无法获取多重文件上传中每个文件的文件大小

Question

我一次上传了多个文件。我在Java端使用Apache Commons文件上传，我需要单个文件的文件大小。但是，我正在获得总内容的大小。 Java代码：：

public ModelAndView addDocument(HttpServletRequest request, HttpServletResponse response){
        // find the file size..
        LOG.debug("Request Content length: "+request.getContentLength());
        String mainInd = request.getParameter("main");
        String supportInd = request.getParameter("support");
        int contentLength = request.getContentLength();
        System.out.println("Content Length :: " + contentLength);
        if (mainInd != null && "main".equalsIgnoreCase(mainInd))
        {
        if(FileSizeUtility.isMaxFileSizeExceeded(contentLength)){
            ModelAndView mav = new ModelAndView("ajaxresponse/filesUploaded");
            mav.addObject("success", "false");
            mav.addObject("fileList", new ArrayList());
            mav.addObject("totalCount", 0);
            mav.addObject("message", AppConfig.getInstance().get("upload.file.exceed"));
            return mav;
        } 
        }

        if (supportInd != null && "support".equalsIgnoreCase(supportInd))
        {
        if(FileSizeUtility.isMaxSupFileSizeExceeded(contentLength)){
            ModelAndView mav = new ModelAndView("ajaxresponse/filesUploaded");
            mav.addObject("success", "false");
            mav.addObject("message", AppConfig.getInstance().get("upload.sup.file.exceed"));
            return mav;
        } 
        }


        System.out.println("Content Length check :: " + FileSizeUtility.isMaxSupFileSizeExceeded(contentLength));
        System.out.println("Support Inc :: " + supportInd);
        LOG.debug("restricted files names: "+ddxExpnList);
        //time to know the upload duration
        Date time1 = new Date();        
        String rptTempDirPath = TEMP_PATH + new Date().getTime();
        File rptTempDir = new File(rptTempDirPath);
        //temp dir created for upload file.
        rptTempDir.mkdirs();
        LOG.debug("temp path for upload:"+rptTempDirPath);
        // Check that we have a file upload request
        boolean isMultipart = ServletFileUpload.isMultipartContent(request);
        System.out.println("isMultipart="+isMultipart);
        //ERS-62
        DiskFileItemFactory factory = new DiskFileItemFactory();
          // maximum size that will be stored in memory
          factory.setSizeThreshold(MAX_MEM_SIZE_DOWNLOAD);
          if(rptTempDir.exists()){
          // Location to save data that is larger than maxMemSize.
              factory.setRepository(rptTempDir);
          }
          // Create a new file upload handler
        ServletFileUpload upload = new ServletFileUpload(factory);
        List<RptValueObject> fileList = new ArrayList<RptValueObject>();    

        //testUpload(upload , request);
        try{
            LOG.debug("In try catch");

            FileItemIterator iter = upload.getItemIterator(request);
            System.out.println("Entering loop.."+iter.hasNext());

            while (iter.hasNext()) {
                LOG.debug(" reading items...");
                FileItemStream item = iter.next();
                String name = item.getFieldName();
                InputStream stream = item.openStream();

                if (item.isFormField()) {
                    LOG.debug("Form field " + name + " with value "
                        + Streams.asString(stream) + " detected.");
                } else {
                    String fileName = item.getName();
                    if(StringUtils.hasText(fileName))
                        fileName = fileName.substring(fileName.lastIndexOf("\\")+1);
                    fileName = validateAndmodifyFileName(fileName);
                    fileName = fileName.replace('+', '_');
                    fileName = fileName.replace(' ', '_');

                    // find file type and make it uppercase
                    String fileType = fileName.substring(fileName.lastIndexOf('.'));
                    fileName = fileName.substring(0, fileName.lastIndexOf('.'))+fileType.toLowerCase();
                    System.out.println("New name is "+fileName);
                    System.out.println(item.getContentType().length());
                    if(!ValidationCommonUtility.validateFileType(fileName))
                        throw new BaseException(AppConfig.getInstance().get("file.invalid.format"));    

                    // Process the input stream
                    if(tempUploadSession.getSessionId()==null)
                        tempUploadSession.setSessionId(request.getSession().getId());

                    //ERS-62
                    long fileSize = tempUploadSession.uploadFile(item.openStream(), fileName, contentLength);

                    double sizeInKB = FileSizeUtility.convertByteToKB(fileSize);
                    System.out.println("File size is  "+fileSize);
                    System.out.println("File size is KB "+sizeInKB);
                    if(LOG.isDebugEnabled()){
                        LOG.debug("File Size is :::: "+sizeInKB);
                        LOG.debug("Display Value is :::: "+FileSizeUtility.getFileSizeForDisplay(sizeInKB));
                    }

                    fileList.add(new RptValueObject(fileName, FileSizeUtility.getFileSizeForDisplay(sizeInKB),"","",""));


                }
            }
        }catch(IOException ioe){

        }catch(FileUploadException fue){

        } catch (Exception e) {

        }

        ModelAndView mav = new ModelAndView("ajaxresponse/filesUploaded");
        mav.addObject("success", "true");
        mav.addObject("fileList", fileList);
        mav.addObject("totalCount", fileList.size());
        //remove the temp directory created for file upload
        if(rptTempDir.exists()){
            rptTempDir.delete();
        }
        //time to know the upload duration
        Date time2 = new Date();
        long duration = time2.getTime()-time1.getTime();
        System.out.println("Total time took for upload:"+duration+"milliseconds"+" OR "+duration/1000+"seconds");
        return mav;
    }

我无法获取请求中单个文件的大小。如何获取每个文件的大小。

任何帮助将不胜感激。