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>
package com.sevennight.entity
1 package com.sevennight.entity; 2 3 public class Upload { 4 private long totalSize; //总大小 5 private long startTime = System.currentTimeMillis(); //开始时间 6 private long uploadSize; //已上传的大小 7 public long getTotalSize() { 8 return totalSize; 9 } 10 public void setTotalSize(long totalSize) { 11 this.totalSize = totalSize; 12 } 13 public long getStartTime() { 14 return startTime; 15 } 16 public void setStartTime(long startTime) { 17 this.startTime = startTime; 18 } 19 public long getUploadSize() { 20 return uploadSize; 21 } 22 public void setUploadSize(long uploadSize) { 23 this.uploadSize = uploadSize; 24 } 25 }
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); } }
com.sevennight.servlet
1 package com.sevennight.servlet; 2 3 import java.io.IOException; 4 import java.io.PrintWriter; 5 6 import javax.servlet.ServletException; 7 import javax.servlet.http.HttpServlet; 8 import javax.servlet.http.HttpServletRequest; 9 import javax.servlet.http.HttpServletResponse; 10 11 import com.sevennight.entity.Upload; 12 13 @SuppressWarnings("serial") 14 public class AjaxServlet extends HttpServlet { 15 16 public AjaxServlet() { 17 super(); 18 } 19 20 public void destroy() { 21 super.destroy(); // Just puts "destroy" string in log 22 // Put your code here 23 } 24 25 public void doGet(HttpServletRequest request, HttpServletResponse response) 26 throws ServletException, IOException { 27 response.setHeader("Cache-Control", "no-store");// 禁止浏览器缓存 28 response.setHeader("Pragrma", "no-cache");// 禁止浏览器缓存 29 response.setDateHeader("Expires", 0);// 禁止浏览器缓存 30 response.setContentType("text/html"); 31 PrintWriter out = response.getWriter(); 32 Upload upload = null; 33 upload = (Upload)request.getSession().getAttribute("upload"); 34 if(null == upload) 35 return; 36 long currentTime = System.currentTimeMillis(); 37 //计算已用时，以S为单位 38 long time = (currentTime - upload.getStartTime()) / 1000 + 1; 39 //计算速度,以kb为单位 40 long speed = (long)(double)upload.getUploadSize() / 1024 / time; 41 //计算百分比 42 int percent = (int)((double)upload.getUploadSize() / (double)upload.getTotalSize() * 100); 43 //已经完成 44 int mb = (int)upload.getUploadSize() / 1024 / 1024; 45 //总共有多少 46 int totalMb = (int)upload.getTotalSize() / 1024 / 1024; 47 //剩余时间 48 int shenYu = (int)((upload.getTotalSize() - upload.getUploadSize()) / 1024 / speed); 49 String str = time+"-"+speed+"-"+percent+"-"+mb+"-"+totalMb+"-"+shenYu; 50 out.print(str); 51 out.flush(); 52 out.close(); 53 } 54 55 public void doPost(HttpServletRequest request, HttpServletResponse response) 56 throws ServletException, IOException { 57 58 response.setContentType("text/html"); 59 PrintWriter out = response.getWriter(); 60 out 61 .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); 62 out.println("<HTML>"); 63 out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 64 out.println(" <BODY>"); 65 out.print(" This is "); 66 out.print(this.getClass()); 67 out.println(", using the POST method"); 68 out.println(" </BODY>"); 69 out.println("</HTML>"); 70 out.flush(); 71 out.close(); 72 } 73 74 public void init() throws ServletException { 75 // Put your code here 76 } 77 78 }
1 package com.sevennight.servlet; 2 3 import java.io.File; 4 import java.io.FileOutputStream; 5 import java.io.IOException; 6 import java.io.InputStream; 7 import java.io.PrintWriter; 8 import java.util.Iterator; 9 import java.util.List; 10 11 import javax.servlet.ServletException; 12 import javax.servlet.http.HttpServlet; 13 import javax.servlet.http.HttpServletRequest; 14 import javax.servlet.http.HttpServletResponse; 15 16 import org.apache.commons.fileupload.FileItem; 17 import org.apache.commons.fileupload.FileUploadException; 18 import org.apache.commons.fileupload.disk.DiskFileItemFactory; 19 import org.apache.commons.fileupload.servlet.ServletFileUpload; 