springboot入门——整合mybatis

1. pom

		<!--添加mybatis起步依赖-->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.1.1</version>
		</dependency>
		
        <!--添加数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

2. mysql创建user表

• 建表
  
• 运行sql语句

DROP TABLE IF EXISTS `user`;
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=10 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', 'zhangsan', '123', '张三');
INSERT INTO `user` VALUES ('2', 'lisi', '123', '李四');

3. 数据库连接信息（application.properties）

# 数据库连接信息
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://172.20.10.13:3306/test?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=11250825

4. 创建实体Bean

java——domain——User

@Data
public class User {
    private Integer id;
    private String username;
    private String password;
    private String name;
}

5. 配置Mapper映射文件

resources——mapper——UserMapper.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.itheima.mapper.UserMapper">
    <select id="queryUserList" resultType="user">
        select * from user
    </select>
</mapper>

6. 编写mapper接口

java——mapper——UserMapper

@Mapper
public interface UserMapper {
    public List<User> queryUserList();
}

7. 配置mybatis的信息（application.properties）

# 配置mybatis的信息
#spring集成Mybatis环境
#pojo别名扫描包
mybatis.type-aliases-package=com.itheima.domain
#加载Mybatis映射文件
mybatis.mapper-locations=classpath:mapper/*Mapper.xml

8. 编写测试controller

controller——MybatisController.java

@RestController
public class MybatisController {

    @Autowired
    private UserMapper userMapper;

    @RequestMapping("/query")
    public List<User> queryUserList(){
        List<User> users = userMapper.queryUserList();
        return users;
    }
}

9. 运行

localhost:8080/query

10. 集成Junit

在对应test目录下编写测试类 MybatisTest.java

//Runwith代表用谁去执行
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootMybatisApplication.class)
public class MybatisTest {

    @Autowired
    private UserMapper userMapper;

    @Test
    public void test() {
        List<User> users = userMapper.queryUserList();
        System.out.println(users);
    }
}

运行后结果如下：