java中unicode和中文相互转换

 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();    

      }