struts2<s:tree>标签用法

Question

<s:tree label="查询资产" theme="ajax" showRootGrid="true" showGrid="true" treeSelectedTopic="treeSelected">
 
    <s:treenode label="资产类别" theme="ajax">
    <s:iterator id="assetCateSuperList" value="#request.assetCateSuperList">
    <s:treenode label="%{#assetCateSuperList['cateName']}" theme="ajax">
    <s:iterator id="assetCateList" value="#request.assetCateList">
    <s:treenode label="%{#assetCateList['cateName']}" theme="ajax"/>
    </s:iterator>
    </s:treenode>
    </s:iterator>
    </s:treenode>
    
    </s:tree>
如何让子菜单根据夫菜单的值而改变~