带进度条的js文件上传

package com.sohu.action; 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.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.ProgressListener; import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; /** * Servlet implementation class Upload */ @WebServlet("/Upload") public class Upload extends HttpServlet { private static final long serialVersionUID = 1L; /** * Default constructor. */ public Upload() { // TODO Auto-generated constructor stub super(); } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); //设置字符编码为UTF-8，支持汉字显示 response.setCharacterEncoding("UTF-8"); final long MAX_SIZE = 1024 * 1024 * 1024;//设置上传文件最大为1G //上传文件路径 String filePath = "e:\\upload\\"; String tempPath = "e:\\upload\\temp\\"; //jsonp上传 String jsonp = request.getParameter("callback"); // 实例化一个硬盘文件工厂,用来配置上传组件ServletFileUpload DiskFileItemFactory dfif = new DiskFileItemFactory(); dfif.setSizeThreshold(1024 * 5);// 设置上传文件时用于临时存放文件的内存大小,这里是5k.多于的部分将临时存在硬盘 dfif.setRepository(new File(tempPath));// 设置存放临时文件的目录 //用以上工厂实例化上传组件 ServletFileUpload sfu = new ServletFileUpload(dfif); //设置最大上传尺寸 sfu.setSizeMax(MAX_SIZE); PrintWriter out = response.getWriter(); final HttpSession session = request.getSession(); sfu.setProgressListener(new ProgressListener() { private long temp = -1; public void update(long readBytes, long totalBytes, int item) { long size = readBytes / 1024 * 1024 * 10; if(temp == size){ return; } temp = size; if (readBytes != -1) { session.setAttribute("readBytes", "" + readBytes); session.setAttribute("totalBytes", "" + totalBytes); } } }); //从request得到 所有 上传域的列表 List fileList = null; try { fileList = sfu.parseRequest(request); } catch (FileUploadException e) {//处理文件尺寸过大异常 if (e instanceof SizeLimitExceededException) { if(null != jsonp && !"".equals(jsonp)){ out.println("<script type='text/javascript' id='" + jsonp + "'>parent." + jsonp + "({statusText:'上传文件大小不能超过1G'});setTimeout(function(){delete parent." + jsonp + ";var s=document.getElementById('" + jsonp + "');s.parentNode.removeChild(s);},50);</script>"); }else{ out.println("上传文件大小不能超过1G"); } return; } e.printStackTrace(); } //没有选择上传文件 if (fileList == null || fileList.size() == 0) { if(null != jsonp && !"".equals(jsonp)){ out.println("<script type='text/javascript' id='" + jsonp + "'>parent." + jsonp + "({statusText:'请选择上传文件'});setTimeout(function(){delete parent." + jsonp + ";var s=document.getElementById('" + jsonp + "');s.parentNode.removeChild(s);},50);</script>"); }else{ out.println("请选择上传文件"); } return; } //得到所有上传的文件 Iterator fileItr = fileList.iterator(); //循环处理所有文件 while (fileItr.hasNext()) { FileItem fileItem = null; String path = null; double size = 0; //得到当前文件 fileItem = (FileItem) fileItr.next(); //忽略简单form字段而不是上传域的文件域(<input type="text" />等) if (fileItem == null || fileItem.isFormField()) { continue; } //得到文件的完整路径 path = fileItem.getName(); //得到文件的大小 size = fileItem.getSize(); if ("".equals(path) || size == 0) { if(null != jsonp && !"".equals(jsonp)){ out.println("<script type='text/javascript' id='" + jsonp + "'>parent." + jsonp + "({statusText:'请选择上传文件'});setTimeout(function(){delete parent." + jsonp + ";var s=document.getElementById('" + jsonp + "');s.parentNode.removeChild(s);},50);</script>"); }else{ out.println("请选择上传文件"); } return; } //得到去除路径的文件名 String t_name = path.substring(path.lastIndexOf("\\") + 1); //得到文件的扩展名(无扩展名时将得到全名) String t_ext = t_name.substring(t_name.lastIndexOf(".") + 1); //保存的最终文件完整路径,保存在e盘upload目录下 String u_name = filePath + t_name + "." + t_ext; String u_size = ""; try { //保存文件 fileItem.write(new File(u_name)); if(size > 1024 * 1024) u_size = (float)Math.round(size * 100 / (1024 * 1024)) / 100 + "MB"; else u_size = (float)Math.round(size * 100 / 1024) / 100 + "KB"; if(null != jsonp && !"".equals(jsonp)){ out.println("<script type='text/javascript' id='" + jsonp + "'>parent." + jsonp + "({statusText:'文件名：" + t_name + "<br/>上传完成。<br/>文件大小：" + u_size + "'});setTimeout(function(){delete parent." + jsonp + ";var s=document.getElementById('" + jsonp + "');s.parentNode.removeChild(s);},50);</script>"); }else{ out.println("文件名：" + t_name + "<br/>上传完成。<br/>文件大小：" + u_size); } } catch (Exception e) { e.printStackTrace(); } } } }