId == "-1" ){
current.parentId = this.current.id
}else{
current.parentId = this.current.parentId
}
current.courseId = this.course.id;
current.name = this.userName;
current.memberId = this.myId;
current.content = this.replyComment;
current.avatar = this.userAvatar;
current.commentNum = 0;
current.likeCount = 0;
current.isLike = false;
current.likeListId = "0,0";
current.fromName = this.current.name;
current.fromId = this.current.id;
current.time = new Date().format("yyyy-MM-dd hh:mm:ss");
// 得到當前被點擊的評論對象，修改他的回復條數
this.current.commentNum += 1
let parent = {...this.current}
parent.likeListId = parent.likeListId.join(",")
delete parent.reply // 刪除掉該屬性，不然後臺接收會報錯[後臺采用的是String進行存儲]
console.log("current=",current)
console.log("parent=",parent)
commentApi.addComment(current,parent).then((response) => {
if (response.success) {
// 重新獲取獲取評論數據
this.initCommentList(this.course.id);
this.$message({
showClose: true,
type: "success",
message: "回復成功",
});
}
});
// 清空輸入框內容
this.replyComment = "";
document.getElementsByClassName("reply-comment-input")[i].innerHTML = "";
}
},
onDivInput: function (e) {
this.replyComment = e.target.innerHTML;
}
};
</script>
<style lang="scss">
@import "@/assets/css/comment.css";
</style>
4.api調用後臺接口
import request from "@/utils/request";
export default {
// 根據課程id獲取評論信息
getCommentList(courseId) {
return request({
url: `/serviceedu/edu-comment/getCommentList/${courseId}`,
method: "get",
});
},
// 添加一條評論記錄
addComment(current,parent) {
return request({
url: `/serviceedu/edu-comment/addComment`,
method: "post",
data:{current,parent}
});
},
// 根據評論id刪除一條記錄
deleteCommentById(current) {
return request({
url: `/serviceedu/edu-comment/deleteCommentById`,
method: "delete",
data:current
});
},
// 修改評論的點贊數量
updateLikeCount(comment) {
return request({
url: `/serviceedu/edu-comment/updateLikeCount`,
method: "post",
data:comment
});
},
};
3.後端代碼
1.數據庫SQL
/*
Navicat Premium Data Transfer
Source Server : WindowsMysql
Source Server Type : MySQL
Source Server Version : 50732
Source Host : localhost:3306
Source Schema : guli_edu
Target Server Type : MySQL
Target Server Version : 50732
File Encoding : 65001
Date: 24/01/2022 22:54:47
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for edu_comment
-- ----------------------------
DROP TABLE IF EXISTS `edu_comment`;
CREATE TABLE `edu_comment` (
`id` char(19) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '主鍵id',
`course_id` varchar(19) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '課程id',
`teacher_id` char(19) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '講師id',
`member_id` varchar(19) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '用戶id',
`name` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '用戶昵稱',
`avatar` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '用戶頭像',
`content` varchar(500) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '評論內容',
`parent_id` char(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '父級評論id\r\n',
`comment_num` int(11) NULL DEFAULT NULL COMMENT '回復條數',
`like_count` int(11) NULL DEFAULT NULL COMMENT '點贊數量',
`is_like` tinyint(1) NULL DEFAULT 0 COMMENT '是否點贊',
`like_list_id` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '點贊id列表',
`input_show` tinyint(1) NULL DEFAULT 0 COMMENT '是否顯示輸入框',
`time` datetime(0) NULL DEFAULT NULL COMMENT '評論創建時間',
