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json开始流行了,性能比xml快,所以好多js类库(如jquery)都支持json格式了,通过ASP.NET与js的结合操作json数据传递应该很爽,所以本文使用C#开发一个json类,在看文章前推荐你一些文章: 下面是类的源码: 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Text.RegularExpressions; 6 7 namespace JSONTest 8 { 9 class JSONConvert 10 { 11 #region 全局变量 12 13 private static JSONObject _json = new JSONObject();//寄存器 14 private static readonly string _SEMICOLON = "@semicolon";//分号转义符 15 private static readonly string _COMMA = "@comma"; //逗号转义符 16 17 #endregion 18 19 #region 字符串转义 20 /// <summary> 21 /// 字符串转义,将双引号内的:和,分别转成_SEMICOLON和_COMMA 22 /// </summary> 23 /// <param name="text"></param> 24 /// <returns></returns> 25 private static string StrEncode(string text) 26 { 27 MatchCollection matches = Regex.Matches(text, "\\\"[^\\\"]+\\\""); 28 foreach (Match match in matches) 29 { 30 text = text.Replace(match.Value, match.Value.Replace(":", _SEMICOLON).Replace(",", _COMMA)); 31 } 32 33 return text; 34 } 35 36 /// <summary> 37 /// 字符串转义,将_SEMICOLON和_COMMA分别转成:和, 38 /// </summary> 39 /// <param name="text"></param> 40 /// <returns></returns> 41 private static string StrDecode(string text) 42 { 43 return text.Replace(_SEMICOLON, ":").Replace(_COMMA, ","); 44 } 45 46 #endregion 47 48 #region JSON最小单元解析 49 50 /// <summary> 51 /// 最小对象转为JSONObject 52 /// </summary> 53 /// <param name="text"></param> 54 /// <returns></returns> 55 private static JSONObject DeserializeSingletonObject(string text) 56 { 57 JSONObject jsonObject = new JSONObject(); 58 59 MatchCollection matches = Regex.Matches(text, "(\\\"(?<key>[^\\\"]+)\\\":\\\"(?<value>[^,\\\"]+)\\\")|(\\\"(?<key>[^\\\"]+)\\\":(?<value>[^,\\\"\\}]+))"); 60 foreach (Match match in matches) 61 { 62 string value = match.Groups["value"].Value; 63 jsonObject.Add(match.Groups["key"].Value, _json.ContainsKey(value) ? _json[value] : StrDecode(value)); 64 } 65 66 return jsonObject; 67 } 68 69 /// <summary> 70 /// 最小数组转为JSONArray 71 /// </summary> 72 /// <param name="text"></param> 73 /// <returns></returns> 74 private static JSONArray DeserializeSingletonArray(string text) 75 { 76 JSONArray jsonArray = new JSONArray(); 77 78 MatchCollection matches = Regex.Matches(text, "(\\\"(?<value>[^,\\\"]+)\")|(?<value>[^,\\[\\]]+)"); 79 foreach (Match match in matches) 80 { 81 string value = match.Groups["value"].Value; 82 jsonArray.Add(_json.ContainsKey(value) ? _json[value] : StrDecode(value)); 83 } 84 85 return jsonArray; 86 } 87 88 /// <summary> 89 /// 反序列化 90 /// </summary> 91 /// <param name="text"></param> 92 /// <returns></returns> 93 private static string Deserialize(string text) 94 { 95 text = StrEncode(text);//转义;和, 96 97 int count = 0; 98 string key = string.Empty; 99 string pattern = "(\\{[^\\[\\]\\{\\}]+\\})|(\\[[^\\[\\]\\{\\}]+\\])"; 100 101 while (Regex.IsMatch(text, pattern)) 102 { 103 MatchCollection matches = Regex.Matches(text, pattern); 104 foreach (Match match in matches) 105 { 106 key = "___key" + count + "___"; 107 108 