4、 Flex中Image控件相关之Java+Flex项目中ByteArray传到服务器端（java端）持久化（文件上传）

Flex中Image控件相关之Java+Flex项目中ByteArray传到服务器端（java端）持久化（文件上传）<?xml version="1.0" encoding="utf-8"?>

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
			   xmlns:s="library://ns.adobe.com/flex/spark"
			   xmlns:mx="library://ns.adobe.com/flex/mx"
			   minWidth="955" minHeight="600"
			   creationComplete="createHandler()"
			   >
	
	<fx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import mx.utils.Base64Encoder;
			
			private function createHandler():void{
				fileRefer.addEventListener(Event.SELECT,selectHandler);	//选择文件
				fileRefer.addEventListener(Event.COMPLETE,completeHandler);//加载完成
			}
			
			
			private function selectHandler(event:Event):void{
				if(fileRefer){
					fileRefer.load();
				}
			}
			
			private function completeHandler(event:Event):void{
				if(fileRefer){
					mySource.source = fileRefer.data;
				}
			}
			
			
			private var fileRefer:FileReference = new FileReference();
			protected function sourceFile_clickHandler(event:MouseEvent):void
			{
				// TODO Auto-generated method stub
				fileRefer.browse([new FileFilter("Images(*.jpg;*.gif;*.png)","*.jpg;*.gif;*.png")]);
			}
			
			protected function btn_canvertToImage_clickHandler(event:MouseEvent):void
			{
				// TODO Auto-generated method stub
				if(fileRefer.data){
					destSource.source = fileRefer.data;
				}
			}
			
			
			private var urlRequest:URLRequest = new URLRequest("http://localhost:9080/ByteArrayApp/persistence");
			protected function btn_persistence_clickHandler(event:MouseEvent):void
			{
				// TODO Auto-generated method stub
				urlRequest.data = fileRefer.data;
				urlRequest.contentType = "application/octet-stream";
				urlRequest.method = URLRequestMethod.POST;
				
				var urlloader:URLLoader = new URLLoader();
				urlloader.dataFormat = URLLoaderDataFormat.BINARY;
				urlloader.addEventListener(Event.COMPLETE,completePersistenceHandler);
				urlloader.load(urlRequest);
			}
			
			private function completePersistenceHandler(event:Event):void{
				Alert.show("持久化成功","恭喜");
			}
		]]>
	</fx:Script>
	
	<fx:Declarations>
	</fx:Declarations>
	<s:BorderContainer id="sourceFileContainer" x="8" y="30" borderColor="#1F7888" click="sourceFile_clickHandler(event)">
		<s:Image id="mySource" x="0" y="-4" width="130" height="127"/>
	</s:BorderContainer>
	<s:Button id="btn_canvertToImage" x="158" y="93" width="52" height="18" label="==&gt;" chromeColor="#1F7888"
			  color="#FEFDFD" click="btn_canvertToImage_clickHandler(event)"/>
	
	<s:BorderContainer id="destSourceContainer" x="224" y="35" borderColor="#1F7888">
		<s:Image id="destSource"  width="130" height="127"/>
	</s:BorderContainer>
	<s:Button id="btn_persistence" x="372" y="90" label="==&gt;持久化到硬盘" chromeColor="#1F7888" click="btn_persistence_clickHandler(event)"/>
	<s:Label x="34" y="167" width="75" height="17" text="点击选择图片"/>
	
</s:Application>

 package com.lmx.servlet;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class PersistenceServlet
 */
@WebServlet("/persistence")
public class PersistenceServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public PersistenceServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		System.out.println("============BEGIN===================");
		
		ServletInputStream servletInputStream = request.getInputStream();
		
		int len = request.getContentLength();
		
		byte buffer[] = new byte[len];
		
		int readlen=0;
		
		FileOutputStream fos = new FileOutputStream(new File("c:/jun.jpg"));
		while((readlen=servletInputStream.read(buffer))!=-1){
			fos.write(buffer, 0, readlen);
		}
		fos.flush();
		fos.close();
		servletInputStream.close();
		System.out.println("============END===================");
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}