Java实现的utf8，gbk，unicode编码相互转换的代码，utf8unicode,public class

Java实现的utf8，gbk，unicode编码相互转换的代码，utf8unicode,public class

public class UTF2GBK {    public String gbk2utf8(String gbk) {        String l_temp = GBK2Unicode(gbk);        l_temp = unicodeToUtf8(l_temp);        return l_temp;    }    public String utf82gbk(String utf) {        String l_temp = utf8ToUnicode(utf);        l_temp = Unicode2GBK(l_temp);        return l_temp;    }    /**     *      * @param str     * @return String     */    public static String GBK2Unicode(String str) {        StringBuffer result = new StringBuffer();        for (int i = 0; i < str.length(); i++) {            char chr1 = (char) str.charAt(i);            if (!isNeedConvert(chr1)) {                result.append(chr1);                continue;            }            result.append("\\u" + Integer.toHexString((int) chr1));        }        return result.toString();    }    /**     *      * @param dataStr     * @return String     */    public static String Unicode2GBK(String dataStr) {        int index = 0;        StringBuffer buffer = new StringBuffer();        int li_len = dataStr.length();        while (index < li_len) {            if (index >= li_len - 1                    || !"\\u".equals(dataStr.substring(index, index + 2))) {                buffer.append(dataStr.charAt(index));                index++;                continue;            }            String charStr = "";            charStr = dataStr.substring(index + 2, index + 6);            char letter = (char) Integer.parseInt(charStr, 16);            buffer.append(letter);            index += 6;        }        return buffer.toString();    }    public static boolean isNeedConvert(char para) {        return ((para & (0x00FF)) != para);    }    /**     * utf-8 转unicode     *      * @param inStr     * @return String     */    public static String utf8ToUnicode(String inStr) {        char[] myBuffer = inStr.toCharArray();        StringBuffer sb = new StringBuffer();        for (int i = 0; i < inStr.length(); i++) {            UnicodeBlock ub = UnicodeBlock.of(myBuffer[i]);            if (ub == UnicodeBlock.BASIC_LATIN) {                sb.append(myBuffer[i]);            } else if (ub == UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {                int j = (int) myBuffer[i] - 65248;                sb.append((char) j);            } else {                short s = (short) myBuffer[i];                String hexS = Integer.toHexString(s);                String unicode = "\\u" + hexS;                sb.append(unicode.toLowerCase());            }        }        return sb.toString();    }    /**     *      * @param theString     * @return String     */    public static String unicodeToUtf8(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();    }}