Java原样导出excel模板

@PostMapping(value = "exportBlankTemplate")
    public void exportBlankTemplate(HttpServletResponse response) {
        APIResult<String> result = new APIResult<>();
        org.springframework.core.io.Resource resource = new ClassPathResource("template/" + EXCEL_BLANK_TEMPLATE);
        try {
            InputStream in = resource.getInputStream();
            OutputStream out = response.getOutputStream();
            response.reset();
            response.setContentType("application/octet-stream");
            response.setCharacterEncoding("utf-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + EXCEL_BLANK_TEMPLATE);
            // 循环取出流中的数据
            byte[] b = new byte[200];
            int len;
            while ((len = in.read(b)) > 0) {
                out.write(b, 0, len);
            }
            out.flush();
            out.close();
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

private static final String EXCEL_BLANK_TEMPLATE = "KBJBTZS.xlsx";