springboot 读取resources下的文件然后下载

记录下代码

/**
     * 下载模板
     *
     * @param response
     * @param request
     */
    @RequestMapping(value = "downloadTemp")
    public void downloadTemp(HttpServletResponse response, HttpServletRequest request) {
        InputStream inputStream = null;
        ServletOutputStream servletOutputStream = null;
        try {
            String filename = "导入模板.xls";
            String path = "excel/drmb.xls";
            Resource resource = resourceLoader.getResource("classpath:"+path);response.setContentType("application/vnd.ms-excel");
            response.addHeader("Cache-Control", "no-cache, no-store, must-revalidate");
            response.addHeader("charset", "utf-8");
            response.addHeader("Pragma", "no-cache");
            String encodeName = URLEncoder.encode(filename, StandardCharsets.UTF_8.toString());
            response.setHeader("Content-Disposition", "attachment; filename=\"" + encodeName + "\"; filename*=utf-8''" + encodeName);

            inputStream = resource.getInputStream();
            servletOutputStream = response.getOutputStream();
            IOUtils.copy(inputStream, servletOutputStream);
            response.flushBuffer();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (servletOutputStream != null) {
                    servletOutputStream.close();
                }
                if (inputStream != null) {
                    inputStream.close();
                }
                // 召唤jvm的垃圾回收器
                System.gc();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }