[java]下載excel模板

@ApiOperation("(公用下載excel模板)")
@ApiImplicitParams({@ApiImplicitParam(name = "excelFileName", value = "文件名稱", dataType = "String",required = true)})
@GetMapping("/downLoadExcelFiles")
@ResponseBody
public String downLoadExcelFiles(@RequestParam("excelFileName")String excelFileName,HttpServletResponse response){
   if (excelFileName != null) {
      ServletOutputStream out = null;
      try {
         // 以流的形式下載文件   這種方法，打成jar包之后，下載的文件，不會被損壞
         InputStream fis = FileUtil.getResourcesFileInputStream("static/excelfiles/"+excelFileName+".xlsx");
         if(fis!=null) {
            //使用workbook方式進行下載
                   XSSFWorkbook workbook = new XSSFWorkbook(fis);
                   //處理文件名中文
                   response.setContentType("application/binary;charset=ISO8859-1");
                   String fileName = java.net.URLEncoder.encode(excelFileName, "UTF-8");
                   response.setHeader("Content-disposition", "attachment; filename=" + fileName + ".xlsx");
                   out = response.getOutputStream();
                   workbook.write(out);
         }else{
                   return "該文件不存在";
               }
      } catch (IOException e) {
         e.printStackTrace();
      } finally {
         try {
            out.flush();
            out.close();
         } catch (IOException e) {
            e.printStackTrace();
         }
      }
   }
   return null;
}

模板存放位置：