         DiskFileItemFactory factory = new DiskFileItemFactory();          ServletFileUpload upload = new ServletFileUpload(factory);          String uuidValue = "";         FileItem itemFile = null;          try {             // parses the request's content to extract file data             List formItems = upload.parseRequest(request);             Iterator iter = formItems.iterator();              // iterates over form's fields to get UUID Value             while (iter.hasNext()) {                 FileItem item = (FileItem) iter.next();                 if (item.isFormField()) {                  }                 // processes only fields that are not form fields                 if (!item.isFormField()) {                     itemFile = item;                 }             }         }             catch (Exception e) {                 // TODO: handle exception             }          