Mybatis——编写映射配置完成基础增删改查（代理开发方式）

利用SpringBoot整合Mybatis，用Mapper.xml配置文件与Mapper接口配置映射完成四个基础的增删改查语句，注意先配置好数据源环境。

User 类

public class User {
    private int id;
    private String name;
    private String password;
    //......注意配置get set 方法
}

UserMapper.xml 映射配置

    
    
        delete from user where id=#{id}
    
    
    
    
        update user set name=#{name},password=#{password} where id=#{id}
    

    
    
        
        
        insert into user values (#{id}, #{name}, #{password})
    

    
    
        select * from user
    

    
    
        select * from user where id=#{id}
    
    

UserXmlMapper 接口

@Mapper
@Repository
public interface UserXmlMapper {
    public void delete(int id);
    public void update(User user);
    public void save(User user);
    public List findAll();
    public User findById(int id);
}

SpringBootMybatisApplicationTests 测试类

@RunWith(SpringRunner.class)
@SpringBootTest
class SpringBootMybatisApplicationTests {

    private User user = new User();

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private UserXmlMapper userXmlMapper;

    @Test
    public void testFindAll(){
        List list = userXmlMapper.findAll();
        System.out.println(list);
    }

    @Test
    public void testByID(){
        User user = userXmlMapper.findById(1234567805);
        System.out.println(user);
    }

    @Test
    public void testInsert(){
        user.setId(1234567805);
        user.setName("老七");
        user.setPassWord("123456");
        userXmlMapper.save(user);
        System.out.println("插入成功！");
    }

    @Test
    public void testUpdate(){
        user.setId(1234567805);
        user.setName("张三");
        user.setPassWord("123456");
        userXmlMapper.update(user);
        System.out.println("修改成功！");
    }

    @Test
    public void testDelete(){
        userXmlMapper.delete(1234567805);
        System.out.println("删除成功！");
    }
}