flex与javascript交互传值 - flex

main.mxml文件代码：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init()">
<mx:Script>
  <![CDATA[
   import flash.external.*;
   private function init():void{
    ExternalInterface.addCallback("setValue",setTextValue);
   }
   private function onBrowseClick():void{
    ExternalInterface.call("browse");
   }
   private function setTextValue(val:String):void{
    txtFileName.text=val;
   }
  ]]>
</mx:Script>
<mx:Button y="154" label="Button" click="ExternalInterface.call('alert',txt.text)" horizontalCenter="0"/>
<mx:TextInput y="88" horizontalCenter="0" id="txt"/>
<mx:Button y="184" label="Browse" horizontalCenter="0" click="onBrowseClick()"/>
<mx:TextInput y="226" horizontalCenter="0" id="txtFileName"/>
</mx:Application>

index.htm文件代码：

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-CN" lang="zh-

CN">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>external2</title>
</head>
<body bgcolor="#ffffff" onload="getID('main');">
<script language=javascript>
var me;
function getID(swfID){
if(navigator.appName.indexOf("Microsoft")>-1){
  me=window[swfID];
}else{
  me=document[swfID];
}
}
function browse(){
    myFile.click();
}

function giveValueToFlash(val){
me.setValue(val);
}

</script>
<input type="File" id="myFile" onchange="giveValueToFlash

(myFile.value)" style="visibility:hidden"/>
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"

codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swf

lash.cab#version=8,0,0,0" width="550" height="400" id="main"

align="middle">
<param name="allowScriptAccess" value="sameDomain" />
<param name="movie" value="main.swf" /><param name="quality"

value="high" /><param name="bgcolor" value="#ffffff" /><embed

src="main.swf" quality="high" bgcolor="#ffffff" width="550"

height="400" name="external2" align="middle"

allowScriptAccess="sameDomain" type="application/x-shockwave-flash"

pluginspage="http://www.macromedia.com/go/getflashplayer" />
</object>
</body>
</html>
将文件放到iis下或tomcat下，运行index.htm即可。