public void save(HttpServletRequest request,HttpServletResponse response)     throws Exception { 

    String temp = getServletContext().getRealPath("/temp"); // 上传时存放临时文件的目录

   String uploadDir = getServletContext().getRealPath("/upload"); // 上传文件存放的目录

DiskFileUpload diskFileUpload = new DiskFileUpload(); 

    diskFileUpload.setSizeMax(1*1024*1024); // 设置允许用户上传文件大小,单位:字节

    diskFileUpload.setSizeThreshold(4096);  // 设置最多只允许在内存中存储的数据,单位:字节

    diskFileUpload.setRepositoryPath(temp); // 设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录

//开始读取上传信息

    List fileItems = diskFileUpload.parseRequest(request); 

    Iterator iter = fileItems.iterator(); // 依次处理每个上传的文件

   while (iter.hasNext()) { 

        FileItem item = (FileItem) iter.next(); // 忽略其他不是文件域的所有表单信息

if(!item.isFormField()) { 

            String name = item.getName(); // 获取上传文件名,包括路径

            name = name.substring(name.lastIndexOf("\\") + 1); // 从全路径中提取文件名

           long size = item.getSize(); 

            if (name != null && !name.equals("") && size != 0) {

           String filePath = System.currentTimeMillis() + "_" + name; 

                item.write(new File(uploadDir, filePath));

                Upload upload = new Upload();

                upload.setFileName(name);

                upload.setFilePath("upload/" + filePath);

                upload.setFileSize(size);

                upload.setAddDate(new Date()); 

                list.add(upload); 

            } 

        } 

    }