/// <summary> Rsa签名 </summary> /// <param name="dict"></param> /// <param name="key"></param> /// <param name="charset"></param> /// <returns></returns> public static string RsaSign(this IDictionary <string, string> dict, string key, string charset) { if (dict.ContainsKey("sign")) { dict.Remove("sign"); } var data = dict.ParamsUrl(true, false); return(AlipaySignature.RsaSign(data, key, charset)); }