ajax文件上传进度条

package servlet; import help.MyProgressListener; import java.io.File; import java.io.IOException; 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; public class FileUploadServlet extends HttpServlet{ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doPost(request, response); } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub] boolean isMultipart = ServletFileUpload.isMultipartContent(request); System.out.println("isMultipart:"+isMultipart); System.out.println("tempdir:"+System.getProperty("java.io.tmpdir")); System.out.println("size:"+request.getContentLength()/1024+"kb"); DiskFileItemFactory factory = new DiskFileItemFactory(); //factory.setSizeThreshold(10*1000); ServletFileUpload upload = new ServletFileUpload(factory); upload.setProgressListener(new MyProgressListener(request)); //upload.setFileSizeMax(10*1000*1000); try { List items = upload.parseRequest(request); System.out.println("items length:"+items.size()); Iterator iter = items.iterator(); while(iter.hasNext()){ FileItem item = (FileItem)iter.next(); if(item.isFormField()){ System.out.println("Field Name:"+item.getFieldName()); }else{ File file = new File(System.getProperty("java.io.tmpdir")+"\\"+item.getName()); item.write(file); } } } catch (FileUploadException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }