Json的序列化和反序列化（一）



补充知识：

1.字符串转比特数组
 
(1)byte[] bt=System.Text.Encoding.Default.GetBytes("字符串");
 
(2)byte[] bt=Convert.FromBase64String("字符串");
 
2.字符串转流
 
(1)MemoryStream ms=new MemoryStream(System.Text.Encoding.Default.GetBytes("字符串"));
 
(2)MemoryStream ms=new MemoryStream(Convert.FromBase64String("字符串"));
 
3.流转比特数组
 
(1)byte[] bt=ms.ToArray();
 
(2)MemoryStream ms=new MemoryStream();ms.Write(bt,0,ms.Length);
 
4.流转字符串
 
(1)string str=Convert.ToBase64String(ms.ToArray());
 
(2)string str=System.Text.Encoding.Default.GetString(ms.ToArray());
 
5.比特数组转字符串
 
(1)string str=System.Text.Encoding.Default.GetString(bt);
 
(2)string str=Convert.ToBase64String(bt);
 
6.比特数组转流
 
(1)MemoryStream ms=new MemoryStream(bt);
 
(2)MemoryStream ms=new MemoryStream();ms.Read(bt,0,bt.Lenght);

 

 

1. 添加引用System.ServiceModel.Web

2. 创建类

[csharp] view plaincopyprint?

1. public class JsonHelper  
2.  {  
3.      // 序列化  
4.      public static  string JsonSerializer<T>(T t)  
5.      {  
6.          // 使用 DataContractJsonSerializer 将 T 对象序列化为内存流。   
7.          DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof (T));  
8.          MemoryStream ms = new MemoryStream();  
9.          // 使用 WriteObject 方法将 JSON 数据写入到流中。   
10.          jsonSerializer.WriteObject(ms, t);  
11.          // 流转字符串  
12.          string jsonString = Encoding.UTF8.GetString(ms.ToArray());  
13.          ms.Close();  
14.          //替换Json的Date字符串    
15.          string p = @"\\/Date\((\d+)\+\d+\)\\/";     
16.          MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);    
17.          Regex reg = new Regex(p);     
18.          jsonString = reg.Replace(jsonString, matchEvaluator);  
19.          return jsonString;  
20.      }  
21.      public static T JsonDeserialize<T>(string  jsonString)  
22.      {  
23.          //将"yyyy-MM-dd HH:mm:ss"格式的字符串转为"\/Date(1294499956278+0800)\/"格式    
24.          string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}";     
25.          MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertDateStringToJsonDate);     
26.          Regex reg = new Regex(p);    
27.          jsonString = reg.Replace(jsonString, matchEvaluator);  
28.          DataContractJsonSerializer jsonSerializer=new DataContractJsonSerializer(typeof(T));  
29.          // 字符串转流  
30.          MemoryStream ms=new MemoryStream(Encoding.UTF8.GetBytes(jsonString));  
31.          // 通过使用 DataContractJsonSerializer 的 ReadObject 方法，将 JSON 编码数据反序列化为T   
32.          T obj = (T) jsonSerializer.ReadObject(ms);  
33.          return obj;  
34.      }  
35.      public static string ConvertJsonDateToDateString(Match match)  
36.      {  
37.          string result = string.Empty;  
38.          DateTime dateTime=new DateTime(1970,1,1);  
39.          dateTime = dateTime.AddMilliseconds(long.Parse(match.Groups[1].Value));  
40.          dateTime = dateTime.ToLocalTime();  
41.          result = dateTime.ToString("yyyy-MM-dd HH:mm:ss");  
42.          return result;  
43.      }  
44.      private static string ConvertDateStringToJsonDate(Match m)  
45.      {  
46.          string result = string.Empty;     
47.          DateTime dt = DateTime.Parse(m.Groups[0].Value);   
48.          dt = dt.ToUniversalTime();     
49.          TimeSpan ts = dt - DateTime.Parse("1970-01-01");    
50.          result = string.Format("\\/Date({0}+0800)\\/",ts.TotalMilliseconds);     
51.          return result;     
52.      }  
53.  }  
54.  public class Person  
55.  {  
56.      public string Name { get; set; }  
57.      public int Age { get; set; }  
58.      public DateTime dateTime { get; set; }  
59.  }  

