Flex树形菜单实例带跳转功能根据官方示例添加链接

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" verticalAlign="top"
    horizontalAlign="center"  paddingTop="0" viewSourceURL="srcview/index.html">
 
 <mx:Script>
  <![CDATA[
   import mx.controls.Alert;
   
   [Bindable]
   public var selectedNode:XML;
   
   // Event handler for the Tree control change event.
   public function treeChanged(event:Event):void {
    selectedNode=Tree(event.target).selectedItem as XML;
    
//    Alert.show(""+selectedNode.attribute("url"));
//    var u = selectedNode.attribute("url");
    ExternalInterface.call("function(){window.location.href='"+selectedNode.attribute("url")+"';}");

//    Alert.show(""+selectedNode.toXMLString());
   }
  ]]>
 </mx:Script>
 
 <mx:XMLList id="treeData">
  <node label="Mail Box">
   <node label="Inbox">
    <node label="Marketing" url="http://localhost:8088/webpro/webpro-debug/Main.html" />
    <node label="Product Management"/>
    <node label="Personal"/>
   </node>
   <node label="Outbox">
    <node label="Professional"/>
    <node label="Personal"/>
   </node>
   <node label="Spam"/>
   <node label="Sent"/>
  </node>   
 </mx:XMLList>
 
 <mx:Panel title="Tree Control" layout="vertical" color="0xffffff" borderAlpha="0.15" width="500"
     paddingTop="10" paddingRight="10" paddingBottom="10" paddingLeft="10" horizontalAlign="center">
  
  <mx:Label width="100%" color="0x323232"
      text="Select a node in the Tree control."/>
  
  <mx:HDividedBox width="100%" height="100%" color="0x323232">
   <mx:Tree id="myTree" width="50%" height="100%" labelField="@label"
      showRoot="false" dataProvider="{treeData}" change="treeChanged(event)"/>
   <mx:TextArea height="100%" width="50%"
       text="Selected Item: {selectedNode.@label}"/>
  </mx:HDividedBox>
  
 </mx:Panel>
</mx:Application>