.net——序列化与反序列化中对日期时间的处理

            承接上篇，现在我在类中加入一个日期时间类型的字段：

public class Student
{
public string StudentId { get; set; }
public string Name { get; set; }
public int age { get; set; }
public string Address { get; set; }
public DateTime Birthday { get; set; }

}

       如果不对birthday这个类型处理的话，序列化之后就会出现这个问题：

{"Address":"北京朝阳区","Birthday":"\/Date(1434943392228+0800)\/","Name":"水田如雅","StudentId":"110","age":20}

       现在我们在原来的方法上面进行一个改进：

           public static class JsonConvert
{
/// <summary>
/// Converts the obj to json.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="t">The t.</param>
/// <returns>System.String.</returns>
/// <remarks>Editor：v-liuhch CreateTime：2015/6/21 21:40:55</remarks>
public static string ConvertObjToJson<T>(T t)
{
DataContractJsonSerializer ser = new DataContractJsonSerializer(t.GetType());

try
{
using (MemoryStream ms=new MemoryStream())
{
ser.WriteObject(ms,t);
string strJson=Encoding.UTF8.GetString(ms.ToArray());
//替换Json的date字符串
string p = @"\\/Date\((\d+)\+\d+\)\\/";
MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDataToDateString);

Regex reg = new Regex(p);
strJson = reg.Replace(strJson, matchEvaluator);
return strJson;
}

}
catch (IOException)
{
//自己处理异常吧
return null;
}

}

/// <summary>
/// Jsons the deserialize.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="strJson">The STR json.</param>
/// <returns>``0.</returns>
/// <remarks>Editor：v-liuhch CreateTime：2015/6/21 21:46:37</remarks>
public static T JsonDeserialize<T>(string strJson)
where T:class //约束T为class,也可以放宽类型，这里只是个例子，写着玩儿的，欧巴们，此处可改
{

DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));

try
{
//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);
strJson = reg.Replace(strJson, matchEvaluator);

using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(strJson)))
{
T obj = ser.ReadObject(ms) as T;
return obj;
}
}
catch (IOException e)
{
//自己处理异常吧
return null;
}

}

/// <summary>
/// Converts the json data to date string.
/// </summary>
/// <param name="m">The m.</param>
/// <returns>System.String.</returns>
/// <remarks>Editor：v-liuhch CreateTime：2015/6/22 11:39:18</remarks>
private static string ConvertJsonDataToDateString(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();//转换为本地时间
result = dt.ToString("yyyy-MM-dd HH:mm:ss");
return result;

}
/// <summary>
/// Converts the date string to json date.
/// </summary>
/// <param name="m">The m.</param>
/// <returns>System.String.</returns>
/// <remarks>Editor：v-liuhch CreateTime：2015/6/22 11:39:15</remarks>
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;

}

}

            当然，在序列化的时候，我们可以不对日期时间做单独处理，拿到前台JS之后，再对数据进行一个整合过滤，这样，就不会固定死日期时间的返回格式，感觉这样比在后台处理好。