`from_id` char(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '回復記錄id\r\n',
`from_name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NULL DEFAULT NULL COMMENT '回復人名稱\r\n',
`gmt_modified` datetime(0) NOT NULL COMMENT '更新時間',
`gmt_create` datetime(0) NOT NULL COMMENT '創建時間',
`is_deleted` tinyint(1) UNSIGNED NOT NULL DEFAULT 0 COMMENT '邏輯刪除 1（true）已刪除， 0（false）未刪除',
PRIMARY KEY (`id`) USING BTREE,
INDEX `idx_course_id`(`course_id`) USING BTREE,
INDEX `idx_teacher_id`(`teacher_id`) USING BTREE,
INDEX `idx_member_id`(`member_id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci COMMENT = '評論' ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of edu_comment
-- ----------------------------
INSERT INTO `edu_comment` VALUES ('123963852741', '1482334670241763330', '', '1484454710336294913', 'compass', 'https://thirdwx.qlogo.cn/mmopen/vi_32/1JYibUaLyibKXk4VDEvDGyEUgFNAGrIHibRY4iatO3atSD1YERDS6qZbbbdibNpnsPqYF7kJxicAGtehHAAjiajrrict7g/132', 'spring如何實現AOP功能?', '-1', 4, 2, 1, ',1191616288114163713,1484112436503019522', 0, '2021-12-01 15:42:35', '-1', NULL, '2022-01-24 13:32:50', '2022-01-23 15:42:31', 0);
INSERT INTO `edu_comment` VALUES ('123963852742', '1482334670241763330', '', '1191616288114163713', '馬超', 'https://guli-edu-compass.oss-cn-hangzhou.aliyuncs.com/avatar/2022-01-16/g.png', 'Joinpoint(連接點)： 在Sping程序中允許你使用通知或增強的地方，這種地方比較多，可以是方法前後，也可以是拋出異常的時，這裡隻提到瞭方法連接點，這是因為Spring隻支持方法類型的連接點。再通俗一點就是哪些方法可以被增強（使用通知），這些方法稱為連接點。', '123963852741', 1, 2, 1, ',1191616288114163713,1484112436503019522', 0, '2022-01-01 15:42:35', '123963852741', 'compass', '2022-01-24 13:32:50', '2022-01-23 15:42:31', 0);
INSERT INTO `edu_comment` VALUES ('123963852743', '1482334670241763330', '', '1484112436503019522', '卡夫卡', 'https://guli-edu-compass.oss-cn-hangzhou.aliyuncs.com/avatar/2022-01-16/b80d2ab57bc0401db0aee83746e94b1d-file.png', 'Pointcut(切入點)： 連接點是Spinrg程序中允許你使用通知或增強的地方，但是不是所有允許使用通知或增強的地方的地方都需要通知（增強）的，隻有那些被我們使用瞭通知或者增強的地方才能稱之為切入點。再通俗一點就是類中實際被增加（使用瞭通知）的方法稱為切入點。', '123963852741', 1, 2, 1, '0,1191616288114163713,1484112436503019522', 0, '2020-01-01 15:42:35', '123963852741', 'compass', '2022-01-24 10:36:58', '2022-01-23 15:42:31', 0);
INSERT INTO `edu_comment` VALUES ('1485288657161056257', '1482334670241763330', '', '1484454710336294913', 'compass', 'https://thirdwx.qlogo.cn/mmopen/vi_32/1JYibUaLyibKXk4VDEvDGyEUgFNAGrIHibRY4iatO3atSD1YERDS6qZbbbdibNpnsPqYF7kJxicAGtehHAAjiajrrict7g/132', '前置通知(before):在執行業務代碼前做些操作，比如獲取連接對象', '-1', 1, 2, 1, ',1191616288114163713,1484112436503019522', 0, '2022-01-23 16:29:45', '-1', NULL, '2022-01-24 10:36:47', '2022-01-23 16:29:46', 0);
INSERT INTO `edu_comment` VALUES ('1485348435136622593', '1482334670241763330', '', '1191616288114163713', '馬超', 'https://guli-edu-compass.oss-cn-hangzhou.aliyuncs.com/avatar/2022-01-16/g.png', 'Weaving（織入）：將 Aspect 和其他對象連接起來, 並創建 Adviced object 的過程', '1485288657161056257', 0, 2, 1, ',1191616288114163713,1484112436503019522', 0, '2022-01-23 20:27:18', '123963852741', 'compass', '2022-01-24 10:45:55', '2022-01-23 20:27:18', 0);
INSERT INTO `edu_comment` VALUES ('1485352669110349825', '1482334670241763330', '', '1191600824445046786', '司馬懿', '\r\nhttps://img-blog.csdnimg.cn/2df9541c7fd044ff992ff234a29ca444.png?x-oss-process=image/resize,m_fixed,h_300', 'before advice, 在 join point 前被執行的 advice. 雖然 before advice 是在 join point 前被執行, 但是它並不能夠阻止 join point 的執行, 除非發生瞭異常(即我們在 before advice 代碼中, 不能人為地決定是否繼續執行 join point 中的代碼)', '123963852741', 0, 2, 1, ',1191616288114163713,1484112436503019522', 0, '2022-01-23 20:44:07', '123963852743', '卡夫卡', '2022-01-24 10:47:37', '2022-01-23 20:44:07', 0);
