一对多的关系

 

 

<resultMap type="Person" id="personBean">
  <id column="personId" property="id"/>
    <result column="personName" property="name"/>
    <result column="personAddress" property="address"/>
  <result column="personTel" property="tel"/>

  <!-- 一对多的关系 -->
  <!-- property: 指的是集合属性的值, ofType:指的是集合中元素的类型 -->
  <collection property="orders" ofType="Order">
    <id column="orderId" property="id"/>
    <result column="orderNumber" property="number"/>
    <result column="orderPrice" property="price"/>
  </collection>
</resultMap>


<resultMap type="Order" id="orderBean">
  <id column="orderId" property="id"/>
  <result column="orderNumber" property="number"/>
  <result column="orderPrice" property="price"/>

  <!-- 多对一的关系 -->
  <!-- property: 指的是属性的值, javaType:指的是属性的类型-->
  <association property="person" javaType="Person">
    <id column="personId" property="id"/>
    <result column="personName" property="name"/>
    <result column="personAddress" property="address"/>
    <result column="personTel" property="tel"/>
  </association>
</resultMap>

 

posted @ 2017-09-04 10:23  wdmiye  阅读(199)  评论(0编辑  收藏  举报