1: using System;
2: using System.Collections.Generic;
3: using System.Linq;
4: using System.Web;
5: using System.Runtime.Serialization.Json;
6: using System.IO;
7: using System.Text;
8: using System.Text.RegularExpressions;
9:
10: /// <summary>
11: /// JSON序列化和反序列化辅助类
12: /// </summary>
13: public class JsonHelper
14: {
15: /// <summary>
16: /// JSON序列化
17: /// </summary>
18: public static string JsonSerializer<T>(T t)
19: {
20: DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
21: MemoryStream ms = new MemoryStream();
22: ser.WriteObject(ms, t);
23: string jsonString = Encoding.UTF8.GetString(ms.ToArray());
24: ms.Close();
25: //替换Json的Date字符串
26: string p = @"\/Date((d+)+d+)\/";
27: MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);
28: Regex reg = new Regex(p);
29: jsonString = reg.Replace(jsonString, matchEvaluator);
30: return jsonString;
31: }
32:
33: /// <summary>
34: /// JSON反序列化
35: /// </summary>
36: public static T JsonDeserialize<T>(string jsonString)
37: {
38: //将"yyyy-MM-dd HH:mm:ss"格式的字符串转为"/Date(1294499956278+0800)/"格式
39: string p = @"d{4}-d{2}-d{2}sd{2}:d{2}:d{2}";
40: MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertDateStringToJsonDate);
41: Regex reg = new Regex(p);
42: jsonString = reg.Replace(jsonString, matchEvaluator);
43: DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
44: MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
45: T obj = (T)ser.ReadObject(ms);
46: return obj;
47: }
48:
49: /// <summary>
50: /// 将Json序列化的时间由/Date(1294499956278+0800)转为字符串
51: /// </summary>
52: private static string ConvertJsonDateToDateString(Match m)
53: {
54: string result = string.Empty;
55: DateTime dt = new DateTime(1970,1,1);
56: dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));
57: dt = dt.ToLocalTime();
58: result = dt.ToString("yyyy-MM-dd HH:mm:ss");
59: return result;
60: }
61:
62: /// <summary>
63: /// 将时间字符串转为Json时间
64: /// </summary>
65: private static string ConvertDateStringToJsonDate(Match m)
66: {
67: string result = string.Empty;
68: DateTime dt = DateTime.Parse(m.Groups[0].Value);
69: dt = dt.ToUniversalTime();
70: TimeSpan ts = dt - DateTime.Parse("1970-01-01");
71: result = string.Format("\/Date({0}+0800)\/",ts.TotalMilliseconds);
72: return result;
73: }
74: }