java下载文件

 Ioutil 是hutool包

 @GetMapping(value = "/down/file")
    public void downloadFileStream(HttpServletResponse response) throws UnsupportedEncodingException {
        String name = "公共人员信息模板.xlsx";
        String fileUrl = bootdoConfig.getUploadPath() + name;
        File file = FileUtil.file(fileUrl);
        if (StringUtils.isEmpty(fileUrl) || file == null || !file.exists()) {
            System.out.println("文件不存在");
        }
        ServletOutputStream outputStream = null;
        response.setContentType("application/force-download");// 设置强制下载不打开
        response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(name, "UTF-8"));
        try {
            outputStream = response.getOutputStream();
            outputStream.write(FileUtil.readBytes(file));
        } catch (Exception e) {
            e.printStackTrace();
        }
        IoUtil.close(outputStream);

    }