INSERT INTO `edu_comment` VALUES ('1485606518391865345', '1482334670241763330', '', '1484112436503019522', '卡夫卡', 'https://guli-edu-compass.oss-cn-hangzhou.aliyuncs.com/avatar/2022-01-16/b80d2ab57bc0401db0aee83746e94b1d-file.png', 'js中對象是引用數據類型，如果隻是通過 objectB = objectA 簡單的賦值，objectA 和 objectB 指向的是同一個地址', '123963852741', 0, 0, 0, '0,0', 0, '2022-01-24 13:32:49', '123963852742', '馬超', '2022-01-24 13:32:50', '2022-01-24 13:32:50', 0);
SET FOREIGN_KEY_CHECKS = 1;
2.實體類
@Data
@ToString
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@ApiModel(value="EduComment對象", description="評論")
public class EduComment implements Serializable {
private static final long serialVersionUID = 1L;
@ApiModelProperty(value = "主鍵id")
@TableId(value = "id", type = IdType.ID_WORKER_STR)
private String id;
@ApiModelProperty(value = "課程id")
private String courseId;
@ApiModelProperty(value = "講師id")
private String teacherId;
@ApiModelProperty(value = "用戶id")
private String memberId;
@ApiModelProperty(value = "用戶昵稱")
private String name;
@ApiModelProperty(value = "用戶頭像")
private String avatar;
@ApiModelProperty(value = "評論內容")
private String content;
@ApiModelProperty(value = "父級評論id")
private String parentId;
@ApiModelProperty(value = "回復條數")
private Integer commentNum;
@ApiModelProperty(value = "點贊數量")
private Integer likeCount;
@ApiModelProperty(value = "是否點贊")
private Boolean isLike;
@ApiModelProperty(value = "點贊id列表")
private String likeListId;
@ApiModelProperty(value = "是否顯示輸入框")
private Boolean inputShow;
@ApiModelProperty(value = "評論創建時間")
private Date time;
@ApiModelProperty(value = "被回復的記錄id")
private String fromId;
@ApiModelProperty(value = "回復人名稱")
private String fromName;
@TableField(fill = FieldFill.INSERT_UPDATE)
@ApiModelProperty(value = "更新時間")
private Date gmtModified;
@ApiModelProperty(value = "創建時間")
@TableField(fill = FieldFill.INSERT)
private Date gmtCreate;
@TableLogic
@ApiModelProperty(value = "邏輯刪除 1（true）已刪除， 0（false）未刪除")
private Boolean isDeleted;
@ApiModelProperty(value = "回復列表")
@TableField(exist = false)
private List<EduComment> reply;
}
3.daoMapper
@Repository
public interface EduCommentMapper extends BaseMapper<EduComment> {
/**
* 根據課程id獲取到所有的評論列表
* @param courseId 課程id
* @return
*/
public List<EduComment> getAllCommentList(@Param("courseId") String courseId);
}
4.daoMapper實現
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="">
<resultMap id="ResultCommentList" type="EduComment">
<id property="id" column="id"/>
<result property="courseId" column="course_id"/>
<result property="teacherId" column="teacher_id"/>
<result property="memberId" column="member_id"/>
<result property="name" column="name"/>
<result property="avatar" column="avatar"/>
<result property="content" column="content"/>
<result property="parentId" column="parent_id"/>
<result property="commentNum" column="comment_num"/>
<result property="likeCount" column="like_count"/>
<result property="isLike" column="is_like"/>
<result property="likeListId" column="like_list_id"/>
<result property="inputShow" column="input_show"/>
