Json中对日期的处理

前言：Json对日期的处理很特别，我们不能简单的转换而得到我们想要的结果，需要进行特殊处理

一、JSon序列化和反序列化对日期的处理

JsonHelper类：

using System.IO;
using System.Linq;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;

namespace MVCEFDbFirstTutotrials.Common
{
    public class JsonHelper
    {
        public static void Test()
        {
            Product product = new Product()
            {
                Name = "",
                Description = "",
                Price = ,
                Color = "color",
                PublishOn = DateTime.Now
            };
            string jsonString = JsonSerializer<Product>(product);
            Product product1 = JsonDeserialize<Product>(jsonString);
        }

        /// <summary>
        /// JSON序列化
        /// </summary>
        public static string JsonSerializer<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>
        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
            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yyyy-MM-dd HH:mm:ss字符串
        /// </summary>
        private static string ConvertJsonDateToDateString(Match m)
        {
            string result = string.Empty;
            DateTime dt = new DateTime(, , );
            dt = dt.AddMilliseconds(long.Parse(m.Groups[].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[].Value);
            dt = dt.ToUniversalTime();
            TimeSpan ts = dt - DateTime.Parse("1970-01-01");
            result = string.Format("\\/Date({0}+0800)\\/", ts.TotalMilliseconds);
            return result;
        }
    }  

}

二、前台对返回的\/Date(1294499956278+0800) \/日期格式进行处理：

function ChangeDateFormat(jsondate) {
        jsondate = jsondate.replace("/Date(", "").replace(")/", "");
        if (jsondate.indexOf("+") > ) {
            jsondate = jsondate.substring(, jsondate.indexOf("+"));
        }
        else if (jsondate.indexOf("-") > ) {
            jsondate = jsondate.substring(, jsondate.indexOf("-"));
       }        

       var date = new Date(parseInt(jsondate, ));
       var month = date.getMonth() +  <  ? "" + (date.getMonth() + ) : date.getMonth() + ;
       var currentDate = date.getDate() <  ? "" + date.getDate() : date.getDate();
       return date.getFullYear() + "-" + month + "-" + currentDate;
   }

简单Demo： ChangeDateFormat("\/Date(1294499956278+0800)\/");

结果： 2011-1-8