@RequestMapping(value = "/savD", method = RequestMethod.POST)
  public ResponseEntity<Void> saveFile(@RequestParam("file") MultipartFile file) {
    if (!file.isEmpty()) {
      try {
        byte[] bytes = file.getBytes();
        Document document = new Document();
        document.setName(file.getOriginalFilename());
        document.setContent(bytes);
        documentService.save(document);
      } catch (Exception e) {
      }
    } else {
    }

    HttpHeaders headers = new HttpHeaders();
    return new ResponseEntity<Void>(headers, HttpStatus.CREATED);
  }
  @RequestMapping(value = "/upload", method = RequestMethod.POST)
  public ResponseEntity uploadFile(MultipartHttpServletRequest request) {

    try {
      Iterator<String> itr = request.getFileNames();

      while (itr.hasNext()) {
        String uploadedFile = itr.next();
        MultipartFile file = request.getFile(uploadedFile);
        String mimeType = file.getContentType();
        String filename = file.getOriginalFilename();
        byte[] bytes = file.getBytes();
        Document document = new Document();
        document.setContent(bytes);
        document.setName(filename);
        document.setMimeType(mimeType);
        documentService.save(document);
      }
    } catch (Exception e) {
      return new ResponseEntity<>("{}", HttpStatus.INTERNAL_SERVER_ERROR);
    }

    return new ResponseEntity<>("{}", HttpStatus.OK);
  }