JavaScriptSerializer 序列化json 时间格式-收集

Model m =

new

Model { Id = 1, Dt = DateTime.Now };

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2011-01-26 11:13
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jsonstringregex正则表达式datejavascript

JSON格式不直接支持日期和时间。DateTime值值显示为“/Date(700000+0500)/”形式的JSON字符串，其中第一个数字（在提供的示例中为 700000）是 GMT 时区中自 1970 年 1 月 1 日午夜以来按正常时间（非夏令时）经过的毫秒数。该数字可以是负数，以表示之前的时间。示例中包括“+0500”的部分可选，它指示该时间属于Local类型，即它在反序列化时应转换为本地时区。如果没有该部分，则会将时间反序列化为Utc。

修改Person类，添加LastLoginTime：

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public class Person
{
public string Name { get; set; }
public int Age { get; set; }
public DateTime LastLoginTime { get; set; }
}

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Person p = new Person();
p.Name = "张三";
p.Age = 28;
p.LastLoginTime = DateTime.Now;
string jsonString = JsonHelper.JsonSerializer<Person>(p);

Person p = new Person();
p.Name = "张三";
p.Age = 28;
p.LastLoginTime = DateTime.Now;
string jsonString = JsonHelper.JsonSerializer<Person>(p);

序列化结果：

{"Age":28,"LastLoginTime":"//Date(1294499956278+0800)//","Name":"张三"}

1 、在后台使用正则表达式对其替换处理。修改JsonHelper：

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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;
}
}

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Person p = new Person();
p.Name = "张三";
p.Age = 28;
p.LastLoginTime = DateTime.Now;
string jsonString = JsonHelper.JsonSerializer<Person>(p);

Person p = new Person();
p.Name = "张三";
p.Age = 28;
p.LastLoginTime = DateTime.Now;
string jsonString = JsonHelper.JsonSerializer<Person>(p);

运行结果：

{"Age":28,"LastLoginTime":"2011-01-09 01:00:56","Name":"张三"}

反序列化Demo：

string json = "{/"Age/":28,/"LastLoginTime/":/"2011-01-09 00:30:00/",/"Name/":/"张三/"}";

p=JsonHelper.JsonDeserialize<Person>(json);

运行结果：



在后台替换字符串适用范围比较窄，如果考虑到全球化的有多种语言还会更麻烦。

2、利用JavaScript处理

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function ChangeDateFormat(jsondate) {
jsondate = jsondate.replace("/Date(", "").replace(")/", "");
if (jsondate.indexOf("+") > 0) {
jsondate = jsondate.substring(0, jsondate.indexOf("+"));
}
else if (jsondate.indexOf("-") > 0) {
jsondate = jsondate.substring(0, jsondate.indexOf("-"));
}

var date = new Date(parseInt(jsondate, 10));
var month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
var currentDate = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
return date.getFullYear() + "-" + month + "-" + currentDate;
}

function ChangeDateFormat(jsondate) {
jsondate = jsondate.replace("/Date(", "").replace(")/", "");
if (jsondate.indexOf("+") > 0) {
jsondate = jsondate.substring(0, jsondate.indexOf("+"));
}
else if (jsondate.indexOf("-") > 0) {
jsondate = jsondate.substring(0, jsondate.indexOf("-"));
}

var date = new Date(parseInt(jsondate, 10));
var month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
var currentDate = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
return date.getFullYear() + "-" + month + "-" + currentDate;
}

简单Demo ：

ChangeDateFormat("//Date(1294499956278+0800)//");

结果：

2011-1-8