publicstaticvoid JsonConvertDemo()
{
User user =new User { UserId =1, UserName ="李刚", CreateDate = DateTimeNowAddYears(-30), Birthday = DateTimeNowAddYears(-50), Priority = PriorityBelowNormal, Salary =5000 };
//JsonConvert类在NewtonsoftJsonNetdll中，注意到下载这个dll并添加这个引用
//JSON序列化
string result = JsonConvertSerializeObject(user);
ConsoleWriteLine("使用JsonConvert序列化后的结果：{0},长度：{1}", result, resultLength);
//JSON反序列化
user = JsonConvertDeserializeObject<User>(result);
ConsoleWriteLine("使用JsonConvert反序列化后的结果：UserId:{0},UserName: {1},CreateDate:{2},Priority:{3}", userUserId, userUserName, userCreateDate, userPriority);
}
publicstaticvoid JsonConvertLinqDemo()
{
User user =new User { UserId =1, UserName ="周公", CreateDate = DateTimeNowAddYears(-8), Birthday = DateTimeNowAddYears(-32), Priority = PriorityLowest, Salary =500, Urls =new List<string> { "http://zhoufoxcnblog51ctocom", "https://www.jb51.net" } };
//JsonConvert类在NewtonsoftJsonNetdll中，注意到下载这个dll并添加这个引用
//JSON序列化
string result = JsonConvertSerializeObject(user);
ConsoleWriteLine("使用JsonConvert序列化后的结果：{0},长度：{1}", result, resultLength);
//使用Linq to JSON
JObject jobject = JObjectParse(result);
JToken token = jobject["Urls"];
List<string> urlList =new List<string>();
foreach (JToken t in token)
{
urlListAdd(tToString());
}
ConsoleWrite("使用Linq to JSON反序列化后的结果：[");
for (int i =0; i < urlListCount -1;i++ )
{
ConsoleWrite(urlList[i] +",");
}
ConsoleWriteLine(urlList[urlListCount -1] +"]");
}
注意：如果有不需要序列化的字段，可以给该字段添加[JsonIgnore]标记。在Newtonsoft这个类库中对于日期的序列化有多种方式，可以类的DataTime成员添加上对应的标记，这样在进行序列化和反序列化时就会按照指定的方式进行，在本例中User类的CreateDate属性添加的属性是[JsonConverter(typeof(IsoDateTimeConverter))]，而Birthday属性添加的属性是[JsonConverter(typeof(JavaScriptDateTimeConverter))]，从序列化的结果可以看出来它们最终的表现形式并不一样。
本文中所有的示例代码如下：
复制代码 代码如下:
using System;
using SystemCollectionsGeneric;
using SystemLinq;
using SystemText;
using SystemWebScriptSerialization;
using SystemRuntimeSerializationJson;
using SystemIO;
using SystemRuntimeSerialization;
using NewtonsoftJson;
using NewtonsoftJsonLinq;
using NewtonsoftJsonConverters;
namespace JSONDemo
{
class Program
{
staticvoid Main(string[] args)
{
JavaScriptSerializerDemo();
DataContractJsonSerializerDemo();
JsonConvertDemo();
JsonConvertLinqDemo();
ConsoleReadLine();
}
publicstaticvoid JavaScriptSerializerDemo()
{
User user =new User { UserId =1, UserName ="李刚", CreateDate = DateTimeNowAddYears(-30),Birthday=DateTimeNowAddYears(-50), Priority = PriorityHighest, Salary =500000 };
//JavaScriptSerializer类在SystemWebExtensionsdll中，注意添加这个引用
JavaScriptSerializer serializer =new JavaScriptSerializer();
//JSON序列化
string result=serializerSerialize(user);
ConsoleWriteLine("使用JavaScriptSerializer序列化后的结果：{0},长度：{1}", result, resultLength);
//JSON反序列化
user = serializerDeserialize<User>(result);
ConsoleWriteLine("使用JavaScriptSerializer反序列化后的结果：UserId:{0},UserName:{1},CreateDate:{2},Priority:{3}", userUserId, userUserName, userCreateDate, userPriority);
}
publicstaticvoid DataContractJsonSerializerDemo()
{
User user =new User { UserId =1, UserName ="李刚", CreateDate = DateTimeNowAddYears(-30), Birthday = DateTimeNowAddYears(-50), Priority = PriorityAboveNormal, Salary =50000 };
string result =stringEmpty;
//DataContractJsonSerializer类在SystemServiceModelWebdll中，注意添加这个引用
DataContractJsonSerializer serializer =new DataContractJsonSerializer(typeof(User));
using (MemoryStream stream =new MemoryStream())
{
//JSON序列化
serializerWriteObject(stream, user);
result = EncodingUTFGetString(streamToArray());
ConsoleWriteLine("使用DataContractJsonSerializer序列化后的结果：{0},长度：{1}", result, resultLength);
}
//JSON反序列化
byte[] buffer = EncodingUTFGetBytes(result);
using (MemoryStream stream =new MemoryStream(buffer))
{
user = serializerReadObject(stream) as User;
ConsoleWriteLine("使用DataContractJsonSerializer反序列化后的结果：UserId:{0},UserName:{1},CreateDate:{2},Priority:{3}", userUserId, userUserName, userCreateDate, userPriority);
