JAVA MD5 Encryption

packagecom.demo;importjava.security.MessageDigest;publicclassMD5Util {    privatestaticfinalString ALGORITHM = "MD5";    privatestaticfinalchar[] HEX_DIGITS = { ‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘,            ‘6‘, ‘7‘, ‘8‘, ‘9‘, ‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘};    /**     * encode string     *     * @param algorithm     * @param str     * @return String     */    publicstaticString encode(String algorithm, String str) {        if(str == null) {            returnnull;        }        try{            MessageDigest messageDigest = MessageDigest.getInstance(algorithm);            messageDigest.update(str.getBytes());            returngetFormattedText(messageDigest.digest());        } catch(Exception e) {            thrownewRuntimeException(e);        }    }    /**     * encode By MD5     *     * @param str     * @return String     */    publicstaticString getStringMD5String(String str) {        if(str == null) {            returnnull;        }        try{            MessageDigest messageDigest = MessageDigest.getInstance(ALGORITHM);            messageDigest.update(str.getBytes());            return getFormattedText(messageDigest.digest());        } catch(Exception e) {            thrownewRuntimeException(e);        }    }     /**     * Takes the raw bytes from the digest and formats them correct.     *     * @param bytes     *            the raw bytes from the digest.     * @return the formatted bytes.     */    privatestaticString getFormattedText(byte[] bytes) {        intlen = bytes.length;        StringBuilder buf = new StringBuilder(len * 2);        // 把密文转换成十六进制的字符串形式        for(intj = 0; j < len; j++) {                     buf.append(HEX_DIGITS[(bytes[j] >> 4) & 0x0f]);            buf.append(HEX_DIGITS[bytes[j] & 0x0f]);        }        returnbuf.toString();    }    publicstaticvoidmain(String[] args) {        System.out.println(MD5Util.getStringMD5String("123"));//      System.out.println("111111 MD5  :"//              + EncoderHandler.encode("MD5", "111111"));//      System.out.println("111111 SHA1 :"//              + EncoderHandler.encode("SHA1", "111111"));    }}

JAVA MD5 Encryption