一.新建Vue项目和SpringBoot项目
新建Vue项目
新建文件夹SpringBoot-Vue-MessageBoard创建Vue项目使用vue ui命令(需要vue 3.0选择刚才的目录 名字为Vue创建后V还是小写 创建后可以改为大写 取消git初始化 手动配置 取消 打开 创建项目，不保存预设
新建SpringBoot项目
用IDEA打开SpringBoot-Vue-MessageBoard这个目录 创建SpringBoot项目右键 选择Spring Initializr 选择这四个 名字改为SpringBoot
二. 后端
配置application.properties
#Mysql
spring.datasource.url=jdbc:mysql://localhost:3306/enaium?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.show-sql= true
spring.jpa.properties.hibernate.format_sql = true
#Server
server.port=8181
写实体类
package cn.enaium.message.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import javax.persistence.Entity;
import javax.persistence.Id;
/**
* Project: message
* -----------------------------------------------------------
* Copyright ? 2020 | Enaium | All rights reserved.
*/
@Data
@Entity
@NoArgsConstructor
@AllArgsConstructor
public class Message {
@Id
private Long id;
private String author;
private String message;
private String time;
}
实体类Jpa
package cn.enaium.message.repository;
import cn.enaium.message.entity.Message;
import org.springframework.data.jpa.repository.JpaRepository;
/**
* Project: message
* -----------------------------------------------------------
* Copyright ? 2020 | Enaium | All rights reserved.
*/
public interface MessageRepository extends JpaRepository<Message, Long> {
}
Controller
package cn.enaium.message.controller;
import cn.enaium.message.entity.Message;
import cn.enaium.message.repository.MessageRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
/**
* Project: message
* -----------------------------------------------------------
* Copyright ? 2020 | Enaium | All rights reserved.
*/
@RestController
public class Controller {
@Autowired
private MessageRepository messageRepository;
@RequestMapping("/getMessages")
private List<Message> getMessages() {
return messageRepository.findAll();//遍历所有留言
}
@GetMapping("/postMessage")
private String postMessage(@RequestParam String author, @RequestParam String message) {
if(author.replaceAll(" ","").equals("") || message.replaceAll(" ","").equals("")) {
return "filed";
}//判断名字和留言是否为空
messageRepository.save(new Message((long) (messageRepository.findAll().size() + 1),author,message,new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())));//保存留言到数据库
return "success";
}
}
解决跨源请求问题
package cn.enaium.message.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* Project: message
* -----------------------------------------------------------
* Copyright ? 2020 | Enaium | All rights reserved.
*/
@Configuration
public class CorsConfig implements WebMvcConfigurer {
@Override//重写这个方法
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedOrigins("*")
.allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
.allowCredentials(true)
.maxAge(3600)
.allowedHeaders("*");
}
}
三. 前端
安装插件axios和Element UI
写Home页面
<template>
<div>
<h1>留言版</h1>
<el-input
type="text"
placeholder="请输入你的名字"
v-model="messageBoard.author"
maxlength="16"
show-word-limit
>
</el-input>
<div style="margin: 20px 0;"></div>
<el-input
type="textarea"
placeholder="请输入留言"
v-model="messageBoard.message"
show-word-limit
>
</el-input>
<div style="margin: 20px 0;"></div>
<el-button type="primary" plain @click="postMessage">留言</el-button>
<el-divider></el-divider>
<el-table
:data="messages"
height="250"
border
style="width: 100%">
<el-table-column
prop="id"
label="序号"
width="100">
</el-table-column>
<el-table-column
prop="author"
label="名字">
</el-table-column>
<el-table-column
prop="message"
label="留言">
</el-table-column>
<el-table-column
prop="time"
label="时间"
width="160">
</el-table-column>
</el-table>
<el-link type="primary" href="https://github.com/Enaium">By Enaium</el-link>
</div>
</template>
<script>
export default {
name: "Home",
data() {
return {
messageBoard: {
author: '',
message: ''
},
messages: []
}
},
methods: {
postMessage() {
if (this.messageBoard.author === '') {
this.$message.error('请输入你的名字');
return
}
if (this.messageBoard.message === '') {
this.$message.error('请输入留言');
return
}
axios.get("http://localhost:8181/postMessage?author=" + this.messageBoard.author + "&message=" + this.messageBoard.message).then((t) => {
if (t.data === 'success') {
this.$message({
message: '留言成功',
type: 'success'
});
} else {
this.$message.error('留言失败');
}
})
}
},
created() {
axios.get("http://localhost:8181/getMessages").then((t) => {
this.messages = t.data
})
}
}
</script>
路由页面
import Vue from 'vue'
import VueRouter from 'vue-router'
import Home from '../views/Home.vue'
Vue.use(VueRouter)
const routes = [
{
path: '/',
name: 'Home',
component: Home
}
]
const router = new VueRouter({
mode: 'history',
routes
})
export default router
四. 运行
运行SpringBootcd 到Vue使用npm run serve运行