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\((\d+)\+\d+\)\\/";
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;
}
}
序列化Demo:
复制代码 代码如下:
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
复制代码 代码如下:
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:
四、JSON序列化和反序列化集合、字典、数组的处理
在JSON数据中,所有的集合、字典和数组都表示为数组。
List<T>序列化:
复制代码 代码如下:
List<Person> list = new List<Person>()
{
new Person(){, Age=28},
new Person(){, Age=25}
};
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:
Dictionary<string, string> dic = new Dictionary<string, string>();
dic.Add("Name", "张三");
dic.Add("Age", "28");
string jsonString = JsonHelper.JsonSerializer < Dictionary<string, string>>(dic);
序列化结果:
"[{\"Key\":\"Name\",\"Value\":\"张三\"},{\"Key\":\"Age\",\"Value\":\"28\"}]"
您可能感兴趣的文章: