.NET JSON对象序列化和反序列化

昨晚和几个哥们打字牌，打了个通宵，早上睡了2个多小时，发现精神还很抖擞(要是写代码有这么给力...哎。碉堡了)。闲来无事，打开VS，coding总结了下.NET序列化：

序列化定义:序列化是将对象状态转换为可保持或传输的格式的过程。与序列化相对的是反序列化，它将流转换为对象。这两个过程结合起来，可以轻松地存储和传输数据。

下面要介绍的是.net提供的序列化对象DataContractJsonSerializer,他主要是用于将对象转化为JSON格式数据以及将JSON反序列化为对象。

直接上代码吧，可以直接在控制台打印出结果：

class Program
{
static void Main(string[] args)
{
Console.WriteLine("============================序列化单个对象为JSON格式======================================================");
var jsonObj = GetUser().ToJsonString();
Console.WriteLine(jsonObj + "\n\r ");

Console.WriteLine("============================序列化集合对象为JSON格式======================================================");
var jsonListObj = GetList().ToJsonString();
Console.WriteLine(jsonListObj + "\n\r ");

Console.WriteLine("============================序列化字符串集合======================================================");
var jsonStrObj = GetString().ToJsonString();
Console.WriteLine(jsonStrObj + "\n\r ");

Console.WriteLine("============================构建一个JSON对象，反序列化为User对象===================================");
//构建JSON对象
string str = "{\"Description\":\"少林袈裟旗舰店店长\",\"Id\":\"1\",\"Name\":\"少林扫地神僧\"}";
var user = str.ToJsonObject<User>();
var entityObj = string.Format("json format str convert to user object:Id={0},Name={1},Description={2}", user.Id, user.Name, user.Description);
Console.WriteLine(entityObj);
Console.ReadKey();
}

public static User GetUser()
{
User user = new User()
{
Id = 1,
Name = "无崖子",
Description = "逍遥派掌门"
};
return user;
}

public static List<User> GetList()
{
List<User> list = new List<User>() {
new User(){ Id=1,Name="丁春秋", Description="星宿派掌门"},
new User(){ Id=2,Name="庄聚贤", Description="无所事事的帅哥"},
new User(){ Id=3,Name="段正淳", Description="风流倜傥大理王爷"}};
return list;
}

public static IList<string> GetString()
{
IList<string> strList = new List<string>();
strList.Add("乔峰");
strList.Add("段誉");
strList.Add("虚竹");
return strList;
}
}

public class User
{
public int Id { get; set; }

public string Name { get; set; }

public string Description { get; set; }
}

public static class StringExtensions
{
/// <summary>
/// 将对象转化为Json字符串
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="instanse">对象本身</param>
/// <returns>JSON字符串</returns>
public static string ToJsonString<T>(this T instanse)
{
try
{
DataContractJsonSerializer js = new DataContractJsonSerializer(typeof(T));
using (MemoryStream ms = new MemoryStream())
{
js.WriteObject(ms, instanse);
ms.Flush();
ms.Seek(0, SeekOrigin.Begin);
StreamReader sr = new StreamReader(ms);
return sr.ReadToEnd();
}
}
catch
{
return String.Empty;
}
}

/// <summary>
/// 将字符串转化为JSON对象，如果转换失败，返回default(T)
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="s">字符串</param>
/// <returns>转换值</returns>
public static T ToJsonObject<T>(this string s)
{
try
{
DataContractJsonSerializer js = new DataContractJsonSerializer(typeof(T));
using (MemoryStream ms = new MemoryStream())
{
StreamWriter sw = new StreamWriter(ms);
sw.Write(s);
sw.Flush();
ms.Seek(0, SeekOrigin.Begin);
return (T)js.ReadObject(ms);
}
}
catch
{
return default(T);
}
}
}

运行结果：