/// <summary>
 /// User Cookie 加密
 /// </summary>
 /// <param name="cookieModel">用户Cookie实体</param>
 /// <param name="key">DES加密key</param>
 /// <returns></returns>
 public static string EncryptUserCookie(UserCookieModel cookieModel, string key)
 {
     return(DesUtil.Encrypt3DES_2(string.Concat(cookieModel._id, "\f", cookieModel._uname, "\f", cookieModel._ip, "\f", cookieModel._timestamp), key));
 }