spring-boot react如何一步一步实现增删改查

 1、maven继承spring-boot

<parent>
	<groupid>org.springframework.boot</groupid>
	<artifactid>spring-boot-starter-parent</artifactid>
	<version>2.0.6.release</version>
	<relativepath/> <!-- lookup parent from repository -->
</parent>

2、指定jdk版本和字符集

<properties>
	<project.build.sourceencoding>utf-8</project.build.sourceencoding>
	<project.reporting.outputencoding>utf-8</project.reporting.outputencoding>
	<java.version>1.8</java.version>
</properties>

3、添加依赖

<dependencies>
	<dependency>
		<groupid>org.springframework.boot</groupid>
		<artifactid>spring-boot-starter-web</artifactid>
	</dependency>
	<dependency>
		<groupid>org.springframework.boot</groupid>
		<artifactid>spring-boot-starter-test</artifactid>
		<scope>test</scope>
	</dependency>
	<dependency>
		<groupid>org.springframework.boot</groupid>
		<artifactid>spring-boot-starter-data-jpa</artifactid>
	</dependency>
	<dependency>
		<groupid>mysql</groupid>
		<artifactid>mysql-connector-java</artifactid>
	</dependency>
    <dependency>
      <groupid>com.alibaba</groupid>
      <artifactid>druid</artifactid>
      <version>1.1.10</version>
    </dependency>
    <dependency>
      <groupid>org.projectlombok</groupid>
      <artifactid>lombok</artifactid>
    </dependency>
	<dependency>
		<groupid>org.apache.commons</groupid>
		<artifactid>commons-text</artifactid>
		<version>1.2</version>
	</dependency>
</dependencies>

4、添加插件

<plugin>
	<groupid>org.springframework.boot</groupid>
	<artifactid>spring-boot-maven-plugin</artifactid>
</plugin>

5、配置src/main/resources/application.yml

spring:
 datasource:
  driver-class-name: com.mysql.jdbc.driver
  url: jdbc:mysql://localhost:3306/react
  username: root
  password: 123456
  type: com.alibaba.druid.pool.druiddatasource
 jpa:
  show-sql: true
  hibernate:
   ddl-auto: update
  database: mysql
  database-platform: org.hibernate.dialect.mysql5innodbdialect

6、编写启动类

package com.example.react;

import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;

@springbootapplication
public class reactapplication {

	public static void main(string[] args) {
		springapplication.run(reactapplication.class, args);
	}
}

7、持久化对象类

package com.example.react.model;

import lombok.*;
import lombok.experimental.accessors;

import javax.persistence.*;

/**
 * 用户类
 */
@table(name = "t_user")
@entity
@setter
@getter
@noargsconstructor
@allargsconstructor
@tostring
@accessors(chain = true)
public class user {
  /**
   * 用户id
   */
  @id
  @generatedvalue(strategy = generationtype.identity)
  private long id;
  /**
   * 用户名
   */
  private string name;
}

8、持久化操作接口

package com.example.react.dao;

import com.example.react.model.user;
import org.springframework.data.jpa.repository.jparepository;
import org.springframework.stereotype.repository;

@repository
public interface userdao extends jparepository<user,long> {


}

9、控制层

package com.example.react.controller;

import com.example.react.model.user;
import com.example.react.dao.userdao;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.web.bind.annotation.*;

import java.util.list;

@restcontroller
@requestmapping("/user")
public class usercontroller {

  @autowired
  private userdao userdao;

  /**
   * 查询所有用户
   * @return
   */
  @getmapping
  public list<user> all(){
    return this.userdao.findall();
  }

  /**
   * 保存用户
   * 新增或更新
   * @param user
   * @return
   */
  @postmapping
  public object save(@requestbody user user){
    this.userdao.save(user);
    return true;
  }

  /**
   * 根据id删除用户
   * @param id
   * @return
   */
  @deletemapping("/{id}")
  public object delete(@pathvariable long id){
    this.userdao.deletebyid(id);
    return true;
  }
}

