学步园

public static class JsonHelper
    {
        /// <summary>
        /// JSON序列化
        /// </summary>
        public static string JsonSerializer<T>(T t)
        {
            //so
            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
            MemoryStream ms = new MemoryStream();
            ser.WriteObject(ms, t);
            string jsonString = Encoding.UTF8.GetString(ms.ToArray());
            ms.Close();
            //替换Json的Date字符串
            const string p = @"\\/Date\((\d+)\+\d+\)\\/";
            MatchEvaluator matchEvaluator = ConvertJsonDateToDateString;
            Regex reg = new Regex(p);
            jsonString = reg.Replace(jsonString, matchEvaluator);
            return jsonString;
        }
        /// <summary>
        /// 从一个对象信息生成Json串
        /// </summary>
        /// <param name="obj">转换对象</param>
        /// <typeparam name="T">对象类型</typeparam>
        /// <returns></returns>
        public static string ToJson<T>(this T obj)
        {
            var fullName = typeof (T).FullName;
            if (fullName != null && fullName.Contains("<>f__AnonymousType"))
            {
                //匿名类型
                var serializer = new System.Web.Script.Serialization.JavaScriptSerializer();
                return serializer.Serialize(obj);
            }
            else
            {
                var serializer = new DataContractJsonSerializer(typeof(T));
                string json;
                using (MemoryStream stream = new MemoryStream())
                {
                    serializer.WriteObject(stream, obj);
                    json = Encoding.UTF8.GetString(stream.ToArray());
                    stream.Close();
                }
                return json;
            }
        }

        /// <summary>
        /// JSON反序列化
        /// </summary>
        public static T JsonDeserialize<T>(string jsonString)
        {
            //将"yyyy-MM-dd HH:mm:ss"格式的字符串转为"\/Date(1294499956278+0800)\/"格式
            const string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}";
            MatchEvaluator matchEvaluator = ConvertDateStringToJsonDate;
            Regex reg = new Regex(p);
            jsonString = reg.Replace(jsonString, matchEvaluator);
            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
            T obj = (T)ser.ReadObject(ms);
            return obj;
        }
        /// <summary>
        /// 将Json序列化的时间由/Date(1294499956278+0800)转为字符串
        /// </summary>
        private static string ConvertJsonDateToDateString(Match m)
        {
            DateTime dt = new DateTime(1970, 1, 1);
            dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));
            dt = dt.ToLocalTime();
            string result = dt.ToString("yyyy-MM-dd HH:mm:ss");
            return result;
        }

        /// <summary>
        /// 将时间字符串转为Json时间
        /// </summary>
        private static string ConvertDateStringToJsonDate(Match m)
        {
            DateTime dt = DateTime.Parse(m.Groups[0].Value);
            dt = dt.ToUniversalTime();
            TimeSpan ts = dt - DateTime.Parse("1970-01-01");
            string result = string.Format("\\/Date({0}+0800)\\/", ts.TotalMilliseconds);
            return result;
        }
    }

原文地址http://blog.csdn.net/allsharps/article/details/7357446