<"user_".$userId; //hash键名
     $key=$goodsId."_".$goodsName;//键名
     //加入
     return $this->redis->hIncrBy($hashKey,$key,1);
   }
  /**
   * 单删
   *
   * @author YING
   * @param userId goodsId
   * @return
   */
  public function cartDelOne($userId,$goodsId)
  {
    $hashKey="user_".$userId; //hash键名
    $key=$goodsId;//键名
    //删除
    return $this->redis->hDel($hashKey,$key);
  }
  /**
   * 清空购物车
   *
   * @author YING
   * @param userId
   * @return void
   */
  public function cartDelAll($userId)
  {
    $hashKey="user_".$userId; //hash键名
    //删除
    return $this->redis->del($hashKey);
  }
  /**
   * 购物车列表
   *
   * @author YING
   * @param userId
   * @return void
   */
  public function cartList($userId)
  {
    $hashKey="user_".$userId; //hash键名
    //查询数据
    return $this->redis->hGetAll($hashKey);
  }
}
//实例化类
$obj=CartSingleton::getInstance();