springBoot mybatis配置

1.pom 配置

 <!--mybatis配置 start-->
        <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>
            <version>5.1.39</version>
        </dependency>
        <!--mybatis配置 end-->

2.resources资源中application.yml 配置

spring:
  datasource:
    url: jdbc:mysql://192.168.0.1:3306/数据库?useUnicode=true&characterEncoding=utf8
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver

mybatis:
  mapper-locations: classpath:mybatis-mappers/*.xml

3.如果没有resources资源文件夹，可先建立resources 文件夹

file-》project structure-》Modules-》sources-》 找到 resources文件夹

点击红框中resources  点击 Apply   OK 就可以了

4.建立实体包 entity

创建user实体类

@Setter
@Getter
public class user {
    private String id;
    private String name;
    private int sex;
}//end

5.建立mapper包

创建 userMapper 接口

@Repository
public interface userMapper {
    @Select("select * from user where id=#{id}")
    user selectUser(String id);
}//end

另一种方式用xml配置

@Repository
public interface userMapper{boolean insertList(List<user> list);
}//end

xml 需要配置到 resources 资源文件夹下 mybatis-mappers 中

<?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="userMapper包的全路径">
    <insert id="insertList" >
        insert into user
        (id,name,sex)
        values
        <foreach collection="list" item="item" index="index" separator=",">
            (
            #{item.id},
            #{item.name},
            #{item.sex}
            )
        </foreach>
    </insert>
</mapper>

6.建立service包

创建 UserService 接口

public interface UserService {
    user selectUser(String id);
}//end

创建实现类 UserServiceImpl

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    userMapper _userMapper;

    @Override
    public user selectUser(String id) {
        return _userMapper.selectUser(id);
    }
}//end

7. 创建testController 类

@RestController
@RequestMapping(value = "/test")
public class testController {
    @Autowired
    private UserService _UserService;

    @RequestMapping(value = "/select/{id}")
    public String selectUser(@PathVariable String id) {
        return _UserService.selectUser(id).getName();
    }
}//end

8.主程序入口，加入Mapper 扫包范围

@MapperScan("mapper包路径")
@SpringBootApplication
public class Application {

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

}