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SpringBoot整合MyBatis实现增删改查案例完整版（附源代码）

来源：SegmentFault

时间：2023-02-24 19:26:11 216浏览收藏

本篇文章主要是结合我之前面试的各种经历和实战开发中遇到的问题解决经验整理的，希望这篇《SpringBoot整合MyBatis实现增删改查案例完整版（附源代码）》对你有很大帮助！欢迎收藏，分享给更多的需要的朋友学习~

1.Spring Boot是一个简化Spring开发的框架。用来监护spring应用开发，约定大于配置，去繁就简，just run 就能创建一个独立的，产品级的应用。

我们在使用Spring Boot时只需要配置相应的Spring Boot就可以用所有的Spring组件，简单的说，spring boot就是整合了很多优秀的框架，不用我们自己手动的去写一堆xml配置然后进行配置。从本质上来说，Spring Boot就是Spring,它做了那些没有它你也会去做的Spring Bean配置。
闲话少说，上图文：

2.开始

新建一个项目

选择Spring Initializr项目

创建项目的文件结构以及jdk的版本，本次以demo为例

选择项目所需要的依赖

修改项目名，finish完成，本次选择为修改

来看一眼pom文件

4.0.0org.springframework.bootspring-boot-starter-parent2.2.5.RELEASEcom.exampledemo0.0.1-SNAPSHOTdemoDemo project for Spring Boot1.8org.springframework.bootspring-boot-starter-jdbcorg.springframework.bootspring-boot-starter-weborg.mybatis.spring.bootmybatis-spring-boot-starter2.1.1mysqlmysql-connector-javaruntimeorg.springframework.bootspring-boot-starter-testtestorg.junit.vintagejunit-vintage-engineorg.springframework.bootspring-boot-maven-plugin

修改配置文件本，文不使用application.properties文件而使用更加简洁的application.yml文件。

修改为application.yml
内容：

server:
  port: 8080

spring:
  datasource:
    username: root
    password: root
    url: jdbc:mysql://localhost:3306/springboot?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC
    driver-class-name: com.mysql.cj.jdbc.Driver

mybatis:
  mapper-locations: classpath:mapping/*Mapper.xml
  type-aliases-package: com.example.entity.demo

logging:
  level:
    com:
      example:
        mapper : debug

创建表：

DROP TABLE IF EXISTS `user`;
CREATE TABLE `user`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
  `password` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
  `address` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 4 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;

目录结构：

UserController.java

package com.example.demo.controller;

import com.example.demo.entity.User;
import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.*;

/**
 * @author yn2333
 * @Date 2020/03/03
 */

@RestController
@RequestMapping("/test")
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping(value = "/selectUserByid", produces = "application/json;charset=UTF-8", method = RequestMethod.GET)
    @ResponseBody
    public String GetUser(User user){
        return userService.Sel(user).toString();
    }

    @RequestMapping(value = "/add", produces = "application/json;charset=UTF-8", method = RequestMethod.GET)
    public String Add(User user){
           return userService.Add(user);
    }

    @RequestMapping(value = "/update", produces = "application/json;charset=UTF-8", method = RequestMethod.GET)
    public String Update(User user){
        return userService.Update(user);
    }

    @RequestMapping(value = "/delete", produces = "application/json;charset=UTF-8", method = RequestMethod.GET)
    public String Delete(User user){
        return userService.Delete(user);
    }
}

User.java

package com.example.demo.entity;

/**
 * @author yn2333
 * @Date 2020/03/03
 */
public class User {
    private Integer id;
    private String username;
    private String password;
    private String address;

    public User(Integer id, String username, String password, String address) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.address = address;
    }

    public Integer getId() {
        return id;
    }

    public String getUsername() {
        return username;
    }

    public String getPassword() {
        return password;
    }

    public String getAddress() {
        return address;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", address='" + address + '\'' +
                '}';
    }
}

UserMapper.java

package com.example.demo.mapper;

import com.example.demo.entity.User;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

/**
 * @author yn2333
 * @Date 2020/03/03
 */
@Repository
public interface UserMapper {

    User Sel(@Param("user")User user);

    int Add(@Param("user")User user);

    int Update(@Param("user")User user);

    int Delete(@Param("user")User user);
}

UserService.java

package com.example.demo.service;

import com.example.demo.entity.User;
import com.example.demo.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author yn2333
 * @Date 2020/03/03
 */
@Service
public class UserService {
    @Autowired
    UserMapper userMapper;

    public User Sel(User user) {
        return userMapper.Sel(user);
    }

    public String Add(User user) {
        int a = userMapper.Add(user);
        if (a == 1) {
            return "添加成功";
        } else {
            return "添加失败";
        }
    }

    public String Update(User user) {
        int a = userMapper.Update(user);
        if (a == 1) {
            return "修改成功";
        } else {
            return "修改失败";
        }
    }

    public String Delete(User user) {
        int a = userMapper.Delete(user);
        if (a == 1) {
            return "删除成功";
        } else {
            return "删除失败";
        }
    }

}

DemoApplication.java

package com.example.demo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
 * @author yn2333
 * @Date 2020/03/03
 */

@MapperScan("com.example.demo.mapper") //扫描的mapper
@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

UserMapper.xml


        INSERT INTO user
        
                username,
            
                password,
            
                address,
            
                #{user.username,jdbcType=VARCHAR},
            
                #{user.password,jdbcType=VARCHAR},
            
                #{user.address,jdbcType=VARCHAR},
            
        UPDATE user
        
                username = #{user.username},
            
                password = #{user.password},
            
                address = #{user.address},
            
        WHERE
        id=#{user.id}
    
        DELETE FROM user WHERE id = #{user.id}