在URL中包含签名

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public static void getPublicURL(String keyName, String bucketName) {
    try {
        /*
        生成公共下载URL
        */
        String public_url = UfileClient.object(Constants.OBJECT_AUTHORIZER, config)
        .getDownloadUrlFromPublicBucket(keyName, bucketName)
        .createUrl();
        JLog.D(TAG, String.format("[PublicUrl] = %s", public_url));
    } catch (UfileParamException e) {
        e.printStackTrace();
    } catch (UfileAuthorizationException e) {
        e.printStackTrace();
    } catch (UfileSignatureException e) {
        e.printStackTrace();
    } catch (UfileClientException e) {
        e.printStackTrace();
    }
}

public static void getPrivateURL(String keyName, String bucketName, int expiresDuration) {
    try {
        /*
        生成私有下载URL
        */
        //  expiresDuration 私有下载路径的有效时间，即：生成的下载URL会在 创建时刻的时间戳 + expiresDuration秒后的时刻过期
        String private_url = UfileClient.object(Constants.OBJECT_AUTHORIZER, config)
        .getDownloadUrlFromPrivateBucket(keyName, bucketName, expiresDuration)
        .createUrl();
        JLog.D(TAG, String.format("[PrivateUrl] = %s", private_url));
    } catch (UfileParamException e) {
        e.printStackTrace();
    } catch (UfileAuthorizationException e) {
        e.printStackTrace();
    } catch (UfileSignatureException e) {
          e.printStackTrace();
    } catch (UfileClientException e) {
        e.printStackTrace();
    }
}