C#解析Json的类
//转：http://blog.csdn.net/jelly_bitores/archive/2010/10/13/5938244.aspx
using System;
using System.Collections.Generic;
using System.Web;
using System.Text.RegularExpressions;
using System.Text;
namespace System.JSON
{
static class JSONConvert
{
#region 全局变量
private static JSONObject _json = new JSONObject();//寄存器
private static readonly string _SEMICOLON = "@semicolon";//分号转义符
private static readonly string _COMMA = "@comma"; //逗号转义符
#endregion
#region 字符串转义
/// <summary>
/// 字符串转义,将双引号内的:和,分别转成_SEMICOLON和_COMMA
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
private static string StrEncode(string text)
{
MatchCollection matches = Regex.Matches(text, "\\\"[^\\\"]+\\\"");
foreach (Match match in matches)
{
text = text.Replace(match.Value, match.Value.Replace(":", _SEMICOLON).Replace(",", _COMMA));
}
return text;
}
/// <summary>
/// 字符串转义,将_SEMICOLON和_COMMA分别转成:和,
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
private static string StrDecode(string text)
{
return text.Replace(_SEMICOLON, ":").Replace(_COMMA, ",");
}
#endregion
#region JSON最小单元解析
/// <summary>
/// 最小对象转为JSONObject
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
private static JSONObject DeserializeSingletonObject(string text)
{
JSONObject jsonObject = new JSONObject();
MatchCollection matches = Regex.Matches(text, "(\\\"(?<key>[^\\\"]+)\\\":\\\"(?<value>[^,\\\"]+)\\\")|(\\\"(?<key>[^\\\"]+)\\\":(?<value>[^,\\\"\\}]+))");
foreach (Match match in matches)
{
string value = match.Groups["value"].Value;
jsonObject.Add(match.Groups["key"].Value, _json.ContainsKey(value) ? _json[value] : StrDecode(value));
}
return jsonObject;
}
/// <summary>
/// 最小数组转为JSONArray
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
private static JSONArray DeserializeSingletonArray(string text)
{
JSONArray jsonArray = new JSONArray();
MatchCollection matches = Regex.Matches(text, "(\\\"(?<value>[^,\\\"]+)\")|(?<value>[^,\\[\\]]+)");
foreach (Match match in matches)
{
string value = match.Groups["value"].Value;
jsonArray.Add(_json.ContainsKey(value) ? _json[value] : StrDecode(value));
}
return jsonArray;
}
/// <summary>
/// 反序列化
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
private static string Deserialize(string text)
{
text = StrEncode(text);//转义;和,
int count = 0;
string key = string.Empty;
string pattern = "(\\{[^\\[\\]\\{\\}]+\\})|(\\[[^\\[\\]\\{\\}]+\\])";
while (Regex.IsMatch(text, pattern))
{
MatchCollection matches = Regex.Matches(text, pattern);
foreach (Match match in matches)
{
key = "___key" + count + "___";
if (match.Value.Substring(0, 1) == "{")
_json.Add(key, DeserializeSingletonObject(match.Value));
else
_json.Add(key, DeserializeSingletonArray(match.Value));
text = text.Replace(match.Value, key);
count++;
}
}
return text;
}
#endregion
#region 公共接口
/// <summary>
/// 序列化JSONObject对象
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public static JSONObject DeserializeObject(string text)
{
_json = new JSONObject();
return _json[Deserialize(text)] as JSONObject;
}
/// <summary>
/// 序列化JSONArray对象
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public static JSONArray DeserializeArray(string text)
{
_json = new JSONObject();
return _json[Deserialize(text)] as JSONArray;
}
/// <summary>
/// 反序列化JSONObject对象
/// </summary>
/// <param name="jsonObject"></param>
/// <returns></returns>
public static string SerializeObject(JSONObject jsonObject)
{
StringBuilder sb = new StringBuilder();
