@PostMapping(value = "/template")    @ApiOperation("xxxxxx")    public void xxxxxxxxDownload(            HttpServletResponse response    ) throws Exception {        try {            Resource res = new ClassPathResource(xxxxxxxxx);            try (BufferedInputStream fis = new BufferedInputStream(res.getInputStream())) {                int offset = 0;                int bytesRead = 0;                byte[] data = new byte[fis.available()];                while ((bytesRead = fis.read(data, offset, data.length - offset))                        != -1) {                    offset += bytesRead;                    if (offset >= data.length) {                        break;                    }                }                //String str = new String(data, 0, offset, "UTF-8");                response.setHeader("Content-Disposition", "attachment; filename=" + res.getFilename());                response.setHeader("Access-Control-Allow-Origin", "*");                //response.setContentType("application/vnd.ms-read; charset=utf-8");                response.setContentType("application/octet-stream");                try (OutputStream outStream = new BufferedOutputStream(response.getOutputStream())) {                    outStream.write(data);                    outStream.flush();                }            }        } catch (Exception e) {            logger.error("xxxxxx" + e.getMessage(), e);            throw e;        }    }