public class TemplateUtil {
   public  void downloadTemplate(HttpServletResponse response) throws Exception{
           InputStream inputStream  =null ;         OutputStream outputStream = null;         inputStream = this.getClass().getResourceAsStream("/files/template.xlsx"); if (inputStream == null){
   throw new Exception("未找到模板文件");         }         response.setContentType("application/vnd.ms-excel;charset=utf-8");         response.setCharacterEncoding("UTF-8");         response.setHeader("content-disposition","attachment;filename=" + "模板.xlsx"); try{
               outputStream = response.getOutputStream(); byte[] readBytes = new byte[1024]; int read = 0; while ((read = inputStream.read(readBytes)) != -1){
                   outputStream.write(readBytes,0,read);                 outputStream.flush();             }         } catch (Exception e){
   // do something          } finally {
   if (inputStream != null){
                   inputStream.close();             } if (outputStream != null){
                   outputStream.close();             }         }     } }