java中unicode和中文相互转换的简单实现

如下所示：

package test.com.gjob.services;
  import java.util.Properties;
   public class Test {
      public static void main(String[] args) {
      String s = "简介";
      String tt = gbEncoding(s);
  //    String tt1 = "你好，我想给你说一个事情";
      System.out.println(decodeUnicode("\\u7b80\\u4ecb"));
  //    System.out.println(decodeUnicode(tt1));
      System.out.println(HTMLDecoder.decode("中国"));
      String s1 = "\u7b80\u4ecb";
      System.out.println(s.indexOf("\\"));
     }
     public static String gbEncoding(final String gbString) {
     char[] utfBytes = gbString.toCharArray();
        String unicodeBytes = "";
        for (int byteIndex = 0; byteIndex < utfBytes.length; byteIndex++) {
           String hexB = Integer.toHexString(utfBytes[byteIndex]);
            if (hexB.length() <= 2) {
              hexB = "00" + hexB;
           }
            unicodeBytes = unicodeBytes + "\\u" + hexB;
          }
          System.out.println("unicodeBytes is: " + unicodeBytes);
          return unicodeBytes;
       } 

       public static String decodeUnicode(final String dataStr) {
        int start = 0;
         int end = 0;
         final StringBuffer buffer = new StringBuffer();
         while (start > -1) {
           end = dataStr.indexOf("\\u", start + 2);
           String charStr = "";
           if (end == -1) {
             charStr = dataStr.substring(start + 2, dataStr.length());
           } else {
             charStr = dataStr.substring(start + 2, end);
           }
           char letter = (char) Integer.parseInt(charStr, 16); // 16进制parse整形字符串。
          buffer.append(new Character(letter).toString());
          start = end;
         }
         return buffer.toString();
       }
     }

public static String decodeUnicode(String theString) {  

   char aChar;  

   int len = theString.length();  

   StringBuffer outBuffer = new StringBuffer(len);  

   for (int x = 0; x < len;) {  

   aChar = theString.charAt(x++);  

   if (aChar == '\\') {  

    aChar = theString.charAt(x++);  

    if (aChar == 'u') {  

    // Read the xxxx  

    int value = 0;  

    for (int i = 0; i < 4; i++) {  

     aChar = theString.charAt(x++);  

     switch (aChar) {  

     case '0':  

     case '1':  

     case '2':  

     case '3':  

    case '4':  

     case '5':  

     case '6':
      case '7':
      case '8':
      case '9':
      value = (value << 4) + aChar - '0';
      break;
      case 'a':
      case 'b':
      case 'c':
      case 'd':
      case 'e':
      case 'f':
      value = (value << 4) + 10 + aChar - 'a';
      break;
      case 'A':
      case 'B':
      case 'C':
      case 'D':
      case 'E':
      case 'F':
      value = (value << 4) + 10 + aChar - 'A';
      break;
      default:
      throw new IllegalArgumentException(
       "Malformed  \\uxxxx  encoding.");
      }  

     }
     outBuffer.append((char) value);
     } else {
     if (aChar == 't')
      aChar = '\t';
     else if (aChar == 'r')
      aChar = '\r';  

     else if (aChar == 'n')  

      aChar = '\n';  

     else if (aChar == 'f')  

      aChar = '\f';  

     outBuffer.append(aChar);  

     }  

    } else  

    outBuffer.append(aChar);  

    }  

    return outBuffer.toString();  

   }

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