JavaScriptSerializer 序列化json 时间格式

利用JavaScriptSerializer 序列化json 时间格式，得到的DateTime值值显示为“/Date(700000+0500)/”形式的JSON字符串，显然要进行转换

1.利用字符串直接替换

Model m = new Model { Id = 1, Dt = DateTime.Now };
JavaScriptSerializer js = new JavaScriptSerializer();
string str = js.Serialize(m);
str = Regex.Replace(str, @"\\/Date\((\d+)\)\\/", match =>
{
DateTime dt = new DateTime(1970, 1, 1);
dt = dt.AddMilliseconds(long.Parse(match.Groups[1].Value));
dt = dt.ToLocalTime();
return dt.ToString("yyyy-MM-dd HH:mm:ss");
});
Response.Write(str);
//{"Id":1,"Dt":"2011-08-17 17:38:47"}

2.JsonHelper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Runtime.Serialization.Json;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
/// <summary>
/// JSON序列化和反序列化辅助类
/// </summary>
public class JsonHelper
{
/// <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+/)///"; /*////Date/((([/+/-]/d+)|(/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;
}
}

List<T>序列化:

1: List<Person> list = new List<Person>()

2: {

3:     new Person(){ Name="张三", Age=28},

4:     new Person(){ Name="李四", Age=25}

5: };

6:

7: string jsonString = JsonHelper.JsonSerializer<List<Person>>(list);

序列化结果：

"[{/"Age/":28,/"Name/":/"张三/"},{/"Age/":25,/"Name/":/"李四/"}]"

字典不能直接用于JSON，Dictionary字典转化为JSON并不是跟原来的字典格式一致，而是形式以Dictionary的Key作为名称”Key“的值，以Dictionary的Value作为名称为”Value“的值 。如：

1: Dictionary<string, string> dic = new Dictionary<string, string>();

2: dic.Add("Name", "张三");

3: dic.Add("Age", "28");

4:

5: string jsonString = JsonHelper.JsonSerializer < Dictionary<string, string>>(dic);

序列化结果：

1: "[{/"Key/":/"Name/",/"Value/":/"张三/"},{/"Key/":/"Age/",/"Value/":/"28/"}]"