.net序列化 - Newtonsoft（Json.Net）简单应用

　　Newtonsoft.Json，一款.NET中开源的Json序列化和反序列化类库。

　　Json.Net是一个读写Json效率比较高的.Net框架.Json.Net 使得在.Net环境下使用Json更加简单。通过Linq To JSON可以快速的读写Json，通过JsonSerializer可以序列化你的.Net对象。让你轻松实现.Net中所有类型(对象,基本数据类型等)和Json的转换.

简单应用

//序列化
stirng json = JsonConvert.SerializeObject（ojbect)；

//反序列化
T object = DeserializeObject<T>(string josn);　　

简单封装

/// <summary>
/// Json帮助类
/// </summary>
public class JsonHelper
{
/// <summary>
/// 将对象序列化为JSON格式
/// </summary>
/// <param name="o">对象</param>
/// <returns>json字符串</returns>
public static string SerializeObject(object o)
{
string json = JsonConvert.SerializeObject(o);
return json;
}

/// <summary>
/// 解析JSON字符串生成对象实体
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="json">json字符串(eg.{"ID":"112","Name":"石子儿"})</param>
/// <returns>对象实体</returns>
public static T DeserializeJsonToObject<T>(string json) where T : class
{
JsonSerializer serializer = new JsonSerializer();
StringReader sr = new StringReader(json);
object o = serializer.Deserialize(new JsonTextReader(sr), typeof(T));
T t = o as T;
return t;
}

/// <summary>
/// 解析JSON数组生成对象实体集合
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <param name="json">json数组字符串(eg.[{"ID":"112","Name":"石子儿"}])</param>
/// <returns>对象实体集合</returns>
public static List<T> DeserializeJsonToList<T>(string json) where T : class
{
JsonSerializer serializer = new JsonSerializer();
StringReader sr = new StringReader(json);
object o = serializer.Deserialize(new JsonTextReader(sr), typeof(List<T>));
List<T> list = o as List<T>;
return list;
}

/// <summary>
/// 反序列化JSON到给定的匿名对象.
/// </summary>
/// <typeparam name="T">匿名对象类型</typeparam>
/// <param name="json">json字符串</param>
/// <param name="anonymousTypeObject">匿名对象</param>
/// <returns>匿名对象</returns>
public static T DeserializeAnonymousType<T>(string json, T anonymousTypeObject)
{
T t = JsonConvert.DeserializeAnonymousType(json, anonymousTypeObject);
return t;
}
}

测试理解

/// <summary>
/// Json测试
/// </summary>
public class JsonTest : IRun
{
public void Run()
{
Student sdudent = new Student();
sdudent.ID = 1;
sdudent.Name = "陈晨";
sdudent.NickName = "石子儿";
sdudent.Class = new Class() { Name = "CS0216", ID = 0216 };

//实体序列化和反序列化
string json1 = JsonHelper.SerializeObject(sdudent);
//json1 : {"ID":1,"Name":"陈晨","NickName":"石子儿","Class":{"ID":216,"Name":"CS0216"}}
Student sdudent1 = JsonHelper.DeserializeJsonToObject<Student>(json1);

//实体集合序列化和反序列化
List<Student> sdudentList = new List<Student>() { sdudent, sdudent1 };
string json2 = JsonHelper.SerializeObject(sdudentList);
//json: [{"ID":1,"Name":"陈晨","NickName":"石子儿","Class":{"ID":216,"Name":"CS0216"}},{"ID":1,"Name":"陈晨","NickName":"石子儿","Class":{"ID":216,"Name":"CS0216"}}]
List<Student> sdudentList2 = JsonHelper.DeserializeJsonToList<Student>(json2);

//DataTable序列化和反序列化
DataTable dt = new DataTable();
dt.TableName = "Student";
dt.Columns.Add("ID", typeof(int));
dt.Columns.Add("Name");
dt.Columns.Add("NickName");
DataRow dr = dt.NewRow();
dr["ID"] = 112;
dr["Name"] = "战三";
dr["NickName"] = "小三";
dt.Rows.Add(dr);
string json3 = JsonHelper.SerializeObject(dt);
//json3 : [{"ID":112,"Name":"战三","NickName":"小三"}]
DataTable sdudentDt3 = JsonHelper.DeserializeJsonToObject<DataTable>(json3);
List<Student> sdudentList3 = JsonHelper.DeserializeJsonToList<Student>(json3);

//验证对象和数组
Student sdudent4 = JsonHelper.DeserializeJsonToObject<Student>("{\"ID\":\"112\",\"Name\":\"石子儿\"}");
List<Student> sdudentList4 = JsonHelper.DeserializeJsonToList<Student>("[{\"ID\":\"112\",\"Name\":\"石子儿\"}]");

//匿名对象解析
var tempEntity = new { ID = 0, Name = string.Empty };
string json5 = JsonHelper.SerializeObject(tempEntity);
//json5 : {"ID":0,"Name":""}
tempEntity = JsonHelper.DeserializeAnonymousType("{\"ID\":\"112\",\"Name\":\"石子儿\"}", tempEntity);
var tempStudent = new Student();
tempStudent = JsonHelper.DeserializeAnonymousType("{\"ID\":\"112\",\"Name\":\"石子儿\"}", tempStudent);

Console.Read();
}

}

/// <summary>
/// 学生信息实体
/// </summary>
public class Student
{
public int ID { get; set; }
public string Name { get; set; }
public string NickName { get; set; }
public Class Class { get; set; }
}

/// <summary>
/// 学生班级实体
/// </summary>
public class Class
{
public int ID { get; set; }
public string Name { get; set; }
}

匿名对象解析

　　反序列化时，不想为其建立与其对应的.net类，可以用匿名对象解析方法DeserializeAnonymousType()实现解析：

//匿名对象解析
var tempEntity = new { ID = 0, Name = string.Empty };
string json5 = JsonHelper.SerializeObject(tempEntity);
//json5 : {"ID":0,"Name":""}
tempEntity = JsonHelper.DeserializeAnonymousType("{\"ID\":\"112\",\"Name\":\"石子儿\"}", tempEntity);
Console.WriteLine(tempEntity.ID + ":" + tempEntity.Name);

Json数组解析

　　json对象解析为.net对象，json数组解析为.net集合对象：

Student sdudent4 = JsonHelper.DeserializeJsonToObject<Student>("{\"ID\":\"112\",\"Name\":\"石子儿\"}");
List<Student> sdudentList4 = JsonHelper.DeserializeJsonToList<Student>("[{\"ID\":\"112\",\"Name\":\"石子儿\"}]");

参考

　　http://www.cnblogs.com/freshman0216/p/4161800.html