Java优学网MyBatis关联查询教程：轻松掌握一对一、一对多查询，告别复杂SQL编写烦恼
<resultproperty="username"column="username"/><collectionproperty="orders"ofType="Order"><idproperty="id"column="order_id"/&...
<resultproperty="username"column="username"/><collectionproperty="orders"ofType="Order"><idproperty="id"column="order_id"/&...