IOS后台文件上传

public ModelAndView GetImage(HttpServletRequest request,
   HttpServletResponse response) throws Exception {
  Map<String, Object> maps = new HashMap<String, Object>();

try {
   // 创建一个临时文件存放要上传的文件，第一个参数为上传文件大小，第二个参数为存放的临时目录
   DiskFileItemFactory factory = new DiskFileItemFactory(
     1024 * 1024 * 5, new File(“D:\\temp1”));
   // 设置缓冲区大小为 5M
   factory.setSizeThreshold(1024 * 1024 * 5);
   // 创建一个文件上传的句柄
   ServletFileUpload upload = new ServletFileUpload(factory);

// 设置上传文件的整个大小和上传的单个文件大小
   upload.setSizeMax(1024 * 1024 * 50);
   upload.setFileSizeMax(1024 * 1024 * 5);

try {
    // 把页面表单中的每一个表单元素解析成一个FileItem
    List<FileItem> items = upload.parseRequest(request);
    for (FileItem fileItem : items) {
     // 如果是一个普通的表单元素(type不是file的表单元素)
     if (fileItem.isFormField()) {
      System.out.println(fileItem.getFieldName()); // 得到对应表单元素的名字
      System.out.println(fileItem.getString()); // 得到表单元素的值
     } else {

// 获取文件的后缀名
      String fileName = fileItem.getName();// 得到文件的名字
      String fileExt = fileName.substring(
        fileName.lastIndexOf(“.”) + 1,
        fileName.length());
      String a = System.currentTimeMillis() + “”;
      String path = request.getRealPath(“/”) + “kmtp/”
        + “IOS” + a + “.jpg”;
      String url = “http://” + request.getServerName() + “:”
        + request.getServerPort() + “/”
        + request.getContextPath() + “kmtp/” + “IOS”
        + a + “.jpg”;
      String extension = path.substring(
        path.lastIndexOf(“.”) + 1, path.length());
      Pattern pattern = Pattern.compile(“bmp|gif|gepg|png|”);
      Matcher matcher = pattern.matcher(extension);
      if (matcher.find()) {
       try {

fileItem.write(new File(path));
        maps.put(“message”, url);
       } catch (Exception e) {
        e.printStackTrace();
        maps.put(“message”, “0”);
       }
      } else {
       System.out.println(“该文件类型不能够上传”);
       maps.put(“message”, “0”);
      }
     }
    }
   } catch (FileUploadBase.SizeLimitExceededException e) {
    System.out.println(“整个请求的大小超过了规定的大小…”);
    maps.put(“message”, “0”);
   } catch (FileUploadBase.FileSizeLimitExceededException e) {
    System.out.println(“请求中一个上传文件的大小超过了规定的大小…”);
    maps.put(“message”, “0”);
   } catch (FileUploadException e) {
    e.printStackTrace();
    maps.put(“message”, “0”);
   }

} catch (Exception e) {
   logger.error(e.getStackTrace());
   e.printStackTrace();
   maps.put(“message”, “0”);

}
  // 返回结果 0系统错误，
  response.getWriter().write(
    URLEncoder.encode(JSONObject.fromObject(maps).toString(),
      “UTF-8”));
  return null;
 }