java下载

    @GetMapping("/downLoadTemplate/v1/{type}")
    @ApiOperation(value = "导入模板下载", httpMethod = "导入模板下载")
    public void downImportTemplate(@ApiParam(name = "type") @PathVariable("type") Integer type,HttpServletResponse response) {

        try {
//            String fileName = MemberTemplateEnum.getByValue(type).getValue();
//
//            ClassPathResource classPathResource = new ClassPathResource("import-template/" + fileName);
//            InputStream inputStream = classPathResource.getInputStream();
//            byte[] data = FileCopyUtils.copyToByteArray(inputStream);
//            inputStream.close();
//            response.setContentType("application/octet-sream;charset=UTF-8");
//            response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
//            response.addHeader("Content-Length", "" + data.length);
//
//            OutputStream outputStream = response.getOutputStream();
//            outputStream.write(data);
//            outputStream.flush();
//            outputStream.close();

            String fileName = MemberTemplateEnum.getByValue(type).getValue();
            String path = "I:/haizeiwang.jpg";
            // path是指欲下载的文件的路径。
            File file = new File(path);
            // 取得文件名。
            String filename = file.getName();
            // 取得文件的后缀名。
            String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();

            // 以流的形式下载文件。
            InputStream inputStream = new BufferedInputStream(new FileInputStream(path));

            byte[] data = new byte[inputStream.available()];
            inputStream.read(data);
//            byte[] data = FileCopyUtils.copyToByteArray(inputStream);
            inputStream.close();
            response.reset();
            response.setContentType("application/octet-sream;charset=UTF-8");
            response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
            response.addHeader("Content-Length", "" + data.length);

//            OutputStream outputStream = response.getOutputStream();
            OutputStream outputStream = new BufferedOutputStream(response.getOutputStream());
            outputStream.write(data);
            outputStream.flush();
            outputStream.close();

        } catch (Exception e) {
            log.error("下载导入模板异常", e);
        }

    }