10、启动后台项目

11、在项目根路径创建前端项目，使用create-react-app

npx create-react-app web

给命令会在当前目录下使用create-react-app创建一个react单页项目

12、进入web目录，添加依赖库

 npm install axios bootstrap@3.3.7 --save

13、在package.json中增加前后端交互代理

"proxy": http://localhost:8080

14、删除前端项目src 目录下无用的文件，只保留index.js和app.js，并修改文件使其能够运行

目录结构

index.js

import react from 'react';
import reactdom from 'react-dom';
import app from './app';

reactdom.render(<app />, document.getelementbyid('root'));

app.js

import react, { component } from 'react';

class app extends component {
 render() {
  return (
   <div>
    
   </div>
  );
 }
}

export default app;

15、在index.js中引入bootstrap样式文件

注意：这里只需要引入css文件即可

import react from 'react';
import reactdom from 'react-dom';
import 'bootstrap/dist/css/bootstrap.min.css';
import app from './app';

reactdom.render(<app />, document.getelementbyid('root'));

16、接下来进行页面布局，这是一个简单的增删改查功能，所以只需要在一个页面编写全部功能即可，左侧为一个表格，右侧为一个表单，如下图

17、首先利用bootstrap中提供的栅格模式，将页面分为左右两栏，两栏中分别有一个panel

render() {
  return (
    <div classname="container-fluid" style={{margintop: '20px'}}>
      <div classname="row">
        <div classname="col-xs-4 col-xs-offset-1">
          <div classname="panel panel-default">
            <div classname="panel-body">
              表格区域
            </div>
          </div>
        </div>
        <div classname="col-xs-3 col-xs-offset-1">
          <div classname="panel panel-default">
            <div classname="panel-body">
              表单区域
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}

18、添加表格

<table classname="table table-bordered">
 <thead>
  <tr>
    <th>id</th>
    <th>用户名</th>
    <th>操作</th>
  </tr>
  </thead>
  <tbody>

  </tbody>
</table>

19、添加表单

<form classname="form-horizontal">
  <div classname="form-group">
    <label htmlfor="name" classname="col-xs-3">用户名</label>
    <div classname="col-xs-8">
      <input type="text" id="name" classname="form-control"/>
    </div>
  </div>
  <div classname="form-group">
    <div classname="col-sm-offset-2 col-sm-10">
      <button classname="btn btn-default">提交</button>
    </div>
  </div>
</form>

20、初始化 state

constructor(props) {
  super(props);
  this.state = {
    id:'',
    name:'',
    list:[]
  }
}

21、实现查询函数，并在app组件挂载渲染完成后执行查询函数

引入axios

import axios from 'axios';

声明查询函数

query = () =>{
	axios.get('/user').then(({data})=>{
		this.setstate({
			list:data	
		});
	});
}

组件挂载完成后执行查询函数

componentdidmount(){
	this.query();
}

22、向表格中填充数据

<tbody>
{
  this.state.list.map(item=>{
    return (
      <tr key={item.id}>
        <td>{item.id}</td>
        <td>{item.name}</td>
        <td>
          <button classname="btn btn-primary">修改</button>
          <button classname="btn btn-danger" style={{marginleft:'5px'}}>删除</button>
        </td>
      </tr>
    )
  })
}
</tbody>

23、对表单中的文本框和提交按钮进行控制

文本框

<input type="text" id="name" classname="form-control" value={this.state.name} onchange={
  (e)=>{
    this.setstate({
      name:e.target.value
    })
  }
}/>

提交按钮点击事件

<button classname="btn btn-default" onclick={this.handleformsubmit}>提交</button>

点击事件函数

handleformsubmit = (e) => {
  e.preventdefault();
  if (this.state.name != '') {
    axios.post('/user', {
      id: !this.state.id ? '' : this.state.id,
      name: this.state.name
    }).then(({data}) => {
      this.setstate({
        id: '',
        name: ''
      });
      this.query();
    })
  }
}

24、对表格中每一行的修改和删除按钮进行事件处理

<button classname="btn btn-primary" onclick={() => {
   this.setstate({id: item.id, name: item.name})
 }}>修改
 </button>
 <button classname="btn btn-danger" style={{marginleft: '5px'}}
     onclick={() => {
       this.deleteitem(item)
     }}>删除
 </button>

删除操作函数

deleteitem = (item) => {
  axios.delete(`/user/${item.id}`).then(({data}) => {
    this.query();
  })
}

25、执行npm start启动前端

26、表单数据居中显示添加app.css

.table th, .table td {
  text-align: center;
  vertical-align: middle!important;
}

app.js中引入app.css

import './app.css'

源码地址：

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