diskfileupload到servletfileupload过渡的方法

 DiskFileItemFactory factory = new DiskFileItemFactory();       

 factory.setSizeThreshold(0);      

  if(saveDir != null)        	

     factory.setRepository(new File(saveDir));     

     ServletFileUpload upload = new ServletFileUpload(factory);       

     upload.setHeaderEncoding(CJWGlobals.getCharacterEncoding());      

     Log.debug("Setting max size to " + maxSize);       

     maxSize = CJWGlobals.getLocalProperty("blog.photo.upload.maxSize",62914560);      

     upload.setSizeMax(maxSize);