java Unicode 转为中文

http://my.oschina.net/friendship/blog/485542

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();
  }