saveas.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<!--http://www.sloppy.cn/blog/article/228.htm-->
<mx:Script>
<![CDATA[
import mx.graphics.codec.JPEGEncoder;
import mx.graphics.ImageSnapshot;
private function saveAs():void{
var en:JPEGEncoder = new JPEGEncoder(100); //压缩图片，100是指质量
var ba:ByteArray=en.encode(ImageSnapshot.captureBitmapData(img1));//将控件转为BitmapData后再转为ByteArray
var request:URLRequest = new URLRequest("saveas.php");
request.method="POST";
request.data=ba;
request.contentType = "application/octet-stream"; //这个很重要，设置成流数据
navigateToURL(request,"_blank"); //因为要浏览器触发下载事件，所以就不用异步方式打开连接了
}
]]>
</mx:Script>
<mx:Button x="498" y="276" label="另存到本地" click="saveAs()"/>
<mx:Image id="img1" x="119" y="124" source="1.png" width="212" height="311" scaleContent="false"/>
</mx:Application>
saveas.php
<?php
$fp = fopen("php.jpg", 'wb');
fwrite($fp,$HTTP_RAW_POST_DATA);
fclose($fp);
echo("<script language=javascript>alert('保存成功!');window.close();</script>");
/*
echo "a";
echo $_POST["data"];
echo $HTTP_RAW_POST_DATA;
*/
?>
