文件上传（无刷新，带进度条，带网速）下载完整
*该程序主要解决带进度，无刷新，带网速计算的上传功能，简单明了，不过是本人愚拙的做法，若有更好的做法介绍介绍java文件
package com.servlet;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileItemIterator;import org.apache.commons.fileupload.FileItemStream;import org.apache.commons.fileupload.FileUploadException;import org.apache.commons.fileupload.ProgressListener;import org.apache.commons.fileupload.servlet.ServletFileUpload;import org.jdom.Document;import org.jdom.Element;import org.jdom.output.Format;import org.jdom.output.XMLOutputter;public class Upload extends HttpServlet {protected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {resp.setContentType("application/xml");final PrintWriter out=resp.getWriter();XMLOutputter pw=new XMLOutputter(Format.getPrettyFormat().setEncoding("iso-8859-1"));Document doc=(Document)req.getSession().getAttribute("msg"+req.getSession().getId())==null?new Document():(Document)req.getSession().getAttribute("msg"+req.getSession().getId());pw.output(doc,out);System.out.println(req.getSession().getAttribute("msg"+req.getSession().getId()));}public void doPost(final HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");final PrintWriter out=response.getWriter();ServletFileUpload upload = new ServletFileUpload();upload.setSizeMax(100*1024*1024);ProgressListener progressListener = new ProgressListener(){ long lastBytes=0; long lastTime=System.currentTimeMillis(); public void update(long pBytesRead, long pContentLength, int pItems) { if (pContentLength == -1) { System.out.println("So far, " + pBytesRead + " bytes have been read."); } else { long stepByte=(pBytesRead-lastBytes)/1024; String bit=""; double stepTime=0f; stepTime=(double) ((System.currentTimeMillis()-lastTime)/1000.0); bit=Math.round(stepByte/stepTime)+"KB/S"; Document doc=new Document(); Element root=new Element("root"); doc.addContent(root); Element file=new Element("file"); file.setAttribute("id",pItems+""); file.setAttribute("uploadBytes", pBytesRead+""); file.setAttribute("totalBtyes", pContentLength+""); file.setAttribute("bit", bit); root.addContent(file); request.getSession().setAttribute("msg"+request.getSession().getId(), doc); } }};upload.setProgressListener(progressListener);try {FileItemIterator iter = upload.getItemIterator(request);while (iter.hasNext()) { FileItemStream item = iter.next();InputStream stream = item.openStream(); if (item.isFormField()) { } else { int tmp=item.getName().lastIndexOf("\\")==-1?0:item.getName().lastIndexOf("\\"); if(item.getName().substring(tmp)!=null&&!item.getName().substring(tmp).equals("")){ String fileName="D:\\upload\\"+item.getName().substring(tmp); FileOutputStream tempFile=new FileOutputStream(fileName); intbuf; while((buf=stream.read())!=-1){ tempFile.write(buf); tempFile.flush(); } tempFile.close(); } }}} catch (FileUploadException e) {e.printStackTrace();}out.close();}} jsp文件
<%@ page language="java" contentType="text/html; charset=gb2312" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script type="text/javascript" src="jquery-1.5.1.min.js"></script><title>带进度的文件上传</title></head> <body> <div style="width:500px; margin:0 auto;"><form action="servlet/Upload" id="form1" name="form1" encType="multipart/form-data"method="post" target="hidden_frame" > <input type="file" id="file1" name="file1" style="width:450"/> <input type="submit" value="上传文件"/> </form></div><iframe name="hidden_frame" id="hidden_frame" style="display: none;"></iframe><divstyle="width: 500px;height:80px;margin:auto;text-align: center;"><div id="msg" style="float: right;"></div><div id="process" style="background-image: url(progress-bg.gif);width: 0px;height: 20px;background-repeat: repeat-x"></div></div></body> </html> <script type="text/javascript"> var startTimer; function checkUpload(){ startTimer=setInterval(function(){ $.ajax({url: "servlet/Upload?ran="+Math.random(),dataType :"xml",success:callback});},1000);} function callback(msg) { var node=$(msg).find("file");var uploadBytes=parseInt(node.attr("uploadBytes"));var totalBtyes=parseInt(node.attr("totalBtyes"));var bit=node.attr("bit");var percentage=Math.round(uploadBytes/totalBtyes*100);tmp="已上传"+percentage+"%网速:"+bit;var wid=parseInt(uploadBytes/totalBtyes)*300;$("#process").css("width",percentage+"%"); $("#msg").html("<font color=red>"+tmp+"</font>");if(percentage==100){if(startTimer!=null){clearInterval(startTimer);}}}</script>
另外需要jdom.jar 包 和jquery.js
实现无刷新带进度条上传文件（可测网速）
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