java进行文件上传，带进度条

网上看到别人发过的一个java上传的代码，自己写了个完整的，附带源码

项目环境：jkd7、tomcat7、

jar包：commons-fileupload-1.2.1.jar、commons-io-1.4.jar

项目结构：

index.jsp 代码

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML>
<html>
  <head>
    <base href="<%=basePath%>">
    <title>java进行文件上传，带进度条</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <script type="text/javascript" src="js/jquery-1.8.3.js"></script>
    <script type="text/javascript">
        var over = false;
        var inter;
        function upload(){
            over = false;
            $("#state").html("")
            $("#progress").css("width","0")
            $("input[type=submit]").attr("disabled",true);
            $("#progress").css("width","0%");
            $("#state").html("正在上传... 总大小：0MB，已上传：0MB，0%，已用时：0秒，剩余时间：0秒，速度：0KB/S");
            inter = setInterval(req,1000);
        }
        function req(){
            //如果上传已经完成
            if(over){
                clearInterval(inter);
                return;
            }
            var url = "upload/AjaxServlet";
            $.get(url,function(date){
                var state = date.split("-");
                $("#state").html("正在上传... 总大小："+state[4]+"MB，已上传："+state[3]+"MB，"+state[2]+"%，已用时："+state[0]+"秒，剩余时间："+state[5]+"秒，速度："+state[1]+"KB/S");
                $("#progress").animate({width:state[2]+"%"},500);
                if(state[3] == state[4]){
                    over = true;
                    $("input[type=submit]").attr("disabled",false);
                    $("#state").html("上传已完成，总大小："+state[4]+"MB，已上传："+state[3]+"MB，"+state[2]+"%，已用时："+state[0]+"秒，剩余时间："+state[5]+"秒，速度："+state[1]+"KB/S");
                }
            });
        }
    </script>
  </head>

  <body>
      <form action="servlet/Upload" method="post" enctype="multipart/form-data" target="upload_iframe" onsubmit="upload()">
          <p><input type="file" name="file" id="file"></p>
          <p><input type="submit" value="上传文件"></p>
      </form>
      <iframe name="upload_iframe" width="0" height="0" frameborder="0"></iframe>
      <div id="state">
      </div>
      <div id="progress" style="background: #728820; height: 10px; width: 0">
      </div>
  </body>
</html>

index.jsp

package com.sevennight.entity

 package com.sevennight.entity;

 public class Upload {
     private long totalSize;                                        //总大小
     private long startTime = System.currentTimeMillis();        //开始时间
     private long uploadSize;                                    //已上传的大小
     public long getTotalSize() {
         return totalSize;
     }
     public void setTotalSize(long totalSize) {
         this.totalSize = totalSize;
     }
     public long getStartTime() {
         return startTime;
     }
     public void setStartTime(long startTime) {
         this.startTime = startTime;
     }
     public long getUploadSize() {
         return uploadSize;
     }
     public void setUploadSize(long uploadSize) {
         this.uploadSize = uploadSize;
     }
 }

Upload.java

com.sevennight.lister

package com.sevennight.lister;

import org.apache.commons.fileupload.ProgressListener;

import com.sevennight.entity.Upload;

public class UploadLister implements ProgressListener{
    private Upload upload = null;

    public UploadLister(Upload upload){
        this.upload = upload;
    }

    public void update(long uploadSize,long totalSize,int items) {
        upload.setUploadSize(uploadSize);
        upload.setTotalSize(totalSize);
    }
}

UploadLister.java

com.sevennight.servlet

 package com.sevennight.servlet;

 import java.io.IOException;
 import java.io.PrintWriter;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import com.sevennight.entity.Upload;

 @SuppressWarnings("serial")
 public class AjaxServlet extends HttpServlet {

     public AjaxServlet() {
         super();
     }

     public void destroy() {
         super.destroy(); // Just puts "destroy" string in log
         // Put your code here
     }

     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         response.setHeader("Cache-Control", "no-store");// 禁止浏览器缓存
         response.setHeader("Pragrma", "no-cache");// 禁止浏览器缓存
         response.setDateHeader("Expires", 0);// 禁止浏览器缓存
         response.setContentType("text/html");
         PrintWriter out = response.getWriter();
         Upload upload = null;
         upload = (Upload)request.getSession().getAttribute("upload");
         if(null == upload)
             return;
         long currentTime = System.currentTimeMillis();
         //计算已用时，以S为单位
         long time = (currentTime - upload.getStartTime()) / 1000 + 1;
         //计算速度,以kb为单位
         long speed = (long)(double)upload.getUploadSize() / 1024 / time;
         //计算百分比
         int percent =  (int)((double)upload.getUploadSize() / (double)upload.getTotalSize() * 100);
         //已经完成
         int mb = (int)upload.getUploadSize() / 1024 / 1024;
         //总共有多少
         int totalMb = (int)upload.getTotalSize() / 1024 / 1024;
         //剩余时间
         int shenYu =  (int)((upload.getTotalSize() - upload.getUploadSize()) / 1024 / speed);
         String str = time+"-"+speed+"-"+percent+"-"+mb+"-"+totalMb+"-"+shenYu;
         out.print(str);
         out.flush();
         out.close();
     }

