<?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");