@Override
   public void download(Long id, HttpServletResponse response) throws IOException {
       
       // 数据库里查出来的数据
       Optional<OutgoingLog> optional = outgoingLogRepository.findByIdAndDeletedFalse(id);
       if (!optional.isPresent()) {
           throw new AppException(AppErrorEnums.DATA_IS_NOT_EXIST);
       }

       ByteArrayOutputStream bos = new ByteArrayOutputStream();
       ZipOutputStream zip = new ZipOutputStream(bos);

       List<FileStorage> files = optional.get().getFileStorage();

       for (FileStorage fileStorage : files) {
           byte[] bytes = fileStorageService.getFileObject(fileStorage);
		
           // 压进压缩包并设置文件名
           zip.putNextEntry(new ZipEntry(fileStorage.getFileName()));
           IOUtils.write(bytes, zip);

       }

       zip.close();

       byte[] data = bos.toByteArray();
       String fileName = DateUtils.dateFormat(System.currentTimeMillis()) + ".zip";
       response.reset();
       response.setHeader("content-disposition", "attachment;filename*=UTF-8''"
               + URLEncoder.encode(fileName, "UTF-8"));
       IOUtils.write(data, response.getOutputStream());

   }