<result property="fromId" column="from_id"/>
<result property="fromName" column="from_name"/>
<result property="time" column="time"/>
<result property="gmtModified" column="gmt_modified"/>
<result property="gmtCreate" column="gmt_create"/>
<result property="isDeleted" column="is_deleted"/>
<collection property="reply" ofType="EduComment" column="id" select="getReplyList">
</collection>
</resultMap>
<select id="getAllCommentList" resultMap="ResultCommentList" parameterType="String">
SELECT
id, course_id, teacher_id, member_id, name, avatar, content, parent_id,
comment_num, like_count, is_like, like_list_id, input_show, time,
from_id, from_name, gmt_modified, gmt_create, is_deleted
FROM
edu_comment
WHERE
parent_id = '-1'
AND course_id = #{courseId} AND is_deleted!=1;
</select>
<select id="getReplyList" resultMap="ResultCommentList">
select
id, course_id, teacher_id, member_id, name, avatar, content, parent_id,
comment_num, like_count, is_like, like_list_id, input_show, time,
from_id, from_name, gmt_modified, gmt_create, is_deleted
from edu_comment
where parent_id=#{id} AND is_deleted!=1;
</select>
</mapper>
5.service接口
public interface EduCommentService extends IService<EduComment> {
/**
* 根據課程id獲取到所有的評論列表
* @param courseId 課程id
* @return
*/
public List<EduComment> getAllCommentList(@Param("courseId") String courseId);
/**
* 根據評論id刪除一條記錄[是本人評論的記錄]
* @param comment 評論對象中包含回復人的id也包含被回復人的id
* @return
*/
public Integer deleteCommentById(EduComment comment);
/**
* 添加一條評論或回復記錄
* @param current 當前提交的新comment對象
* @param parent 當前被點擊回復的對象[評論時不需要，回復需要根據他進行判斷]
* @param token 根據request對象取到token獲取用戶信息
* @return
*/
int addComment(EduComment current,EduComment parent, HttpServletRequest token);
/**
* 修改點贊數量
* @param eduComment 評論對象
* @return
*/
public int updateLikeCount(EduComment eduComment);
}
6.service接口實現
@Service
public class EduCommentServiceImpl extends ServiceImpl<EduCommentMapper, EduComment> implements EduCommentService {
@Autowired
private EduCommentMapper eduCommentMapper;
@Autowired
private UserCenterClient userCenterClient;
@Override
public List<EduComment> getAllCommentList(String courseId) {
return eduCommentMapper.getAllCommentList(courseId);
}
@Override
@Transactional
public Integer deleteCommentById(EduComment comment) {
int deleteCount=1;
try {
// 先查詢該評論是不是一條頂級評論
QueryWrapper<EduComment> isParentWrapper = new QueryWrapper<>();
isParentWrapper.eq("id",comment.getId());
isParentWrapper.eq("parent_id",-1);
Integer count = eduCommentMapper.selectCount(isParentWrapper);
// 如果count大於0說明該評論是一條頂級評論，先刪除他的子級評論
if (count>=0){
QueryWrapper<EduComment> wrapper = new QueryWrapper<>();
wrapper.eq("parent_id",comment.getId());
eduCommentMapper.delete(wrapper);
}
// 最後再刪除父級評論
QueryWrapper<EduComment> wrapper = new QueryWrapper<>();
wrapper.eq("member_id",comment.getMemberId());
wrapper.eq("id",comment.getId());
eduCommentMapper.delete(wrapper);
// 找到該記錄的頂級評論讓他的評論數-1
String parentId = comment.getParentId();
String fromId = comment.getFromId();
if (!StringUtils.isEmpty(parentId) && parentId.equals(fromId)){
EduComment eduComment = this.getById(parentId);
if (eduComment!=null){
eduComment.setCommentNum(eduComment.getCommentNum()-1);
this.updateLikeCount(eduComment);
}
}
// 考慮到不是頂級記錄的直接子記錄的情況 fromId:表示該記錄回復的是那一條記錄
if (!StringUtils.isEmpty(parentId) && !parentId.equals(fromId)){
// 更新他的直接父級
