Flash 二进制传图片到后台Java服务器接收

需求：把客户端处理过的图片返还给服务器
Flash端代码
01 package {
02     import com.adobe.images.JPGEncoder;   
03     import flash.display.Sprite;
04     import flash.events.Event;
05     import flash.events.IOErrorEvent;
06     import flash.net.URLLoader;
07     import flash.net.URLRequest;
08     import flash.net.URLRequestMethod;
09     import flash.text.TextField;
10     import flash.utils.ByteArray;   
11     import mx.core.BitmapAsset;
12
13     [SWC(width='400',height='400',backgroundColor='0x4c4c4c',frameRate='30')]
14     public class Base extends Sprite
15     {
16         [Embed(source="../1.jpg")]  // same png / gif files
17         private var Photo:Class ;
18        
19         private var url:String = "http://localhost:8080/PicSample/aaa" ;
20         private var _loader:URLLoader = new URLLoader();;
21         private var reposeTxt:TextField;
22        
23         public function Base()
24         {
25             reposeTxt = new TextField();
26             addChild(reposeTxt);
27             reposeTxt.text = "waiting....";
28            
29             var photo:BitmapAsset = new Photo();
30             var urlRequest:URLRequest = new URLRequest(url);
31                        
32             var JPG:JPGEncoder = new JPGEncoder(70);
33             var bary:ByteArray = JPG.encode(photo.bitmapData);           
34             urlRequest.data=bary;
35             urlRequest.method=URLRequestMethod.POST;
36             urlRequest.contentType = "application/octet-stream";
37             _loader.addEventListener(Event.COMPLETE,completeHandler);
38             _loader.addEventListener(IOErrorEvent.IO_ERROR,ioErrorHandler);
39             _loader.load(urlRequest);
40            
41         }
42         private function completeHandler(evt:Event):void {
43             reposeTxt.text = "成功";
44         }
45         private function ioErrorHandler(evt:IOErrorEvent):void {
46             reposeTxt.text = "失败";
47         }
48     }
49 }


Java Servlet
01 @Override
02     protected void doPost(HttpServletRequest request, HttpServletResponse response)
03             throws ServletException, IOException {
04        
05         ServletInputStream in = request.getInputStream();
06         OutputStream outStream = new FileOutputStream("e:/m34.jpg");
07         int b =0;
08         while(b!= -1)
09         {
10             in.available();
11             b = in.read();
12             if(b!= -1)
13                 outStream.write(b);
14         }
15         outStream.close();
16     }