Mybaits利用resultMap实现一对一

定义resultMap：

引用resultMap：

    SELECT
    orders.*,
    user.username,
    user.sex,
    user.birthday,
    user.address
    FROM orders,
    USER
    WHERE orders.user_id = user.id

mapper:

public List findOrderUserResultMap() throws Exception;

Test:

public class OrdersMapperCustomTest {
	private SqlSessionFactory sqlSessionFactory;
	@Before
	public void setUp() throws Exception {
		InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml");
		sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
	}
	
	@Test
	public void testFindOrderUserResultMap() throws Exception {
		SqlSession sqlSession = sqlSessionFactory.openSession();
		OrdersMapperCustom ordersMapperCustom = sqlSession.getMapper(OrdersMapperCustom.class);
		
		List orderList = ordersMapperCustom.findOrderUserResultMap();
		
		System.out.println(orderList);
	}

}