if (match.Value.Substring(0, 1) == "{") 109 _json.Add(key, DeserializeSingletonObject(match.Value)); 110 else 111 _json.Add(key, DeserializeSingletonArray(match.Value)); 112 113 text = text.Replace(match.Value, key); 114 115 count++; 116 } 117 } 118 return text; 119 } 120 121 #endregion 122 123 #region 公共接口 124 125 /// <summary> 126 /// 序列化JSONObject对象 127 /// </summary> 128 /// <param name="text"></param> 129 /// <returns></returns> 130 public static JSONObject DeserializeObject(string text) 131 { 132 _json = new JSONObject(); 133 return _json[Deserialize(text)] as JSONObject; 134 } 135 136 /// <summary> 137 /// 序列化JSONArray对象 138 /// </summary> 139 /// <param name="text"></param> 140 /// <returns></returns> 141 public static JSONArray DeserializeArray(string text) 142 { 143 _json = new JSONObject(); 144 return _json[Deserialize(text)] as JSONArray; 145 } 146 147 /// <summary> 148 /// 反序列化JSONObject对象 149 /// </summary> 150 /// <param name="jsonObject"></param> 151 /// <returns></returns> 152 public static string SerializeObject(JSONObject jsonObject) 153 { 154 StringBuilder sb = new StringBuilder(); 155 sb.Append("{"); 156 foreach (KeyValuePair<string, object> kvp in jsonObject) 157 { 158 if (kvp.Value is JSONObject) 159 { 160 sb.Append(string.Format("\"{0}\":{1},", kvp.Key, SerializeObject((JSONObject)kvp.Value))); 161 } 162 else if (kvp.Value is JSONArray) 163 { 164 sb.Append(string.Format("\"{0}\":{1},", kvp.Key, SerializeArray((JSONArray)kvp.Value))); 165 } 166 else if (kvp.Value is String) 167 { 168 sb.Append(string.Format("\"{0}\":\"{1}\",", kvp.Key, kvp.Value)); 169 } 170 else 171 { 172 sb.Append(string.Format("\"{0}\":\"{1}\",", kvp.Key, "")); 173 } 174 } 175 if (sb.Length > 1) 176 sb.Remove(sb.Length - 1, 1); 177 sb.Append("}"); 178 return sb.ToString(); 179 } 180 181 /// <summary> 182 /// 反序列化JSONArray对象 183 /// </summary> 184 /// <param name="jsonArray"></param> 185 /// <returns></returns> 186 public static string SerializeArray(JSONArray jsonArray) 187 { 188 StringBuilder sb = new StringBuilder(); 189 sb.Append("["); 190 for (int i = 0; i < jsonArray.Count; i++) 191 { 192 if (jsonArray[i] is JSONObject) 193 { 194 sb.Append(string.Format("{0},", SerializeObject((JSONObject)jsonArray[i]))); 195 } 196 else if (jsonArray[i] is JSONArray) 197 { 198 sb.Append(string.Format("{0},", SerializeArray((JSONArray)jsonArray[i]))); 199 } 200 else if (jsonArray[i] is String) 201 { 202 sb.Append(string.Format("\"{0}\",", jsonArray[i])); 203 } 204 else 205 { 206 sb.Append(string.Format("\"{0}\",", "")); 207 } 208 209 } 210 if (sb.Length > 1) 211 sb.Remove(sb.Length - 1, 1); 212 sb.Append("]"); 213 return sb.ToString(); 214 } 215 #endregion 216 } 217 218 /// <summary> 219 /// 取出JSON对象类 220 /// </summary> 221 public class JSONObject : Dictionary<string, object> 222 { 223 public new void Add(string key, object value) 224 { 225 System.Type t = value.GetType(); 226 227 if (t.Name == "String") 228 { 229 value = JSONEncode.StrEncodeForDeserialize(value.ToString()); 230 } 231 232 base.Add(key, value); 233 } 234 public override string ToString() 235 { 236 return JSONConvert.SerializeObject(this); 237 } 238 public static JSONObject FromObject(string json) 239 { 240 return JSONConvert.DeserializeObject(json); 241 } 242 } 243 244 /// <summary> 245 /// 取出JSON数组类 246 /// </summary> 247 public class JSONArray : List<object> 248 { 249 public new void Add(object item) 250 { 251 System.Type t = item.GetType(); 252 253 if (t.Name == "String") 254 { 255 item = JSONEncode.StrEncodeForDeserialize(item.ToString()); 256 } 257 258 base.Add(item); 259 } 260 public override string ToString() 261 { 262 return JSONConvert.SerializeArray(this); 263 } 264 public JSONArray FromObject(string json) 265 { 266 return JSONConvert.DeserializeArray(json); 267 } 268 } 269 270 /// <summary> 271 /// 字符串转义,将"{"、"}"、""" 272 /// </summary> 273 public class JSONEncode 274 { 275 public static readonly string _LEFTBRACES = "@leftbraces";//"{"转义符 276 public static readonly string _RIGHTBRACES = "@rightbraces";//"}"转义符 277 public static readonly string _LEFTBRACKETS = "@leftbrackets";//"["转义符 278 public static readonly string _RIGHTBRACKETS = "@rightbrackets";//"]"转义符 279 public static readonly string _DOUBLEQUOTATIONMARKS = "@doubleQuotationMarks";//"""转义符 280 281 282 #region 字符串转义 283 /// <summary> 284 /// 字符串转义,将"{"、"}"、""",分别转换_LEFTBRACES、_RIGHTBRACES、_DOUBLEQUOTATIONMARKS 285 /// </summary> 286 /// <param name="text"></param> 287 /// <returns></returns> 288 public static string StrEncodeForDeserialize(string text) 289 { 290 return text 291 .Replace("{", _LEFTBRACES) 292 .Replace("}", _RIGHTBRACES) 293 .Replace("[", _LEFTBRACKETS) 294 .Replace("]", _RIGHTBRACKETS) 295 .Replace("\"", _DOUBLEQUOTATIONMARKS); 296 } 297 298 /// <summary> 299 /// 字符串转义,将_LEFTBRACES、_RIGHTBRACES、_DOUBLEQUOTATIONMARKS,分别转换"{"、"}"、""" 300 /// </summary> 301 /// <param name="text"></param> 302 /// <returns></returns> 303 public static string StrDecodeForDeserialize(string text) 304 { 305 return text.Replace(_LEFTBRACES, "{") 306 .Replace(_RIGHTBRACES, "}") 307 .Replace(_LEFTBRACKETS, "[") 308 .Replace(_RIGHTBRACKETS, "]") 309 .Replace(_DOUBLEQUOTATIONMARKS, "\""); 310 } 311 #endregion 312 } 313 } json写完了,下面来看下使用的方法: 1 //序列化 2 JSONArray jsonArray = new JSONArray(); 3 jsonArray.Add("2006"); 4 jsonArray.Add("2007"); 5 jsonArray.Add("2008"); 6 jsonArray.Add("2009"); 7 jsonArray.Add("2010"); 8 9 JSONObject jsonObject = new JSONObject(); 10 jsonObject.Add("domain", "mzwu.com"); 11 jsonObject.Add("years", jsonArray); 12 13 Console.WriteLine(JSONConvert.SerializeObject(jsonObject)); 14 //反序列化 "{/"domain/":/"mzwu.com/",/"years/":[2006,2007,2008,2009,2010]}" 15 JSONObject json = JSONConvert.DeserializeObject(JSONConvert.SerializeObject(jsonObject)); 16 if (json != null) 17 { 18 Console.WriteLine(json["domain"]); 19 Console.WriteLine(((JSONArray)json["years"])[3]); 20 }
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