java使用FileUpload实现有进度条的文件上传功能.doc

先看看效果：页面： base href= java进行文件上传，带进度条 var over = false;var inter;function upload()over = false;$(#state).html()$(#progress).css(width,0)$(inputtype=submit).attr(disabled,true);$(#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(-);$(#state).html(正在上传. 总大小：+state4+MB，已上传：+state3+MB，+state2+%，已用时：+state0+秒，剩余时间：+state5+秒，速度：+state1+KB/S);$(#progress).animate(width:state2+%,500);if(state3 = state4)over = true;$(inputtype=submit).attr(disabled,false);$(#state).html(上传已完成，总大小：+state4+MB，已上传：+state3+MB，+state2+%，已用时：+state0+秒，剩余时间：+state5+秒，速度：+state1+KB/S);); ：AjaxServlet.javapackage com.hongfei.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.hongfei.entity.Upload;SuppressWarnings(serial)public class AjaxServlet extends HttpServlet /* * Constructor of the object. */public AjaxServlet() super();/* * Destruction of the servlet. */public void destroy() super.destroy(); / Just puts destroy string in log/ Put your code here/* * The doGet method of the servlet. * * This method is called when a form has its tag value method equals to get. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */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();/* * The doPost method of the servlet. * * This method is called when a form has its tag value method equals to post. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException response.setContentType(text/html);PrintWriter out = response.getWriter();out.println();out.println();out.println( A Servlet);out.println( );out.print( This is );out.print(this.getClass();out.println(, using the POST method);out.println( );out.println();out.flush();out.close();/* * Initialization of the servlet. * * throws ServletException if an error occurs */public void init() throws ServletException / Put your code hereUpload.javapackage com.hongfei.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 mons.fileupload.FileItem;import mons.fileupload.FileUploadException;import mons.fileupload.disk.DiskFileItemFactory;import mons.fileupload.servlet.ServletFileUpload;import com.hongfei.lister.UploadLister;SuppressWarnings(serial)public class Upload extends HttpServlet /* * Constructor of the object. */public Upload() super();/* * Destruction of the servlet. */public void destroy() super.destroy(); / Just puts destroy string in log/ Put your code here/* * The doGet method of the servlet. * * This method is called when a form has its tag value method equals to get. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException response.setContentType(text/html);PrintWriter out = response.getWriter();out.println();out.println();out.println( A Servlet);out.println( );out.print( This is );out.print(this.getClass();out.println(, using the GET method);out.println( );out.println();out.flush();out.close();/* * The doPost method of the servlet. * * This method is called when a form has its tag value method equals to post. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */SuppressWarnings( deprecation, unchecked )public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException response.setContentType(text/html);PrintWriter out = response.getWriter();com.hongfei.entity.Upload upload = new com.hongfei.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;elsefileFileName = name.substring(index + 1);InputStream fileInputStream = fileItem.getInputStream();String path = request.getRealPath(/upload);/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 byte1024; while(len = fileInputStream.read(bytes, 0, bytes.length) != -1)out2.write(bytes);out2.flush();out2.close();fileInputStream.close();out.flush();out.close();/* * Initialization of the servlet. * * throws ServletException if an error occurs */public void init() throws ServletException / Put your code here：监听UploadLister.javapackage com.hongfei.lister;import mons.fileupload.ProgressListener;import com.hongfei.entity.Upload;public class UploadLister implements ProgressListenerprivate Upload upload = null;public UploadLister(Upload upload)this.upload = upload