多个文件打包一起导出

@RequestMapping(value = "/excel", method = RequestMethod.GET)
public void exportExcel(SettlementBillItemAllDTO dto, HttpServletRequest request, HttpServletResponse response){
   settlementFinanceService.addOperationLog(null, null, "listOldExport", "导出历史演变表");
   // 设置sheet名称和文件名称
   String sheetName = "历史演变表";
   String fileName = sheetName + ".zip";
   FileDownloadUtils.createFile(tempExcelFilePath);
   List<File> files = new ArrayList<File>();  //声明一个集合，用来存放多个Excel文件路径及名称
   try {
      Integer size = 1;
      Integer page = 1;
      while (size > 0){
         PageHelper.startPage(page, 100000);
         PageInfo<SettlementBillItemAllDTO> dtoList =settlementFinancePriceService.query(dto,null,null);
         String path = tempExcelFilePath + sheetName + page + ".xlsx";
         new ExportExcel("", SettlementBillItemAllDTO.class, sheetName).setDataList(dtoList.getList()).generateExcelToPath(path);
         //excel添加到files中
         files.add(new File(path));
         if(page >= dtoList.getPages()){
            size = 0;
         }else{
            size = dtoList.getSize();
         }

         page++;
      }
      String zipPath = tempExcelFilePath + fileName;
      //下载zip
      FileDownloadUtils.downloadZip(request, response, fileName, files, zipPath);
      //删除tempDir文件夹和其中的excel和zip文件
      boolean b = FileDownloadUtils.deleteDir(new File(tempExcelFilePath));
      if (!b) {
         throw new RuntimeException("tempDir文件夹及其中的临时Excel和zip文件删除失败");
      }

   } catch (Exception e) {
      log.error(e.getMessage(), e);
   }finally {

   }
}