1 using System;  2   3   4   5 /// <summary>  6 /// UTF8字符串转换为汉字用的类  7 /// 转换如"\\u8d35"之类的字符串为对应的汉字  8 /// </summary>  9 class UTF8String 10 { 11     string m_strContent = ""; 12     /// <summary> 13     /// 构造函数 14     /// </summary> 15     /// <param name="content">要转换的字符串</param> 16     public UTF8String(string content) 17     { 18         m_strContent = content; 19     } 20     public string getContent() 21     { 22         return m_strContent; 23     } 24     /// <summary> 25     /// 转换函数 26     /// </summary> 27     /// <returns>返回转换好的字符串</returns> 28     public string ToString() 29     { 30         string reString = null; 31         char[] content = m_strContent.ToCharArray(); //把字符串变为字符数组，以进行处理 32         for (int i = 0; i < content.Length; i++) //遍历所有字符 33         { 34             if (content[i] == ‘\\‘) //判断是否转义字符 \  35             { 36                 switch (content[i + 1]) //判断转义字符的下一个字符是什么 37                 { 38                     case ‘u‘: //转换的是汉字 39                     case ‘U‘: 40                         reString += HexArrayToChar(content, i + 2); //获取对应的汉字 41                         i = i + 5; 42                         break; 43                     case ‘/‘: //转换的是 / 44                     case ‘\\‘: //转换的是 \ 45                     case ‘"‘: 46                         break; 47                     default: //其它 48                         reString += EscapeCharacter(content[i + 1]); //转为其它类型字符 49                         i = i + 1; 50                         break; 51                 } 52             } 53             else 54                 reString += content[i]; //非转义字符则直接加入 55         } 56         return reString; 57     } 58  59     /// <summary> 60     /// 字符数组转对应汉字字符 61     /// </summary> 62     /// <param name="content">要转换的数字</param> 63     /// <param name="startIndex">起始位置</param> 64     /// <returns>对应的汉字</returns> 65     private char HexArrayToChar(char[] content, int startIndex) 66     { 67         char[] ac = new char[4]; 68         for (int i = 0; i < 4; i++) //获取要转换的部分 69             ac[i] = content[startIndex + i]; 70         string num = new string(ac); //字符数组转为字符串 71         return HexStringToChar(num); 72     } 73  74     /// <summary> 75     /// 转义字符转换函数 76     /// 转换字符为对应的转义字符 77     /// </summary> 78     /// <param name="c">要转的字符</param> 79     /// <returns>对应的转义字符</returns> 80     private char EscapeCharacter(char c) 81     { 82         char rc; 83         switch (c) 84         { 85             case ‘t‘: 86                 c = ‘\t‘; 87                 break; 88             case ‘n‘: 89                 c = ‘\n‘; 90                 break; 91             case ‘r‘: 92                 c = ‘\r‘; 93                 break; 94             case ‘\‘‘: 95                 c = ‘\‘‘; 96                 break; 97             case ‘0‘: 98                 c = ‘\0‘; 99                 break;100         }101         return c;102     }103 104     /// <summary>105     /// 字符串转对应汉字字符106     /// 只能处理如"8d34"之类的数字字符为对应的汉字107     /// 例子："9648" 转为 ‘陈‘108     /// </summary>109     /// <param name="content">转换的字符串</param>110     /// <returns>对应的汉字</returns>111     public static char HexStringToChar(string content)112     {113         int num = Convert.ToInt32(content, 16);114         return (char)num;115     }116 117     /// <summary>118     /// 把string转为UTF8String类型119     /// </summary>120     /// <param name="content"></param>121     /// <returns></returns>122     public static UTF8String ValueOf(string content)123     {124         string reString = null;125         char[] ac = content.ToCharArray();126         int num;127         foreach (char c in ac)128         {129             num = (int)c;130             string n = num.ToString("X2");131             if (n.Length == 4)132                 reString += "\\u" + n;133             else134                 reString += c;135         }136         return new UTF8String(reString);137     }138 139 }