FLEX带进度指示的文件上传

http://tj007-bo.javaeye.com/blog/128181

FLEX带进度指示的文件上传

无意百度到一个示例代码，贴出来。

FileUploadServlet.java源码：

package com.fire.servlet;

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;

public class FileUploadServlet extends HttpServlet {

 // 定义文件的上传路径
 private String uploadPath = "D://upload//";

 // 限制文件的上传大小
 private int maxPostSize = 100 * 1024 * 1024;

 public FileUploadServlet() {
  super();
 }

 public void destroy() {
  super.destroy();
 }

  public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  
  //得到用户需要保存的服装的id
  String dressId = request.getParameter("dressID");
  System.out.println(dressId);
  
  //保存文件到服务器中
  response.setContentType("text/html; charset=UTF-8");
  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));
     }
     catch (Exception e)
     {
      e.printStackTrace();
     }
    }
   }
  }
  catch (FileUploadException e)
  {
   e.printStackTrace();
  }
 }

  public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  doGet(request, response);
 }

 public void init() throws ServletException {
  // Put your code here
 }

}

fileupload.mxml源码：

<mx:application xmlns="*" layout="absolute" xmlns:mx="http://www.adobe.com/2006/mxml" creationcomplete="init();"> </mx:application>

xml 代码

1. xml version="1.0" encoding="utf-8"?>  
2. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns="*" creationComplete="init();">  
3.     <mx:Script>  
4.           
5.              import flash.net.FileReference;  
6.              import mx.controls.Alert;  
7.              import mx.events.CloseEvent;  
8.              import flash.events.*;  
9.    
10.              private var file: FileReference;  
11.    
12.              private function init(): void{  
13.                  Security.allowDomain("*");  
14.                  file = new FileReference();  
15.                  file.addEventListener(ProgressEvent.PROGRESS, onProgress);  
16.                  file.addEventListener(Event.SELECT, onSelect);  
17.              }  
18.    
19.              private function upload(): void{  
20.                  file.browse();  
21.              }  
22.                
23.              private function onSelect(e: Event): void{  
24.                  Alert.show("上传 " + file.name + " (共 "+Math.round(file.size)+" 字节)?",  
25.                             "确认上传",  
26.                             Alert.YES|Alert.NO,  
27.                             null,  
28.                             proceedWithUpload);  
29.              }  
30.                
31.              private function onProgress(e: ProgressEvent): void{  
32.                  lbProgress.text = " 已上传 " + e.bytesLoaded   
33.                      + " 字节，共 " + e.bytesTotal + " 字节";  
34.                  var proc: uint = e.bytesLoaded / e.bytesTotal * 100;  
35.                  bar.setProgress(proc, 100);  
36.                   bar.label= "当前进度: " + " " + proc + "%";  
37.              }  
38.                
39.              private function proceedWithUpload(e: CloseEvent): void{  
40.                  if (e.detail == Alert.YES){  
41.                      var request: URLRequest = new URLRequest("http://localhost:8080/dress/fileUploadServlet");  
42.                      try {  
43.                          file.upload(request);  
44.                      } catch (error:Error) {  
45.                          trace("上传失败");  
46.                      }  
47.                        
48.                  }  
49.              }  
50.          ]]>  
51.      mx:Script>  
52.         
53.      <mx:Canvas width="100%" height="100%">  
54.          <mx:VBox width="100%" horizontalAlign="center">  
55.              <mx:Label id="lbProgress" text="上传"/>  
56.               <mx:ProgressBar id="bar" labelPlacement="bottom" themeColor="#F20D7A"  
57.                  minimum="0" visible="true" maximum="100" label="当前进度: 0%"     
58.                  direction="right" mode="manual" width="200"/>  
59.              <mx:Button label="上传文件" click="upload();"/>               
60.          mx:VBox>  
61.      mx:Canvas>  
62. mx:Application>