打jar包之后下载项目目录下的指定文件

        OutputStream os = null;
        InputStream in = null;

        String fileName = "score_template.xlsx";
        //获取当前项目resources下templates目录下的指定名称文件
        ClassPathResource resource = new ClassPathResource("\templates\" + fileName);
        try {
            response.setContentType("application/vnd.ms-excel");
            //做中文乱码浏览器兼容处理
            if (request.getHeader("User-Agent").toLowerCase().indexOf("firefox") > -1) {
                response.setHeader("Content-Disposition", "attachment;filename=" + new String(fileName.getBytes("utf-8"), "ISO-8859-1"));
            } else {
                response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName,"utf-8"));
            }

            in = resource.getInputStream();
            os = response.getOutputStream();

            //复制
            IOUtils.copy(in, response.getOutputStream());
            response.getOutputStream().flush();
        } catch (IOException e) {
            System.out.println("下载文件失败，" + e.getMessage());
        } finally {
            try {
              if (in != null) {
                    in.close();
              }
            } catch (IOException e) {
            
            }
        }