官方參考文件：http://mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/

當前版本說明：SpringBoot : 2.6.2

匯入依賴

<dependency>
  <groupId>org.mybatis.spring.boot</groupId>
  <artifactId>mybatis-spring-boot-starter</artifactId>
  <version>2.2.0</version>
</dependency>
 

使用方法一

通過 @Mapper 註解標註使用的檔案，通過 @Select、@Update、@Delete、@Insert等註解實現簡單的語法操作，舉個例子：

Mapper 檔案：

@Mapper
public interface UserMapper {
    @Select("select * from `user` where username=#{username} and password = #{password}")
    User getUserByUsernamePassword(String username, String password);
}

呼叫方式

@Service
public class UserServiceImpl {
    @Resource
    private UserMapper userMapper;

    @Override
    public User getUserByUsernamePassword(String username, String password) {
        return userMapper.getUserByUsernamePassword(username, password);
    }
}
 

使用方法二

通過@MapperScan配置掃描的資料夾，通過xml檔案來處理複雜的SQL

在啟動檔案中配置@MapperScan

@MapperScan("com.yituomao.blog.back.mapper")
@SpringBootApplication

Mapper檔案

public interface UserMapper {
    void updateUser(User user);
}

Mapper.xml 檔案

<?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.yituomao.blog.back.mapper.UserMapper">
    <update id="updateUser" parameterType="com.yituomao.blog.back.pojo.User">
        update `user`
        set username = #{username}, password = #{password}, email = #{email}
        where id = #{id}
    </update>
</mapper>
 

呼叫方式與“方法一”一致