java sha-512 encryption

sha512.java

    /**
     * sha512 방식으로 암호화한 스트링을 리턴한다
     *
     * @param target
     * @return [encrypted string]
     */
    public final static String encryptSHA512(String target) {
        try {
            MessageDigest sh = MessageDigest.getInstance("SHA-512");
            sh.update(target.getBytes());
            StringBuffer sb = new StringBuffer();
            for (byte b : sh.digest()) sb.append(String.format("%1$02x", 0xff & b));
            return sb.toString();
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }

이 주셔서 감사합니다! 내가 쓰고있는 프로그램에서 사용하기 위하여려고하고있다. (PS :이 나쁜 한국인 경우 미안 해요, 난 구글 번역 사용하고 있습니다)

Thats wrong. Correct implementation is:

private static String getHashCodeFromString(String str) throws NoSuchAlgorithmException {
    MessageDigest md = MessageDigest.getInstance("SHA-512);
    md.update(str.getBytes());
    byte byteData[] = md.digest();

    //convert the byte to hex format method 1
    StringBuffer hashCodeBuffer = new StringBuffer();
    for (int i = 0; i < byteData.length; i++) {
        hashCodeBuffer.append(Integer.toString((byteData[i] & 0xff) + 0x100, 16).substring(1));
    }
    return hashCodeBuffer.toString();
}

To check yourslef you can try

echo -n "key-string" | sha512sum | awk '{print $1}'

You missed a semi-colon boy

I agree with odizapc. Or you can replace this line:

for (byte b : sh.digest()) sb.append(Integer.toHexString(0xff & b));

with this:

for (byte b : sh.digest()) sb.append(String.format("%1$02x", 0xff & b));

After all, thanks to dsdstudio and everyone