20 21 import com.sevennight.lister.UploadLister; 22 23 @SuppressWarnings("serial") 24 public class Upload extends HttpServlet { 25 26 public Upload() { 27 super(); 28 } 29 30 public void destroy() { 31 super.destroy(); 32 } 33 34 public void doGet(HttpServletRequest request, HttpServletResponse response) 35 throws ServletException, IOException { 36 37 response.setContentType("text/html"); 38 PrintWriter out = response.getWriter(); 39 out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">"); 40 out.println("<HTML>"); 41 out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); 42 out.println(" <BODY>"); 43 out.print(" This is "); 44 out.print(this.getClass()); 45 out.println(", using the GET method"); 46 out.println(" </BODY>"); 47 out.println("</HTML>"); 48 out.flush(); 49 out.close(); 50 } 51 52 @SuppressWarnings({ "deprecation", "unchecked" }) 53 public void doPost(HttpServletRequest request, HttpServletResponse response) 54 throws ServletException, IOException { 55 56 response.setContentType("text/html"); 57 PrintWriter out = response.getWriter(); 58 59 com.sevennight.entity.Upload upload = new com.sevennight.entity.Upload(); 60 61 UploadLister lister = new UploadLister(upload); 62 63 ServletFileUpload servletFileUpload = new ServletFileUpload(new DiskFileItemFactory()); 64 65 //只是上传监听器 66 servletFileUpload.setProgressListener(lister); 67 68 request.getSession().setAttribute("upload", upload); 69 70 List list = null; 71 try { 72 list = servletFileUpload.parseRequest(request); 73 } catch (FileUploadException e) { 74 e.printStackTrace(); 75 } 76 77 for(Iterator iter = list.iterator(); iter.hasNext();){ 78 //得到文件对象 79 FileItem fileItem = (FileItem)iter.next(); 80 //是表单才进行处理 81 if(fileItem.isFormField()){ 82 break; 83 } 84 //同意linux和windows的路径分隔符 85 String name = fileItem.getName().replaceAll("/", "\\"); 86 //得到文件名 87 int index = name.lastIndexOf("\\"); 88 String fileFileName = ""; 89 if(index == -1){ 90 fileFileName = name; 91 }else{ 92 fileFileName = name.substring(index + 1); 93 } 94 95 InputStream fileInputStream = fileItem.getInputStream(); 96 97 String path = request.getRealPath("/upload"); 98 System.out.println("上传路径：----->"+path); 99 //也可不用自己写实现方法直接使用,fileItem.write(uploadFile); 100 File uploadFile = new File(path,fileFileName); 101 //首先要确认路径是否存在 102 uploadFile.getParentFile().mkdirs(); 103 //检查文件是否已经存在 104 if(!uploadFile.exists()){ 105 //建立文件 106 uploadFile.createNewFile(); 107 } 108 FileOutputStream out2 = new FileOutputStream(uploadFile); 109 //开始copy文件 110 111 @SuppressWarnings("unused") 112 int len = 0;//每次读取的字节数 113 byte[] bytes = new byte[1024]; 114 while((len = fileInputStream.read(bytes, 0, bytes.length)) != -1){ 115 out2.write(bytes); 116 } 117 out2.flush(); 118 out2.close(); 119 fileInputStream.close(); 120 } 121 out.flush(); 122 out.close(); 123 } 124 125 public void init() throws ServletException { 126 } 127 128 }
xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app version="2.5" 3 xmlns="http://java.sun.com/xml/ns/javaee" 4 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 5 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 6 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 7 8 <servlet> 9 <servlet-name>AjaxServlet</servlet-name> 10 <servlet-class>com.sevennight.servlet.AjaxServlet</servlet-class> 11 </servlet> 12 <servlet> 13 <servlet-name>Upload</servlet-name> 14 <servlet-class>com.sevennight.servlet.Upload</servlet-class> 15 </servlet> 16 17 18 <servlet-mapping> 19 <servlet-name>AjaxServlet</servlet-name> 20 <url-pattern>/upload/AjaxServlet</url-pattern> 21 </servlet-mapping> 22 <servlet-mapping> 23 <servlet-name>Upload</servlet-name> 24 <url-pattern>/servlet/Upload</url-pattern> 25 </servlet-mapping> 26 27 <welcome-file-list> 28 <welcome-file>upload.jsp</welcome-file> 29 </welcome-file-list> 30 </web-app>
源码地址：http://pan.baidu.com/s/1i3JxC5v
效果图:
