Unicode编码与中文的转换

public String decodeUnicode(String src) {

       char[] in = src.toCharArray();

       char aChar;

       char[] out = new char[src.length()];

       int outLen = 0;

       int off = 0;

       int end = src.length();

       while (off < end) {

           aChar = in[off++];

           if (aChar == ‘\\‘) {

              aChar = in[off++];

              if (aChar == ‘u‘) {

                  int value = 0;

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

                     aChar = in[off++];

                     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.");

                     }

                  }

                  out[outLen++] = (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‘;

                  }

                  out[outLen++] = aChar;

              }

           } else {

              out[outLen++] = (char) aChar;

           }

       }

       return new String(out, 0, outLen);

    }

public String encodeUnicode(String str) {

       int iValue = 0;

       String uStr = "";

       for (int i = 0; i < str.length(); i++) {

           iValue = (int) str.charAt(i);

           if (iValue <= 256) {

              uStr += str.charAt(i);

           } else {

              uStr += "\\u" + Integer.toHexString(iValue);

           }

       }

       return uStr;

    }

public String encoding(String srcStr){

       String desStr = "";

       try {

           desStr = URLEncoder.encode(srcStr, "UTF-8");

       } catch (UnsupportedEncodingException e) {

           e.printStackTrace();

       }

       return desStr;

    }

public String decoding(String srcStr){

       String desStr = "";

       try {

           desStr = URLDecoder.decode(srcStr, "UTF-8");

       } catch (UnsupportedEncodingException e) {

           e.printStackTrace();

       }

       return desStr;

    }