一对多 collection 标签
<resultMap>
<result property="" column=""/>
<collection property="" ofType="" column="">
<id property="" column="" jdbcType=""/>
<result property="" column="" jdbcType=""/>
</collection>
</resultMap>多对一 association 标签
<resultMap>
<result property="" column=""/>
<association property="" ofType="" column="">
<id property="" column="" jdbcType=""/>
<result property="" column="" jdbcType=""/>
</association>
</resultMap>