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

         response.setContentType("text/html");
         PrintWriter out = response.getWriter();
         out
                 .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
         out.println("<HTML>");
         out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
         out.println("  <BODY>");
         out.print("    This is ");
         out.print(this.getClass());
         out.println(", using the POST method");
         out.println("  </BODY>");
         out.println("</HTML>");
         out.flush();
         out.close();
     }

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

 }

AjaxServlet.java

 package com.sevennight.servlet;

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

 import com.sevennight.lister.UploadLister;

 @SuppressWarnings("serial")
 public class Upload extends HttpServlet {

     public Upload() {
         super();
     }

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

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

         response.setContentType("text/html");
         PrintWriter out = response.getWriter();
         out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
         out.println("<HTML>");
         out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
         out.println("  <BODY>");
         out.print("    This is ");
         out.print(this.getClass());
         out.println(", using the GET method");
         out.println("  </BODY>");
         out.println("</HTML>");
         out.flush();
         out.close();
     }

     @SuppressWarnings({ "deprecation", "unchecked" })
     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         response.setContentType("text/html");
         PrintWriter out = response.getWriter();

         com.sevennight.entity.Upload upload = new com.sevennight.entity.Upload();

         UploadLister lister = new UploadLister(upload);

         ServletFileUpload servletFileUpload = new ServletFileUpload(new DiskFileItemFactory());

         //只是上传监听器
         servletFileUpload.setProgressListener(lister);

         request.getSession().setAttribute("upload", upload);

         List list = null;
         try {
             list = servletFileUpload.parseRequest(request);
         } catch (FileUploadException e) {
             e.printStackTrace();
         }

         for(Iterator iter = list.iterator(); iter.hasNext();){
             //得到文件对象
             FileItem fileItem = (FileItem)iter.next();
             //是表单才进行处理
             if(fileItem.isFormField()){
                 break;
             }
             //同意linux和windows的路径分隔符
             String name = fileItem.getName().replaceAll("/", "\\");
             //得到文件名
             int index = name.lastIndexOf("\\");
             String fileFileName = "";
             if(index == -1){
                 fileFileName = name;
             }else{
                 fileFileName = name.substring(index + 1);
             }

             InputStream fileInputStream = fileItem.getInputStream();

             String path = request.getRealPath("/upload");
             System.out.println("上传路径：----->"+path);
             //也可不用自己写实现方法直接使用,fileItem.write(uploadFile);
             File uploadFile = new File(path,fileFileName);
             //首先要确认路径是否存在
             uploadFile.getParentFile().mkdirs();
             //检查文件是否已经存在
             if(!uploadFile.exists()){
                 //建立文件
                 uploadFile.createNewFile();
             }
             FileOutputStream out2 = new FileOutputStream(uploadFile);
             //开始copy文件

             @SuppressWarnings("unused")
             int len = 0;//每次读取的字节数
             byte[] bytes = new byte[1024];
             while((len = fileInputStream.read(bytes, 0, bytes.length)) != -1){
                 out2.write(bytes);
             }
             out2.flush();
             out2.close();
             fileInputStream.close();
         }
         out.flush();
         out.close();
     }

     public void init() throws ServletException {
     }

 }

Upload.java

xml

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app version="2.5"
     xmlns="http://java.sun.com/xml/ns/javaee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

   <servlet>
     <servlet-name>AjaxServlet</servlet-name>
     <servlet-class>com.sevennight.servlet.AjaxServlet</servlet-class>
   </servlet>
   <servlet>
     <servlet-name>Upload</servlet-name>
     <servlet-class>com.sevennight.servlet.Upload</servlet-class>
   </servlet>

   <servlet-mapping>
     <servlet-name>AjaxServlet</servlet-name>
     <url-pattern>/upload/AjaxServlet</url-pattern>
   </servlet-mapping>
   <servlet-mapping>
     <servlet-name>Upload</servlet-name>
     <url-pattern>/servlet/Upload</url-pattern>
   </servlet-mapping>

   <welcome-file-list>
     <welcome-file>upload.jsp</welcome-file>
   </welcome-file-list>
 </web-app>

web.xml

源码地址：http://pan.baidu.com/s/1i3JxC5v

效果图: