Springmvc文件上传监听

/**
 
  * 重写 parseRequest方法 监听
 
  */
 
 @Override
 
 protected MultipartParsingResult parseRequest(HttpServletRequest request)
 
   throws MultipartException {
 
  System.out.println("MultipartParsingResult:--------------------------"+request);
 
  String encoding = determineEncoding(request);
 
  FileUpload fileUpload = prepareFileUpload(encoding);
 
  fileUpload.setFileSizeMax(-1);
 
   final HttpSession session = request.getSession();
 
   fileUpload.setProgressListener(new ProgressListener() {
 
    @Override
 
    public void update(long pBytesRead,long pContentLength,int pItems) {
 
     try {
 
      Thread.sleep(5);
 
     } catch (InterruptedException e) {
 
      e.printStackTrace();
 
     }
 
     session.setAttribute("pBytesRead",pBytesRead);
 
    }
 
   });
 
  try {
 
   List<FileItem> fileItems = ((ServletFileUpload) fileUpload).parseRequest(request);
 
   return parseFileItems(fileItems,encoding);
 
  } catch (FileUploadBase.SizeLimitExceededException ex) {
 
   throw new MaxUploadSizeExceededException(fileUpload.getSizeMax(),ex);
 
  } catch (FileUploadException ex) {
 
   throw new MultipartException(
 
     "Could not parse multipart servlet request",ex);
 
  }
 
 }