Json序列化和反序列化的几种方法

Json序列化和反序列化的几种方法

首先先定义一个Person类，用于序列化和反序列化

public class Person
{
string name;

public string Name
{
get { return name; }
set { name = value; }
}
DateTime time;

public DateTime Time
{
get { return time; }
set { time = value; }
}

}

//方法1（使用DataContractJsonSerializey方法）
//必须首先引用命名空间（using System.Runtime.Serialization.Json;来自引用程序集System.ServiceModel.Web）,还要引用命名空间（using System.Runtime.Serialization来自引用程序集System.Runtime.Serialization）
//因为DataContractJsonSerializey继承了XmlObjectSerializer类，所以必须要引用System.Runtime.Serialization命名空间
//序列化(普通数据)
Person person = new Person();
person.Name = "殷海超";
person.Time = Convert.ToDateTime("2012-01-01");
MemoryStream ms = new MemoryStream();//定义内存流
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(Person));//初始化 DataContractJsonSerializer 类的新实例，以便序列化或反序列化指定类型的对象（这里是Person类型）
ser.WriteObject(ms, person);//使用DataContractJsonSerializer 的WriteObject方法将Person写入流

ms.Position = 0;//让流的初始位置位于0
StreamReader sr = new StreamReader(ms);//这是把写入流的序列化好的数据读取出来，供查看
Console.WriteLine(sr.ReadToEnd());

//反序列化(普通数据)
ms.Position = 0;
Person personread = (Person)ser.ReadObject(ms);//使用DataContractJsonSerializer 的ReadObject方法将流ms读取出来反序列化为Person类型的数据
Console.WriteLine("{0}{1}", personread.Name, personread.Time);//输出

Console.ReadLine();

//序列化(List<T>)
List<Person> list = new List<Person>();
list.Add(new Person() { Name = "殷海超", Time = Convert.ToDateTime("2012-01-01") });
list.Add(new Person() { Name = "王琪", Time = Convert.ToDateTime("2012-01-01") });

//或者List<Person> list = new List<Person>()｛
new Person() { Name = "殷海超", Time = Convert.ToDateTime("2012-01-01") }，
new Person() { Name = "王琪", Time = Convert.ToDateTime("2012-01-01") }
｝
MemoryStream ms = new MemoryStream();
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(List<Person>));//（这里是List<Person>类型）
ser.WriteObject(ms, list);

ms.Position = 0;
StreamReader sr = new StreamReader(ms);
Console.WriteLine(sr.ReadToEnd());
//反序列化(List<T>)
ms.Position = 0;
List<Person> personread = (List<Person>)ser.ReadObject(ms);
Console.WriteLine("{0}{1}", personread[0].Name, personread[0].Time);
Console.WriteLine("{0}{1}", personread[1].Name, personread[1].Time);
Console.ReadLine();

//方法2（使用JavaScriptSerializer类）
//使用JavaScriptSerializer类,引用命名空间是using System.Web.Script.Serialization;添加引用程序集System.Web.Extensions（在 System.Web.Extensions.dll 中）

//序列化
Person person = new Person();
person.Name = "殷海超";
person.Time = Convert.ToDateTime("2012-01-01");
JavaScriptSerializer js = new JavaScriptSerializer();
string strJSON = js.Serialize(person);
Console.WriteLine(strJSON);

//反序列化
Person t = js.Deserialize<Person>(strJSON);
Console.WriteLine(t.Name + t.Time);
Console.ReadLine();

//方法3使用Newtonsoft.Json.dll
//下载地址http://json.codeplex.com 要引用using Newtonsoft.Json;using Newtonsoft.Json.Converters;

//序列化
Person person = new Person();
person.Name = "殷海超";
person.Time = Convert.ToDateTime("2012-01-01");
string strJSON = JsonConvert.SerializeObject(person);
Console.WriteLine(strJSON);

//反序列化
Person t = JsonConvert.DeserializeObject<Person>("{Name:\"殷海超\",Time:\"2012-03-07\"}");
Console.WriteLine(t.Name + t.Time);
Console.ReadLine();

原文地址:http://www.cnblogs.com/yinhaichao/archive/2012/04/02/2430281.html