sb.Append("{");
foreach (KeyValuePair<string, object> kvp in jsonObject)
{
if (kvp.Value is JSONObject)
{
sb.Append(string.Format("\"{0}\":{1},", kvp.Key, SerializeObject((JSONObject)kvp.Value)));
}
else if (kvp.Value is JSONArray)
{
sb.Append(string.Format("\"{0}\":{1},", kvp.Key, SerializeArray((JSONArray)kvp.Value)));
}
else if (kvp.Value is String)
{
sb.Append(string.Format("\"{0}\":\"{1}\",", kvp.Key, kvp.Value));
}
else
{
sb.Append(string.Format("\"{0}\":\"{1}\",", kvp.Key, ""));
}
}
if (sb.Length > 1)
sb.Remove(sb.Length - 1, 1);
sb.Append("}");
return sb.ToString();
}
/// <summary>
/// 反序列化JSONArray对象
/// </summary>
/// <param name="jsonArray"></param>
/// <returns></returns>
public static string SerializeArray(JSONArray jsonArray)
{
StringBuilder sb = new StringBuilder();
sb.Append("[");
for (int i = 0; i < jsonArray.Count; i++)
{
if (jsonArray[i] is JSONObject)
{
sb.Append(string.Format("{0},", SerializeObject((JSONObject)jsonArray[i])));
}
else if (jsonArray[i] is JSONArray)
{
sb.Append(string.Format("{0},", SerializeArray((JSONArray)jsonArray[i])));
}
else if (jsonArray[i] is String)
{
sb.Append(string.Format("\"{0}\",", jsonArray[i]));
}
else
{
sb.Append(string.Format("\"{0}\",", ""));
}
}
if (sb.Length > 1)
sb.Remove(sb.Length - 1, 1);
sb.Append("]");
return sb.ToString();
}
#endregion
}
/// <summary>
/// 取出JSON对象类
/// </summary>
public class JSONObject : Dictionary<string, object>
{
public new void Add(string key, object value)
{
System.Type t = value.GetType();
if (t.Name == "String")
{
value = JSONEncode.StrEncodeForDeserialize(value.ToString());
}
base.Add(key, value);
}
public override string ToString()
{
return JSONConvert.SerializeObject(this);
}
public static JSONObject FromObject(string json)
{
return JSONConvert.DeserializeObject(json);
}
}
/// <summary>
/// 取出JSON数组类
/// </summary>
public class JSONArray : List<object>
{
public new void Add(object item)
{
System.Type t = item.GetType();
if (t.Name == "String")
{
item = JSONEncode.StrEncodeForDeserialize(item.ToString());
}
base.Add(item);
}
public override string ToString()
{
return JSONConvert.SerializeArray(this);
}
public JSONArray FromObject(string json)
{
return JSONConvert.DeserializeArray(json);
}
}
/// <summary>
/// 字符串转义,将"{"、"}"、"""
/// </summary>
public class JSONEncode
{
public static readonly string _LEFTBRACES = "@leftbraces";//"{"转义符
public static readonly string _RIGHTBRACES = "@rightbraces";//"}"转义符
public static readonly string _LEFTBRACKETS = "@leftbrackets";//"["转义符
public static readonly string _RIGHTBRACKETS = "@rightbrackets";//"]"转义符
public static readonly string _DOUBLEQUOTATIONMARKS = "@doubleQuotationMarks";//"""转义符
#region 字符串转义
/// <summary>
/// 字符串转义,将"{"、"}"、""",分别转换_LEFTBRACES、_RIGHTBRACES、_DOUBLEQUOTATIONMARKS
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public static string StrEncodeForDeserialize(string text)
{
return text
.Replace("{", _LEFTBRACES)
.Replace("}", _RIGHTBRACES)
.Replace("[", _LEFTBRACKETS)
.Replace("]", _RIGHTBRACKETS)
.Replace("\"", _DOUBLEQUOTATIONMARKS);
}
/// <summary>
/// 字符串转义,将_LEFTBRACES、_RIGHTBRACES、_DOUBLEQUOTATIONMARKS,分别转换"{"、"}"、"""
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public static string StrDecodeForDeserialize(string text)
{
return text.Replace(_LEFTBRACES, "{")
.Replace(_RIGHTBRACES, "}")
.Replace(_LEFTBRACKETS, "[")
.Replace(_RIGHTBRACKETS, "]")
.Replace(_DOUBLEQUOTATIONMARKS, "\"");
}
#endregion
}
}