问下关于extjs的动态树的问题

Question

[code="java"]
var _root = new Ext.tree.AsyncTreeNode({
text:'功能菜单',
id:'root',
loader:new Ext.tree.TreeLoader({

dataUrl:'menuAction.action'
})
var index = new Ext.tree.TreePanel({
root:_root,
代码略......
})

[/code]
dataUrl如果是jsp页面(数据如下)就可以出来树,走struts2的action怎么就没反应,进不去?
难道必须用Ext.Ajax.request请求么,那jsp页面的内容怎么能取出来?
[code="java"]
String nodeId = request.getParameter("node");
StringBuffer tree = new StringBuffer();
if(nodeId.equals("root")){
tree.append("[");
tree.append("{id:'level1-1',text:'子节点1',leaf:true},");
tree.append("{id:'level1-2',text:'节点目录2',leaf:false},");
tree.append("{id:'level1-3',text:'节点目录3',leaf:false}");
tree.append("]");
}else if(nodeId.equals("level1-2")){
tree.append("[");
tree.append("{id:'level2-1',text:'二级节点2-1',leaf:true},");
tree.append("{id:'level2-2',text:'二级节点2-2',leaf:true}");
tree.append("]");
}else{
tree.append("[");
tree.append("{id:'level3-1',text:'节点3-1',leaf:true},");
tree.append("{id:'level3-2',text:'节点3-2',leaf:true}");
tree.append("]");
}
response.getWriter().write(tree.toString());
[/code]

Answer 1

请求jsp与请求action是一样的，只要你的url写对了，action的struts文件配对了就没有问题。你先在浏览器中直接访问该action看看该请求是否能正确执行，是否有响应数据回来。