   public class JsonHelper    {        // 序列化        public static  string JsonSerializer<T>(T t)        {            // 使用 DataContractJsonSerializer 将 T 对象序列化为内存流。             DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof (T));            MemoryStream ms = new MemoryStream();            // 使用 WriteObject 方法将 JSON 数据写入到流中。             jsonSerializer.WriteObject(ms, t);            // 流转字符串            string jsonString = Encoding.UTF8.GetString(ms.ToArray());            ms.Close();            //替换Json的Date字符串              string p = @"\\/Date\((\d+)\+\d+\)\\/";               MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);              Regex reg = new Regex(p);               jsonString = reg.Replace(jsonString, matchEvaluator);            return jsonString;        }        public static T JsonDeserialize<T>(string  jsonString)        {            //将"yyyy-MM-dd HH:mm:ss"格式的字符串转为"\/Date(1294499956278+0800)\/"格式              string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}";               MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertDateStringToJsonDate);               Regex reg = new Regex(p);              jsonString = reg.Replace(jsonString, matchEvaluator);            DataContractJsonSerializer jsonSerializer=new DataContractJsonSerializer(typeof(T));            // 字符串转流            MemoryStream ms=new MemoryStream(Encoding.UTF8.GetBytes(jsonString));            // 通过使用 DataContractJsonSerializer 的 ReadObject 方法，将 JSON 编码数据反序列化为T             T obj = (T) jsonSerializer.ReadObject(ms);            return obj;        }        public static string ConvertJsonDateToDateString(Match match)        {            string result = string.Empty;            DateTime dateTime=new DateTime(1970,1,1);            dateTime = dateTime.AddMilliseconds(long.Parse(match.Groups[1].Value));            dateTime = dateTime.ToLocalTime();            result = dateTime.ToString("yyyy-MM-dd HH:mm:ss");            return result;        }        private static string ConvertDateStringToJsonDate(Match m)        {            string result = string.Empty;               DateTime dt = DateTime.Parse(m.Groups[0].Value);             dt = dt.ToUniversalTime();               TimeSpan ts = dt - DateTime.Parse("1970-01-01");              result = string.Format("\\/Date({0}+0800)\\/",ts.TotalMilliseconds);               return result;           }    }    public class Person    {        public string Name { get; set; }        public int Age { get; set; }        public DateTime dateTime { get; set; }    }

 

3. 后台代码实现

[csharp] view plaincopyprint?

1. protected void Page_Load(object sender, EventArgs e)  
2.        {  
3.            // 序列化  
4.            Person p = new Person();  
5.            p.Name = "Bradley";  
6.            p.Age = 24;  
7.            p.dateTime = DateTime.Now;  
8.            string jsonString = JsonHelper.JsonSerializer<Person>(p);  
9.            Response.Write(jsonString);  
10.            Response.Write("</br>");  
11.            // 反序列化  
12.            string jsonString1 = "{\"Age\":28,\"Name\":\"张三\"}";      
13.            Person p1 = JsonHelper.JsonDeserialize<Person>(jsonString);  
14.            Response.Write(p1.Name+":"+p1.Age.ToString()+"Time:"+p.dateTime.ToString());  
15.   
16.            // 序列化字典  
17.            Dictionary<string,string> dictionary=new Dictionary<string, string>();  
18.            dictionary.Add("Name:","Bradley");  
19.            dictionary.Add("Age:","24");  
20.            string jsonString2 = JsonHelper.JsonSerializer<Dictionary<string, string>>(dictionary);  
21.            Response.Write("</br>");  
22.            Response.Write(jsonString2);  
23.        }  

 protected void Page_Load(object sender, EventArgs e)        {            // 序列化            Person p = new Person();            p.Name = "Bradley";            p.Age = 24;            p.dateTime = DateTime.Now;            string jsonString = JsonHelper.JsonSerializer<Person>(p);            Response.Write(jsonString);            Response.Write("</br>");            // 反序列化            string jsonString1 = "{\"Age\":28,\"Name\":\"张三\"}";                Person p1 = JsonHelper.JsonDeserialize<Person>(jsonString);            Response.Write(p1.Name+":"+p1.Age.ToString()+"Time:"+p.dateTime.ToString());            // 序列化字典            Dictionary<string,string> dictionary=new Dictionary<string, string>();            dictionary.Add("Name:","Bradley");            dictionary.Add("Age:","24");            string jsonString2 = JsonHelper.JsonSerializer<Dictionary<string, string>>(dictionary);            Response.Write("</br>");            Response.Write(jsonString2);        }

 

 转自：http://blog.csdn.net/bradleydan/article/details/7925972