mybatis的一个嵌套集合，求各路好汉看看?报错

不废话直接上码。

Role 类：根据角色得到资源

Power 类：{资源

private String leftpowerId;


private LeftPower leftPower; // 左菜单资源

}

那么我在roleMapper.xml{

    <resultMap type="com.mybatis.ssoft.model.Power" id="role_power_resultMap">
<id property="id" column="ID"/>
<result property="powerName" column="POWERNAME"/>
<result property="iconCls" column="ICONCLS"/>
<result property="rank" column="RANK"/>

<result property="leftpowerId" column="LEFTPOWERID"/>
<!-- 加载左边资源列表 -->
<association property="leftPower" column="LEFTPOWERID"
javaType="com.mybatis.ssoft.model.LeftPower" resultMap="power_leftPower" />


<!-- 递归自身children -->
<association property="parentPower" column="CHILDREN" javaType="com.mybatis.ssoft.model.Power">
<id property="id" column="ID"/>
<result property="powerName" column="POWERNAME"/>
<result property="iconCls" column="ICONCLS"/>
<result property="rank" column="RANK"/>
<association property="attributes" column="RESOURCEPOWERID"
javaType="com.mybatis.ssoft.model.PowerResource" resultMap="C"/>
<!-- 此处省略 leftPower -->
</association>



<!-- 加载权限资源url -->
<association property="attributes" column="RESOURCEPOWERID"
javaType="com.mybatis.ssoft.model.PowerResource" resultMap="C"/>


</resultMap>


<!-- 资源路径集合 -->
<resultMap type="com.mybatis.ssoft.model.PowerResource" id="C">
<id property="id" column="ID"/>
<result property="url" column="URL"/>
</resultMap>

}

其中棕色字体就是报错的：

Error getting nested result map values for 'leftPower'.  Cause: java.lang.IllegalArgumentException: Result Maps collection does not contain value for com.mybatis.ssoft.dao.RoleMapper.power_leftPower

其中

 resultMap="power_leftPower" 对应的文件LeftPowerMapper.xml 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mybatis.ssoft.dao.LeftPowerMapper">
<resultMap type="com.mybatis.ssoft.model.LeftPower" id="power_leftPower">

<id property="id" column="ID"/>
<result property="leftPowerName" column="LEFTPOWERNAME"/>
<result property="leftPowerContext" column="LEFTPOWERCONTEXT"/>
<result property="iconCls" column="ICONCLS"/>
<result property="rank" column="RANK"/>
<association property="topPower" column="TOPPWERID" javaType="com.mybatis.ssoft.model.TopPower" resultMap="A"/>

</resultMap>






</mapper>

排版不太好，请见谅