SpringBoot整合Mybatis主要分为以下几个步骤：
1、添加Mybatis的起步依赖(pom.xml)
2、添加数据库驱动坐标(pom.xml)
3.添加数据库连接信息（application.properties）
4、创建user表
5、创建实体Bean
6、编写Mapper接口，可理解为dao
7、配置Mapper接口对应的Mapper映射文件，可理解为dao的方法要执行的sql语句
8、在application.properties中添加Mybatis的相关信息
9、编写Controller
10、启动SpringBoot的引导类尽心测试
具体代码如下：
pom.xml中与整合Mybatis相关的配置如下：
<!--mybatis起步依赖--><dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.2.0</version></dependency><dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <!--不需要填写版本号，因为在父依赖里已经给了判断--> <!--<version>5.1.39</version>--></dependency>application.properties中的配置信息如下：
#数据库连接信息spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&serverTimezone=UTCspring.datasource.username=rootspring.datasource.password=root@123spring.datasource.driver-class-name=com.mysql.jdbc.Driver#springboot集成mybatis#pojo扫描mybatis.type-aliases-package=come.itheima.domainmybatis.mapper-locations=classpath:mapper/*Mapper.xml建表语句以及插入两条测试数据，如下：
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(50) DEFAULT NULL,
`password` varchar(50) DEFAULT NULL,
`name` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
insert into user values(1,'zhangsan','123','张三');
insert into user values(2,'lisi','123','李四');
user实体的内容如下：
package com.itheima.domain;public class User { private int id; private String username; private String password; private String name; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "User{" + "id=" + id + ", username='" + username + '\'' + ", password='" + password + '\'' + ", name='" + name + '\'' + '}'; }}
Mapper接口内容如下：
package com.itheima.mapper;import com.itheima.domain.User;import org.apache.ibatis.annotations.Mapper;import java.util.List;@Mapperpublic interface UserMapper { public List<User> queryUserList();}
UserMapper.xml接口与执行sql的映射文件内容如下：
<?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.itheima.mapper.UserMapper"> <select id="queryUserList" resultType="com.itheima.domain.User"> select * from user </select></mapper>controller代码内容如下：
package com.itheima.controller;import com.itheima.domain.User;import com.itheima.mapper.UserMapper;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import java.util.List;@Controllerpublic class MybatisController { @Autowired private UserMapper userMapper; @RequestMapping("/query") @ResponseBody public List<User> queryUserList(){ List<User> users = userMapper.queryUserList(); return users; }}默认生成的引导类内容如下：
package com.itheima;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class SpringbootMybatisApplication { public static void main(String[] args) { SpringApplication.run(SpringbootMybatisApplication.class, args); }}
整体目录结构如下图：