EduComment father = this.getById(fromId);
if (father!=null){
father.setCommentNum(father.getCommentNum()-1);
this.updateLikeCount(father);
}
// 更新他的跟節點評論數量
EduComment root = this.getById(parentId);
if (root!=null){
root.setCommentNum(root.getCommentNum()-1);
this.updateLikeCount(root);
}
}
}catch (Exception e){
e.printStackTrace();
deleteCount = -1;
}
return deleteCount ;
}
@Override
@Transactional
public int addComment(EduComment current, EduComment parent ,HttpServletRequest token) {
// mybatis-plus總是出現邏輯刪除修改返回的影響條數為0的情況，所有進行異常捕捉，捕捉到異常返回-1表示失敗
try {
if (StringUtils.isEmpty(token)){
throw new GuLiException(20001,"對不起!添加失敗");
}
// 從請求頭中根據token獲取用戶id
String result = JwtUtils.getMemberIdByJwtToken(token);
if (result.equals("error")){
throw new GuLiException(20001,"登錄時長過期，請重新登錄");
}
// 是一條頂級評論，直接進行添加操作 如果他的parentId=-1那就是頂級評論[發表評論]
if (current!=null && !StringUtils.isEmpty(current.getParentId()) && current.getParentId().equals("-1")){
// 如果從token中解析出來的memberId等於提交數據中MemberId就評論成功，否則失敗
if (result.equals(current.getMemberId())){
return eduCommentMapper.insert(current);
}
}
// 如果能直接到這裡，說明是一條回復評論
if (parent!=null && StringIsEmpty.isEmpty(parent.getId(),parent.getParentId())){
// 修改當前被回復的記錄的總回復條數+1 [前端傳遞過來的時候已經+1，直接按照id修改即可]
this.updateLikeCount(parent);
// 根據parentId查詢一條記錄
EduComment root = this.getById(parent.getParentId());
if (root!=null && root.getParentId().equals("-1")){
// 根據當前被回復的記錄找到頂級記錄，將頂級記錄也+1
root.setCommentNum(root.getCommentNum()+1);
this.updateLikeCount(root);
}
// 如果從token中解析出來的memberId等於提交數據中MemberId就評論成功，否則失敗
if (result.equals(current.getMemberId())){
return eduCommentMapper.insert(current);
}
}
}catch (Exception e){
e.printStackTrace();
return -1;
}
return -1;
}
@Override
public int updateLikeCount(EduComment eduComment) {
return eduCommentMapper.updateById(eduComment);
}
}
7.controller
@Api(value = "EduCommentController",description = "前臺評論控制器")
@CrossOrigin
@RestController
@RequestMapping("/serviceedu/edu-comment")
public class EduCommentController {
@Autowired
private EduCommentService eduCommentService;
@GetMapping("getCommentList/{courseId}")
@ApiOperation(value = "根據課程id查詢評論信息",notes = "傳入課程id")
public R getCommentList(@PathVariable String courseId){
return R.ok().data("commentList",eduCommentService.getAllCommentList(courseId));
}
@DeleteMapping("deleteCommentById")
@ApiOperation(value = "根據評論id刪除一條記錄",notes = "被點擊的當前記錄對象")
public R deleteCommentById(@RequestBody EduComment comment){
int updateCount = eduCommentService.deleteCommentById(comment);
return updateCount !=-1 ?R.ok():R.error();
}
@PostMapping("addComment")
@ApiOperation(value = "添加一條評論記錄",notes = "json類型的評論對象")
public R addComment(@RequestBody Map<String,EduComment> map,HttpServletRequest token){
EduComment parent = map.get("parent");
EduComment current = map.get("current");
int updateCount = eduCommentService.addComment(current,parent,token);
return updateCount!=-1?R.ok():R.error();
}
@PostMapping("updateLikeCount")
@ApiOperation(value = "修改點贊數量",notes = "傳遞完整的EduComment對象")
public R updateLikeCount(@RequestBody EduComment comment){
int updateLikeCount = eduCommentService.updateLikeCount(comment);
return updateLikeCount>0?R.ok():R.error();
}
}
以上就是Springboot+ElementUi實現評論、回復、點贊功能的詳細內容，更多關於Springboot ElementUi的資料請關註WalkonNet其它相關文章！
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