C# 使用JSON对数据序列化和反序列化.

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;
}
}