}
}
publicstaticvoid JsonConvertDemo()
{
User user =new User { UserId =1, UserName ="李刚", CreateDate = DateTimeNowAddYears(-30), Birthday = DateTimeNowAddYears(-50), Priority = PriorityBelowNormal, Salary =5000 };
//JsonConvert类在NewtonsoftJsonNetdll中，注意到下载这个dll并添加这个引用
//JSON序列化
string result = JsonConvertSerializeObject(user);
ConsoleWriteLine("使用JsonConvert序列化后的结果：{0},长度：{1}", result, resultLength);
//JSON反序列化
user = JsonConvertDeserializeObject<User>(result);
ConsoleWriteLine("使用JsonConvert反序列化后的结果：UserId:{0},UserName:{1},CreateDate:{2},Priority:{3}", userUserId, userUserName, userCreateDate, userPriority);
}
publicstaticvoid JsonConvertLinqDemo()
{
User user =new User { UserId =1, UserName ="周公", CreateDate = DateTimeNowAddYears(-8), Birthday = DateTimeNowAddYears(-32), Priority = PriorityLowest, Salary =500, Urls =new List<string> { "http://zhoufoxcnblog51ctocom", "https://www.jb51.net" } };
//JsonConvert类在NewtonsoftJsonNetdll中，注意到下载这个dll并添加这个引用
//JSON序列化
string result = JsonConvertSerializeObject(user);
ConsoleWriteLine("使用JsonConvert序列化后的结果：{0},长度：{1}", result, resultLength);
//使用Linq to JSON
JObject jobject = JObjectParse(result);
JToken token = jobject["Urls"];
List<string> urlList =new List<string>();
foreach (JToken t in token)
{
urlListAdd(tToString());
}
ConsoleWrite("使用Linq to JSON反序列化后的结果：[");
for (int i =0; i < urlListCount -1;i++ )
{
ConsoleWrite(urlList[i] +",");
}
ConsoleWriteLine(urlList[urlListCount -1] +"]");
}
}
[DataContract]
publicclass User
{
///<summary>
/// 编号
///</summary>
[DataMember]
publicint UserId { get; set; }
///<summary>
/// 用户名
///</summary>
[DataMember]
publicstring UserName { get; set; }
///<summary>
/// 创建时间
///</summary>
[DataMember]
[JsonConverter(typeof(IsoDateTimeConverter))]
public DateTime CreateDate { get; set; }
///<summary>
/// 生日
///</summary>
[DataMember]
[JsonConverter(typeof(JavaScriptDateTimeConverter))]
public DateTime Birthday { get; set; }
///<summary>
/// 相关URL
///</summary>
[DataMember]
public List<string> Urls { get; set; }
///<summary>
/// 薪水
///</summary>
[ScriptIgnore]//使用JavaScriptSerializer序列化时不序列化此字段
[IgnoreDataMember]//使用DataContractJsonSerializer序列化时不序列化此字段
[JsonIgnore]//使用JsonConvert序列化时不序列化此字段
publicint Salary { get; set; }
///<summary>
/// 权利级别
///</summary>
[DataMember]
public Priority Priority { get; set; }
public User()
{
Urls =new List<string>();
}
}
///<summary>
/// 权利级别
///</summary>
publicenum Priority:byte
{
Lowest=0x1,
BelowNormal=0x2,
Normal=0x4,
AboveNormal=0x8,
Highest=0x16
}
}
程序的运行结果如下：
1.使用JavaScriptSerializer序列化后的结果：{"UserId":1,"UserName":"李刚","CreateDate":"\/Date(353521211984)\/","Birthday":"\/Date(-277630788015)\/","Urls":[],"Priority":22},长度：127
2.使用JavaScriptSerializer反序列化后的结果：UserId:1,UserName:李刚,CreateDate:1981-3-15 16:20:11,Priority:Highest
3.使用DataContractJsonSerializer序列化后的结果：{"Birthday":"\/Date(-277630787953+0800)\/","CreateDate":"\/Date(353521212046+0800)\/","Priority":8,"Urls":[],"UserId":1,"UserName":"李刚"},长度：136
4.使用DataContractJsonSerializer反序列化后的结果：UserId:1,UserName:李刚,CreateDate:1981-3-16 0:20:12,Priority:AboveNormal
5.使用JsonConvert序列化后的结果：{"UserId":1,"UserName":"李刚","CreateDate":"1981-03-16T00:20:12.1875+08:00","Birthday":new Date(-277630787812),"Urls":[],"Priority":2},长度：132
6.使用JsonConvert反序列化后的结果：UserId:1,UserName:李刚,CreateDate:1981-3-16 0:20:12,Priority:BelowNormal
7.使用JsonConvert序列化后的结果：{"UserId":1,"UserName":"周公","CreateDate":"2003-03-16T00:20:12.40625+08:00","Birthday":new Date(290362812406),"Urls":["http://office.jb51.net","https://www.jb51.net/web"],"Priority":1},长度：198
8.使用Linq to JSON反序列化后的结果：["http://office.jb51.net",https://www.jb51.net/web]
总结：通过上面的例子大家可以看出Newtonsoft类库提供的JSON序列化和反序列的方式更加灵活，在实际开发中周公也一直使用Newtonsoft作为JSON序列化和反序列化的不二选择。
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