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vue前后端分离实现功能：员工的增删改（先实现数据回显之后，再进行修改）查

一、SpringBoot环境搭建

1、项目的数据库

/*
 Navicat Premium Data Transfer

 Source Server         : windows
 Source Server Type    : MySQL
 Source Server Version : 80022
 Source Host           : localhost:3306
 Source Schema         : ems

 Target Server Type    : MySQL
 Target Server Version : 80022
 File Encoding         : 65001

 Date: 19/12/2021 16:27:43
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for t_emp
-- ----------------------------
DROP TABLE IF EXISTS `t_emp`;
CREATE TABLE `t_emp`  (
  `id` int NOT NULL AUTO_INCREMENT,
  `name` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
  `salary` double NOT NULL,
  `age` int NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 8 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of t_emp
-- ----------------------------
INSERT INTO `t_emp` VALUES (2, '杨福君', 9000, 19);
INSERT INTO `t_emp` VALUES (6, '邓正武', 18000, 25);
INSERT INTO `t_emp` VALUES (8, '王恒杰', 12000, 21);
INSERT INTO `t_emp` VALUES (9, '张西', 8000, 20);

SET FOREIGN_KEY_CHECKS = 1;

2、项目所需依赖

<!--继承springboot的父项目 ,放在dependencies平级下-->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.5.RELEASE</version>
  </parent>
  <dependencies>
    <!--springboot依赖-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>2.1.2</version>
    </dependency>

    <!--引入springboot的web支持-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!--mysql-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.16</version>
    </dependency>

    <!--数据源连接池-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.12</version>
    </dependency>

    <!--引入springboot的test支持-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
    </dependency>

  </dependencies>


</project>

3、application.yml文件

server:
  port: 8080
  servlet:
    context-path: /ems
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource  #数据源类型
    driver-class-name: com.mysql.cj.jdbc.Driver   #加载驱动
    url: jdbc:mysql://localhost:3306/ems?useSSL=false&serverTimezone=UTC
    username: root
    password: root
mybatis:
  mapper-locations: classpath:com/tjcu/mapper/*Mapper.xml #指定mapper文件所在的位置,其中classpath必须和mapper-locations分开
  type-aliases-package: com.tjcu.entity

4、入口类

@SpringBootApplication
@MapperScan("com.tjcu.dao")
public class EmpApplication {
    public static void main(String[] args) {
        SpringApplication.run(EmpApplication.class,args);
    }
}

二、vue实现前后端分离

1、前端页面

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>emp manager</title>
</head>
<body>
<div id="app">
  <center><h2>{{msg}}</h2></center>
  <hr/>
  <center>
    <form>
      编号：<input type="text" v-model="emp.id" placeholder="添加默认为null"/><br/>
      名称：<input type="text" v-model="emp.name"/><br/>
      薪资：<input type="text" v-model="emp.salary"/><br/>
      年龄：<input type="text" v-model="emp.age"/><br/>
      <input type="button" value="添加/修改" @click="add()"/>
      <br/>
      <br/>
      <br/>
    </form>
  </center>
  <table border="1" cellspacing="0" cellpadding="0" width="80%" align="center">
    <tr>
      <td>编号</td>
      <td>名称</td>
      <td>年龄</td>
      <td>薪资</td>
      <td>操作</td>
    </tr>
    <tr v-for="(emp,index) in emps">
      <td>{{index+1}}</td>
      <td>{{emp.name}}</td>
      <td>{{emp.salary}}</td>
      <td>{{emp.age}}</td>
      <td><input type="button" value="删除" @click="del(emp.id)">
          <input type="button" value="修改" @click="queryOne(emp.id)"></td>
    </tr>
  </table>
</div>
</body>
</html>
<script src="js/vue-min.js"></script>
<script src="js/axios.min.js"></script>
<script>
  new Vue({
    el:"#app" , //指定vue实例的作用范围
    data:{     //定义数据
      msg:"ems员工管理系统",
      emps:[],
      emp:{}
    },
    methods:{   //定义函数
       queryAll(){
         var vue=this;
         axios.get("http://localhost:8080/ems/emp/queryall")
         .then(function (response) {
           console.log(response.data);
           vue.emps = response.data;
         }).catch(function (error) {
           console.log(error.data);
         })
       },
      add(){
         var vue=this;
        console.log(vue.emp);
        axios.post("http://localhost:8080/ems/emp/add",vue.emp)
        .then(function () {
          vue.queryAll();
          console.log("添加成功");
          vue.emp={};
        })
        .catch(function () {
          console.log("添加失败")
        })
      },
      queryOne(id){
         if(window.confirm("你确定修改吗？")){
           var  vue=this;
           axios.get("http://localhost:8080/ems/emp/queryOne?id="+id)
                   .then(function (response) {
                     //将查询的结果嫁给vue中的emp进行管理 根据双向绑定原理 emp数据变化 会影响页面 从而在表单中展示当前员工
                     vue.emp=response.data;
                     console.log("查询成功");
                   }).catch(function () {
             console.log("查询失败")
           })
         }
      },
      del(id){
         if(window.confirm("你确定删除吗？")){
           var  vue=this;
           axios.get("http://localhost:8080/ems/emp/delete?id="+id)
           .then(function () {
             vue.queryAll();
             console.log("删除成功")
           }).catch(function () {
             console.log("删除失败")
           })
         }
      }
    },
    created(){
        this.queryAll();
    }
  })
</script>

2、springBoot控制层

/**
 * @author 王恒杰
 * @date 2021/12/17 15:52
 * @Description:
 */
@Controller
@CrossOrigin
@ResponseBody
public class EmpController {
    @Autowired
    private EmpService empService;

    @RequestMapping("/emp/queryall")
    public  List<Emp> queryall(){
        List<Emp> emps = empService.showEmp();
        return emps;
    }

    /**
     * 删除
     * @param id
     */
    @RequestMapping("/emp/delete")
    public void delete(Integer id){
        empService.deleteById(id);
    }
    @RequestMapping("/emp/add")
    public void add(@RequestBody Emp emp){
        if(emp.getId()!=0){
            empService.updateEmp(emp);
        }else {
            emp.setId(null);
            empService.insertEmp(emp);
        }
    }

    @RequestMapping("/emp/queryOne")
    public Emp query(Integer id){
        Emp emp = empService.selectEmpById(id);
        return emp;
    }
}

3、mapper文件

<mapper namespace="com.tjcu.dao.EmpDao">

    <insert id="insertEmp">
        insert into t_emp
        values (#{id}, #{name}, #{salary}, #{age})
    </insert>

    <select id="showEmp" resultType="emp">
        select *
        from t_emp
    </select>

    <update id="updateEmp">

        update t_emp
        <set>
            <if test="name!=null">
                name=#{name},
            </if>
            <if test="salary!=null">
                salary=#{salary},
            </if>
            <if test="age!=null">
                age=#{age}
            </if>
        </set>
        where id=#{id}
    </update>

    <delete id="deleteById">
        delete from t_emp where id=#{id}
    </delete>
    <select id="selectEmpById" resultType="emp">
        select *
        from t_emp where id=#{id}
    </select>

</mapper>

3、项目完整源代码

gitee开源：https://gitee.com/wanghengjie563135/springboot_mybatis_vue.git

# spring boot # vue.js # java
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