Json序列化与反序列化类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Runtime.Serialization.Json;
using System.IO;


    public class JsonSerializer
    {
   
        /// <summary>
        /// json 序列化
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="t"></param>
        /// <returns></returns>
        public static string Serializer<T>(T t)
        {

            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

            string p = @"\\/Date\((\d+)\+\d+\)\\/";

            MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);

            Regex reg = new Regex(p);

            jsonString = reg.Replace(jsonString, matchEvaluator);

            return jsonString;

        }



 
          /// <summary>
          /// json反序列化
          /// </summary>
          /// <typeparam name="T"></typeparam>
          /// <param name="jsonString"></param>
          /// <returns></returns>
        public static T Deserialize<T>(string jsonString)
        {

            //将"yyyy-MM-dd HH:mm:ss"格式的字符串转为"\/Date(1294499956278+0800)\/"格式

            string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}";

            MatchEvaluator matchEvaluator = new 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)
        {

            string result = string.Empty;

            DateTime dt = new DateTime(1970, 1, 1);

            dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));

            dt = dt.ToLocalTime();

            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)
        {

            string result = string.Empty;

            DateTime dt = DateTime.Parse(m.Groups[0].Value);

            dt = dt.ToUniversalTime();

            TimeSpan ts = dt - DateTime.Parse("1970-01-01");

            result = string.Format("\\/Date({0}+0800)\\/", ts.TotalMilliseconds);

            return result;

        }
    }