public static void main(String[] args) throws AuthException, EncoderException {
    Config.ACCESS_KEY = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
    Config.SECRET_KEY = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

    Mac mac = new Mac(Config.ACCESS_KEY, Config.SECRET_KEY);
    String baseUrl = URLUtils.makeBaseUrl("cornertech.qiniudn.com", "linus.jpeg");
    GetPolicy getPolicy = new GetPolicy();
    String downloadUrl = getPolicy.makeRequest(baseUrl, mac);
    System.out.println(downloadUrl);
    // 获取下载的url后，用浏览器打开，获取不到资源
    // 请问这段代码有什么错误吗
    // 空间是私有的
}