HmacSHA256签名加Base64编码加URL编码

/**
 *先使用HmacSHA256签名，再使用Base64编码,最后进行URL 编码
 *signatureReqStr : 待加密data
 * secretKey : 密钥
 */
public static String getSignature(String signatureReqStr,String secretKey){
 ???Mac sha256_HMAC ;
 ???String result = "";
 ???try {
 ???????sha256_HMAC = Mac.getInstance("HmacSHA256");
 ???????SecretKeySpec secret_key = new SecretKeySpec(secretKey.getBytes(), "HmacSHA256");
 ???????sha256_HMAC.init(secret_key);
 ???????result = Base64.encodeBase64String(sha256_HMAC.doFinal(signatureReqStr.getBytes()));
 ???????result = URLEncoder.encode(result);
 ???} catch (InvalidKeyException e) {
 ???????e.printStackTrace();
 ???} catch (NoSuchAlgorithmException e) {
 ???????e.printStackTrace();
 ???}
 ???return result;
}