MyBatis查Java优学网结果处理：轻松掌握数据映射与关联查询技巧

<result property="username" column="username"/>
<result property="email" column="email"/>
<association property="profile" javaType="UserProfile">
    <id property="profileId" column="profile_id"/>
    <result property="realName" column="real_name"/>
    <result property="birthday" column="birthday"/>
    <result property="address" column="address"/>
</association>

<setting name="aggressiveLazyLoading" value="false"/>

private Long orderId;
private String orderNo;
private BigDecimal totalAmount;
private User user;          // 下单用户
private Address address;    // 收货地址
private List<OrderItem> items; // 订单项列表
private List<OrderLog> logs;   // 订单日志