1. 导入依赖

首先新建一个springboot项目，勾选组件时勾选Spring Web、JDBC API、MySQL Driver

然后导入以下整合依赖

<!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter --><dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.3</version></dependency>

2. 连接数据库

数据库代码：

-- 创建数据库CREATE DATABASE springboot;-- 使用springboot数据库use springboot;-- 创建user表CREATE TABLE IF NOT EXISTS `user`( `id` INT(4) NOT NULL AUTO_INCREMENT COMMENT '身份号', `name` VARCHAR(30) NOT NULL DEFAULT '匿名' COMMENT '姓名', `pwd` VARCHAR(30) NOT NULL DEFAULT '123456' COMMENT '密码', PRIMARY KEY (`id`))ENGINE=INNODB DEFAULT CHARSET=utf8-- 给user表插入数据INSERT INTO `user`(`id`,`name`,`pwd`) VALUES ('1','zsr',000204),('2','gcc',000421),('3','BaretH',200024);

然后IDEA连接数据库

打开我们创建的数据库springboot

对应的user表

3. 编写数据库配置信息

在springboot配置文件中配置数据库信息

spring.datasource.username=rootspring.datasource.password=200024spring.datasource.url=jdbc:mysql://localhost:3306/springboot?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTCspring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

4. 编写pojo实体类

在主程序同级目录下新建pojo包，其中新建User实体类（使用了lombok）

package com.zsr.pojo;import lombok.AllArgsConstructor;import lombok.Data;import lombok.NoArgsConstructor;@Data@AllArgsConstructor@NoArgsConstructorpublic class User { int id; String name; String password;}

5. 编写mapper接口

在主程序同级目录下新建mapper包，其中新建UserMapper接口

package com.zsr.mapper;import com.zsr.pojo.User;import org.apache.ibatis.annotations.Mapper;import org.springframework.stereotype.Repository;import java.util.List;@Mapper //表示这是Mybatis的mapper类@Repositorypublic interface UserMapper { List<User> queryUserList(); User queryUserByID(int id); int addUser(User user); int updateUser(User user); int deleteUser(int id);}

6. 编写mapper.xml

在resources目录下新建mabatis包，其中新建mapper包，再在其中新建mapper.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.zsr.mapper.UserMapper"> <select id="queryUserList" resultType="user"> select * from user </select> <select id="queryUserByID" resultType="user"> select * from user where id= #{id} </select> <insert id="addUser" parameterType="user"> insert into user(id,name,pwd) values (#{id},#{name},#{pwd}) </insert> <update id="updateUser" parameterType="user"> update user set name=#{name},pwd=#{pwd} where id=#{id} </update> <delete id="deleteUser" parameterType="int"> delete from user where id=#{id} </delete></mapper>

7. 编写controller

在主程序同级目录下新建controller包，在其中新建UserController

package com.zsr.controller;import com.zsr.mapper.UserMapper;import com.zsr.pojo.User;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController;import java.util.List;@RestControllerpublic class UserController { @Autowired private UserMapper userMapper; @GetMapping("/queryUserList") public List<User> queryUserList() { List<User> users = userMapper.queryUserList(); return users; } @GetMapping("/queryUserByID") public User queryUserByID() { User user = userMapper.queryUserByID(2); return user; } @GetMapping("/addUser") public String addUser() { userMapper.addUser(new User(4, "zml", "45632")); return "增加用户完毕"; } @GetMapping("/updateUser") public String updateUser() { userMapper.updateUser(new User(4, "zml", "678910")); return "修改用户完毕"; } @GetMapping("/deleteUser") public String deleteUser() { userMapper.deleteUser(4); return "删除用户完毕"; }}

8. 测试

测试访问http://localhost:8080/queryUserList

测试访问http://localhost:8080/queryUserByID

测试访问http://localhost:8080/addUser

测试访问http://localhost:8080/updateUser

测试访问http://localhost:8080/deleteUser

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