C# & JSON
DataContractJsonSerializer
// JsonHelper.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Text;
namespace JsonHelper
{
public class JsonHelper
{
/// <summary>
/// 对象转换成JSON
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="jsonObject">需要格式化的对象</param>
/// <returns>Json字符串</returns>
public static string Serialize<T>(T jsonObject)
{
DataContractJsonSerializerSettings settings = new DataContractJsonSerializerSettings();
//settings.UseSimpleDictionaryFormat = true;
//settings.IgnoreExtensionDataObject = true;
//settings.SerializeReadOnlyTypes = true;
DataContractJsonSerializer serializer = new DataContractJsonSerializer(type: jsonObject.GetType(), settings: settings);
using (MemoryStream stream = new MemoryStream())
{
serializer.WriteObject(stream: stream, graph: jsonObject);
stream.Position = 0;
StreamReader reader = new StreamReader(stream: stream);
string jsonString = reader.ReadToEnd();
return jsonString;
}
}
/// <summary>
/// JSON字符串转换成对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="jsonString">要转换成对象的JSON字符串</param>
/// <returns></returns>
public static T Deserialize<T>(string jsonString)
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(type: typeof(T));
byte[] buffer = Encoding.UTF8.GetBytes(s: jsonString);
using (MemoryStream stream = new MemoryStream(buffer: buffer))
{
T t = (T)serializer.ReadObject(stream: stream);
return t;
}
}
}
}
哔了个狗
以上面的 JsonUtil 为例.
using System;
using System.Collections;
using System.Collections.Generic;
using JsonUtil;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace JsonHelper.Test
{
[TestClass]
public class TestJson
{
[TestMethod]
public void Json1()
{
IDictionary<string, object> dict = new Dictionary<string, object>();
dict.Add("name", "张三");
dict.Add("age", 18);
dict.Add("birthday", DateTime.Now);
// 匿名类型序列化报错
//dict.Add("other", new
//{
// xxx = "xxx"
//});
// 嵌套字典类型序列化报错
var c = new Dictionary<string, object>();
c.Add("xxx", "xxx");
dict.Add("other", c);
string jsonStr = JsonUtil.Serialize(dict);
if (string.IsNullOrEmpty(jsonStr))
{
Assert.Fail();
}
}
[TestMethod]
public void Json2()
{
Hashtable hashtable = new Hashtable();
hashtable.Add("name", "张三");
hashtable.Add("age", 18);
hashtable.Add("birthday", DateTime.Now);
// 嵌套 Hashtable 可以序列化,但是会多出点奇怪的东西
Hashtable hashtable2 = new Hashtable();
hashtable2.Add("xxx", "xxx");
hashtable.Add("other", hashtable2);
string jsonStr = JsonUtil.Serialize(hashtable);
if (string.IsNullOrEmpty(jsonStr))
{
Assert.Fail();
}
}
}
}
我只是不想一些库依赖
Newtonsoft.Json而已,能不能让我好好序列化个JSON.
DataContractJsonSerializer功能受限,写法繁琐,时不时还来个不能序列化;.NET Core 里干脆连这个类都没了,目前还是采用Newtonsoft.Json比较方便.
DataContractJsonSerializer不支持序列化匿名类型
参考