?xml version="1.0" encoding="utf-8"?>
s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
creationComplete="initHandler()">
s:layout>
s:HorizontalLayout/>
/s:layout>
fx:Script>
![CDATA[
import mx.events.FlexEvent;

/*初始化函数*/
protected function initHandler():void
{
var file:File = new File();
}

]]>
/fx:Script>
fx:Declarations>
!-- 将非可视元素（例如服务、值对象）放在此处 -->
/fx:Declarations>
/s:WindowedApplication>

var file:File = new File(File。applicationDirectory.nativePath+"/test.txt");