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Flex 基于Http方式上傳圖片(轉(zhuǎn))

首先下載 commons-fileupload-1.2.1.jar和commons-io-1.1.jar

flex端代碼：

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

layout="absolute"

xmlns="*"

creationComplete="init();">

<mx:Script>

<![CDATA[

import flash.events.*;

import mx.controls.Alert;

import mx.events.CloseEvent;

import mx.managers.CursorManager;

private var file:FileReference;

private var byteArray:ByteArray;

private var bitmapData:BitmapData;

private var loader:Loader=new Loader();

private function init():void

{

Security.allowDomain("*");

file=new FileReference();

file.addEventListener(Event.COMPLETE, fileReferenceCompleteHandler);

file.addEventListener(Event.SELECT, fileReferenceSelectHandler);

}

//選擇上傳的圖片

private function choose():void

{

var imageTypes:FileFilter=new FileFilter("Images (*.jpg, *.jpeg, *.png)", "*.jpg;*.jpeg;*.png");

var allTypes:Array=new Array(imageTypes);

file.browse(allTypes);

// file.browse();

}

private function toUpload():void

{

if (bitmapData == null)

{

Alert.show("請您先選擇要上傳的圖片");

}

else

{

Alert.show("上傳 " + file.name + " (共 " + Math.round(file.size) + " 字節(jié))?", "確認(rèn)上傳", Alert.YES | Alert.NO, null, proceedWithUpload);

}

//監(jiān)聽文件上傳狀態(tài)

private function onProgress(e:ProgressEvent):void

{

lbProgress.text=" 已上傳 " + e.bytesLoaded + " 字節(jié)，共 " + e.bytesTotal + " 字節(jié)";

var proc:uint=e.bytesLoaded / e.bytesTotal * 100;

bar.setProgress(proc, 100);

bar.label="當(dāng)前進(jìn)度: " + " " + proc + "%";

if (e.bytesLoaded == e.bytesTotal)

{

CursorManager.removeBusyCursor();

}

//上傳圖片到服務(wù)器

private function proceedWithUpload(e:CloseEvent):void

{

if (e.detail == Alert.YES)

{

//進(jìn)度監(jiān)聽

file.addEventListener(ProgressEvent.PROGRESS, onProgress);

var request:URLRequest=new URLRequest("http://localhost:8080/FileUploaded");

//設(shè)置鼠標(biāo)忙狀態(tài)

CursorManager.setBusyCursor();

try

{

file.upload(request);

Alert.show("恭喜你，上傳成功");

}

catch (error:Error)

{

Alert.show("上傳失敗");

trace("上傳失敗");

}

//上傳完成調(diào)用

private function completeHandle(event:Event):void

{

Alert.show("恭喜你，上傳成功");

}

//載入本地圖片

private function fileReferenceCompleteHandler(e:Event):void

{

byteArray=file.data;

loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loaderCompleteHandler);

loader.loadBytes(byteArray);

}

//圖片載入完成顯示在預(yù)覽框中

private function loaderCompleteHandler(e:Event):void

{

var bitmap:Bitmap=Bitmap(loader.content);

bitmapData=bitmap.bitmapData;

img.source=bitmap;

}

//選擇文件動作監(jiān)聽

private function fileReferenceSelectHandler(e:Event):void

{

file.removeEventListener(ProgressEvent.PROGRESS, onProgress);

file.load();

}

]]>

</mx:Script>

<mx:Canvas width="100%"

height="100%"

x="10"

y="170"

fontSize="15">

<mx:VBox width="100%"

horizontalAlign="center">

<mx:Label id="lbProgress"

text="上傳"/>

<mx:ProgressBar id="bar"

labelPlacement="bottom"

themeColor="#F20D7A"

minimum="0"

visible="true"

maximum="100"

label="當(dāng)前進(jìn)度: 0%"

direction="right"

mode="manual"

width="200"/>

<mx:Button label="上傳文件"

click="toUpload();"/>

</mx:VBox>

<mx:Panel width="469"

height="392"

verticalGap="0"

horizontalAlign="center"

verticalAlign="middle"

x="408"

y="129"

layout="absolute">

<mx:Button label="選擇文件"

click="choose();"

x="178"

y="9"/>

<mx:Image id="img"

width="400"

height="300"

x="36"

y="44"/>

</mx:Panel>

</mx:Canvas>

</mx:Application>

java servlet端代碼

package upload;

import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Iterator;

import java.util.List;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;

import org.apache.commons.fileupload.FileUploadException;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**

* @author lqw

public class FileUploaded extends HttpServlet {

// 定義文件的上傳路徑

private String uploadPath = "d:\\a\\";

// 限制文件的上傳大小

private int maxPostSize = 100 * 1024 * 1024;

public FileUploaded() {

super();

}

public void destroy() {

super.destroy();

}

protected void processRequest(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

System.out.println("to upload picture !");

response.setContentType("text/html;charset=UTF-8");

PrintWriter out = response.getWriter();

// 保存文件到服務(wù)器中

DiskFileItemFactory factory = new DiskFileItemFactory();

factory.setSizeThreshold(4096);

ServletFileUpload upload = new ServletFileUpload(factory);

upload.setSizeMax(maxPostSize);

try {

List fileItems = upload.parseRequest(request);

Iterator iter = fileItems.iterator();

while (iter.hasNext()) {

FileItem item = (FileItem) iter.next();

if (!item.isFormField()) {

String name = item.getName();

System.out.println(name);

try {

item.write(new File(uploadPath + name));

// SaveFile s = new SaveFile();

// s.saveFile(name);

} catch (Exception e) {

e.printStackTrace();

}

} catch (FileUploadException e) {

e.printStackTrace();

System.out.println(e.getMessage() + "結(jié)束");

}

protected void doGet(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

processRequest(request, response);

}

protected void doPost(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

processRequest(request, response);

}

public String getServletInfo() {

return "Short description";

}

web.xml 文件內(nèi)容：

<?xml version = '1.0' encoding = 'windows-1252'?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee">

<servlet-name>FileUploaded</servlet-name>

<servlet-class>upload.FileUploaded</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>FileUploaded</servlet-name>

<url-pattern>/FileUploaded</url-pattern>

</servlet-mapping>

<session-config>

<session-timeout>35</session-timeout>

</session-config>

<mime-mapping>

<mime-type>text/html</mime-type>

</mime-mapping>

<mime-mapping>

<mime-type>text/plain</mime-type>

</mime-mapping>

</web-app>

FLEX端如果出現(xiàn)安全沙箱的問題:是由于在tomcat環(huán)境下沒有聲明應(yīng)用程序能被外部訪問.

在程序的部署文件夾下添加crossdomain.xml文件.文件內(nèi)容為:

<?xml version="1.0"?>

<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">

<cross-domain-policy>

<allow-access-from domain="*" secure="false"/>

<allow-http-request-headers-from domain="*" headers="*" secure="false"/>

</cross-domain-policy>

http://blog.163.com/geliang0021@126/blog/static/32322329201111295559423/
http://wenku.baidu.com/view/9b1fceb769dc5022aaea00e9.html

posted on 2012-09-11 22:36 youngturk 閱讀(4109) 評論(0) 編輯收藏所屬分類: Java基礎(chǔ) 、Flex DEV 、servlet

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Flex 基于Http方式上傳圖片(轉(zhuǎn))

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