- <?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 flash.net.*;
import flash.net.FileReference;
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);
}
//选择上传的图片
private function choose():void
{
var imageTypes:FileFilter=new FileFilter("Images (*.jpg,*.jpeg,*.png)","*.jpg;*.jpeg;*.png"); //定义一个过滤器
var allTypes:Array=new Array(imageTypes);
file.browse(allTypes);
// file.browse();
}
private function toUpload():void
{
if (bitmapData == null)
{
Alert.show("请您先选择要上传的图片");
}
else
{
Alert.show("上传 " + file.name + " (共 " + Math.round(file.size) + " 字节)?","确认上传",Alert.YES | Alert.NO,null,proceedWithUpload);
}
}
//监听文件上传状态
private function onProgress(e:ProgressEvent):void
{
lbProgress.text=" 已上传 " + e.bytesLoaded + " 字节，共 " + e.bytesTotal + " 字节";
var proc:uint=e.bytesLoaded / e.bytesTotal * 100;
bar.setProgress(proc,100);
bar.label="当前进度: " + " " + proc + "%";
if (e.bytesLoaded == e.bytesTotal)
{
CursorManager.removeBusyCursor();
}
}
//上传图片到服务器
private function proceedWithUpload(e:CloseEvent):void
{
if (e.detail == Alert.YES)
{
//进度监听
file.addEventListener(ProgressEvent.PROGRESS,onProgress);
var request:URLRequest=new URLRequest("http://localhost:8080/photoupload/FileUploaded");
//设置鼠标忙状态
CursorManager.setBusyCursor();
try
{
file.upload(request);
Alert.show("恭喜你，上传成功");
}
catch (error:Error)
{
Alert.show("上传失败");
trace("上传失败");
}
}
}
//上传完成调用
private function completeHandle(event:Event):void
{
Alert.show("恭喜你，上传成功");
}
//载入本地图片
private function fileReferenceCompleteHandler(e:Event):void
{
byteArray=file.data;
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,loaderCompleteHandler);
loader.loadBytes(byteArray);
}
//图片载入完成显示在预览框中
private function loaderCompleteHandler(e:Event):void
{
var bitmap:Bitmap=Bitmap(loader.content);
bitmapData=bitmap.bitmapData;
img.source=bitmap;
}
//选择文件动作监听
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="上传"/>
<mx:ProgressBar id="bar"
labelPlacement="bottom"
themeColor="#F20D7A"
minimum="0"
visible="true"
maximum="100"
label="当前进度: 0%"
direction="right"
mode="manual"
width="200"/>
<mx:Button label="上传文件"
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="选择文件"
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代码：
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 {
// 限制文件的上传大小
private int maxPostSize = 100 * 1024 * 1024;
public FileUploaded() {
super();
}
public void destroy() {
super.destroy();
}
protected void processRequest(HttpServletRequest request,
HttpServletResponse response) throws ServletException,IOException {
// 定义文件的上传路径
// String uploadPath=request.getRealPath("/").replaceAll("\","/")+"uploadfile/";
String uploadPath = request.getSession().getServletContext().getRealPath("/")+"uploadfile/";
String relitivePath=request.getContextPath();
System.out.println(uploadPath);
System.out.println(relitivePath);
System.out.println("to upload picture !");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
// 保存文件到服务器中
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() + "结束");
}
}
protected void doGet(HttpServletRequest request,IOException {
processRequest(request,response);
}
protected void doPost(HttpServletRequest request,response);
}
public String getServletInfo() {
return "Short description";
}
}
学了flex有一段时间了，就想着用flex+java做一个上传功能程序，其实flex端大部分代码都是按照别人的给的例子做的，很简单的一个小程序，只是红色标注的地方让我费了挺多时间的，上传的时候都希望上传到服务器的某个文件夹下，String uploadPath = request.getSession().getServletContext().getRealPath("/")+"uploadfile"; 一开始路径设置成这样，结果上传的时候总是在图片上加了一个定义的uploadfile的前缀，郁闷了好长时间，结果在朋友帮助下，找出原因，原来需要加上 “/”这样才Ok了，有时候没错误比有错更让人头疼啊……
