java 导入授权文件并且存入服务器

public void importFile(@RequestParam("file") MultipartFile file) throws Exception {

    if (file.isEmpty()) {
        throw new DoValidException("传入文件不可为空");
    }
    String name = file.getOriginalFilename();
    InputStream inputStream = file.getInputStream();
    OutputStream outputStream = new FileOutputStream(System.getProperty("user.dir") + "/data/" + name);
    IOUtils.copy(inputStream, outputStream);
    outputStream.flush();
    inputStream.close();
    outputStream.close();
}