下面是“Springboot+ElementUi实现评论、回复、点赞功能”的完整攻略：
简介
本文将介绍如何使用Spring Boot和ElementUi实现评论、回复、点赞功能。在本文中，我们将使用Spring Boot作为后端框架，使用ElementUi作为前端框架。
技术栈
- 前端技术：Vue.js、ElementUi、Axios
- 后端技术：Spring Boot、Spring Data JPA、MySQL
实现思路
- 使用Spring Boot开发后端接口，提供前后端数据传输和持久化能力
- 使用Vue.js和ElementUi开发前端界面，实现评论、回复、点赞功能
- 在后端使用Spring Boot提供的RESTful API，前端使用Axios访问API，实现前后端数据交互
开始项目
前端项目初始化
- 初始化项目
vue init webpack my-project
- 安装项目依赖
npm install
- 安装ElementUi和Axios
npm install element-ui axios --save
后端项目初始化
-
使用Spring Initializr生成新项目，添加JPA、MySQL、Web依赖。
-
修改项目配置
在application.yml文件中添加MySQL连接信息
spring:
datasource:
url: jdbc:mysql://localhost:3306/dbname
username: username
password: password
实现评论功能
- 在后端创建实体类
Comment，并使用JPA注解创建数据表。
@Entity
@Table(name = "comments")
public class Comment {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(nullable = false)
private String content;
@Column(name = "create_time")
private Date createTime;
// 其他字段省略
// getter和setter方法省略
}
- 创建后端
CommentController类，提供CRUD操作的REST接口。
@RestController
@RequestMapping("/api")
public class CommentController {
@Autowired
private CommentRepository commentRepository;
@PostMapping("/comments")
public Comment createComment(@RequestBody Comment comment) {
comment.setCreateTime(new Date());
return commentRepository.save(comment);
}
@GetMapping("/comments")
public List<Comment> getComments() {
return commentRepository.findAll();
}
// 其他操作省略
}
- 创建前端
CommentList组件，使用ElementUi的表单和列表组件。
<template>
<div>
<el-form ref="form" :model="comment" label-width="80px">
<el-form-item label="内容">
<el-input v-model="comment.content"></el-input>
</el-form-item>
<el-form-item>
<el-button type="primary" @click="onSubmit">发表评论</el-button>
</el-form-item>
</el-form>
<el-divider></el-divider>
<el-list>
<el-list-item v-for="(comment, index) in comments" :key="index">
<el-card>
<div slot="header">
<span>{{comment.createTime}}</span>
<el-button type="text" size="mini" @click="onLike(index)">{{comment.likeNum}} 赞</el-button>
</div>
<p>{{comment.content}}</p>
</el-card>
</el-list-item>
</el-list>
</div>
</template>
<script>
import axios from 'axios'
export default {
name: 'CommentList',
data() {
return {
comment: {},
comments: []
}
},
methods: {
getComments() {
axios.get('/api/comments').then(response => {
this.comments = response.data
})
},
createComment(comment) {
axios.post('/api/comments', comment).then(response => {
this.getComments()
this.comment = {}
})
},
onSubmit() {
this.createComment(this.comment)
},
onLike(index) {
const comment = this.comments[index]
comment.likeNum++
axios.put(`/api/comments/${comment.id}`, comment)
}
},
mounted() {
this.getComments()
}
}
</script>
实现回复和点赞功能
- 在后端创建实体类
Reply，并使用JPA注解创建数据表，关联Comment实体。
@Entity
@Table(name = "replies")
public class Reply {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(nullable = false)
private String content;
@Column(name = "create_time")
private Date createTime;
// 其他字段省略
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "comment_id", nullable = false)
private Comment comment;
// getter和setter方法省略
}
- 修改
Comment实体，添加与Reply实体的关联。
@Entity
@Table(name = "comments")
public class Comment {
@OneToMany(mappedBy = "comment", cascade = CascadeType.ALL)
private List<Reply> replies;
// 其他字段省略
// getter和setter方法省略
}
- 在
CommentController中添加处理回复的REST接口。
@RestController
@RequestMapping("/api")
public class CommentController {
// 其他接口省略
@PostMapping("/comments/{id}/replies")
public Reply createReply(@PathVariable("id") Long commentId, @RequestBody Reply reply) {
Comment comment = commentRepository.getById(commentId);
reply.setCreateTime(new Date());
reply.setComment(comment);
return replyRepository.save(reply);
}
}
- 在
CommentList组件中添加回复和点赞功能。
<template>
<div>
<el-form ref="form" :model="comment" label-width="80px">
<el-form-item label="内容">
<el-input v-model="comment.content"></el-input>
</el-form-item>
<el-form-item>
<el-button type="primary" @click="onSubmit">发表评论</el-button>
</el-form-item>
</el-form>
<el-divider></el-divider>
<el-list>
<el-list-item v-for="(comment, index) in comments" :key="index">
<el-card>
<div slot="header">
<span>{{comment.createTime}}</span>
<el-button type="text" size="mini" @click="onLike(index)">{{comment.likeNum}} 赞</el-button>
</div>
<p>{{comment.content}}</p>
<el-divider></el-divider>
<el-form ref="replyForm" :model="reply" label-width="80px">
<el-form-item label="回复">
<el-input v-model="reply.content"></el-input>
</el-form-item>
<el-form-item>
<el-button type="primary" @click="onReply(index)">回复</el-button>
</el-form-item>
</el-form>
<el-divider></el-divider>
<el-list>
<el-list-item v-for="(reply, index) in comment.replies" :key="index">
<el-card>
<div slot="header">
<span>{{reply.createTime}}</span>
</div>
<p>{{reply.content}}</p>
</el-card>
</el-list-item>
</el-list>
</el-card>
</el-list-item>
</el-list>
</div>
</template>
<script>
import axios from 'axios'
export default {
name: 'CommentList',
data() {
return {
comment: {},
comments: [],
reply: {}
}
},
methods: {
getComments() {
axios.get('/api/comments').then(response => {
this.comments = response.data
})
},
createComment(comment) {
axios.post('/api/comments', comment).then(response => {
this.getComments()
this.comment = {}
})
},
createReply(commentIndex, reply) {
const comment = this.comments[commentIndex]
axios.post(`/api/comments/${comment.id}/replies`, reply).then(response => {
this.getComments()
this.reply = {}
this.$message.success('回复成功')
})
},
onSubmit() {
this.createComment(this.comment)
},
onReply(index) {
this.createReply(index, this.reply)
},
onLike(index) {
const comment = this.comments[index]
comment.likeNum++
axios.put(`/api/comments/${comment.id}`, comment)
}
},
mounted() {
this.getComments()
}
}
</script>
以上就是“Springboot+ElementUi实现评论、回复、点赞功能”的完整攻略，包含了评论、回复、点赞功能的实现和部分代码示例。
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