mybatise 1、纯注解开发demo

版权声明： https://blog.csdn.net/yz18931904/article/details/83271169

java   对象

public class User {
    private int id;
    private String name;
    private UserSexEnum userSex;
    private String password;

 
}

public enum  UserSexEnum {
    MALE,FEMALE
}

接口

public interface UserMapper {
    @Select("SELECT * FROM user")
    @Results({
            @Result(property = "userSex",  column = "user_sex", javaType = UserSexEnum.class),
    })
    List<User> getAll();

    @Select("SELECT * FROM user WHERE id = #{id}")
    @Results({
            @Result(property = "userSex",  column = "user_sex", javaType = UserSexEnum.class),
    })
    User getOne(Long id);

    @Insert("INSERT INTO user(name,password,user_sex) VALUES(#{name}, #{password}, #{userSex})")
    void insert(User user);

    @Update("UPDATE user SET name=#{name},password=#{password} WHERE id =#{id}")
    void update(User user);

    @Delete("DELETE FROM user WHERE id =#{id}")
    void delete(Long id);
}

测试类

@RunWith(SpringRunner.class)
@SpringBootTest
public class MybatisBootApplicationTests {
    @Autowired
    private UserMapper userMapper;

    @Test
    public void testInsert() {
        userMapper.insert(new User("zangliang", "a123456", UserSexEnum.MALE));
//        Assert.assertEquals(3,userMapper.getAll().size());
    }

    @Test
    public void testQuery() throws Exception {
        List<User> users = userMapper.getAll();
        System.out.println(users.toString());
    }

    @Test
    public void testUpdate() throws Exception {
        User user = userMapper.getOne(10l);
        user.setName("neo");
        userMapper.update(user);
        Assert.assertTrue(("neo".equals(userMapper.getOne(10l).getName())));
    }

}

数据库文件

CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `password` varchar(45) NOT NULL,
  `name` varchar(255) DEFAULT NULL,
  `user_sex` enum('MALE','FEMALE') DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8;