public static class JsonNewtonsoft

    {

        /// <summary>

        /// 把对象转换为JSON字符串

        /// </summary>

        /// <param name="o">对象</param>

        /// <returns>JSON字符串</returns>

        public static string ToJSON(this object o)

        {

            if (o == null)

            {

                return null;

            }

            return JsonConvert.SerializeObject(o);

        }

        /// <summary>

        /// 把Json文本转为实体

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="input"></param>

        /// <returns></returns>

        public static T FromJSON<T>(this string input)

        {

            try

            {

                return JsonConvert.DeserializeObject<T>(input);

            }

            catch (Exception ex)

            {

                return default(T);

            }

        }

    }