Java Hash Calculate getHash(String phrase, String algorithm)

Description

get Hash

License

Open Source License

Declaration

public static String getHash(String phrase, String algorithm) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {

    public static String getHash(String phrase, String algorithm) {
        return getHexString(getByteHash(phrase, algorithm));
    }/*from   w  ww.j  ava 2 s  .  c  om*/

    private static String getHexString(byte[] bytes) {
        StringBuilder s = new StringBuilder();
        for (byte aByte : bytes) {
            int higherPart = ((aByte >> 4) & 0xf) << 4;
            int lowerPart = aByte & 0xf;
            if (higherPart == 0) {
                s.append('0');
            }
            s.append(Integer.toHexString(higherPart | lowerPart));
        }
        return s.toString();
    }

    private static byte[] getByteHash(String phrase, String algorithm) {
        try {
            MessageDigest md = MessageDigest.getInstance(algorithm);
            md.update(phrase.getBytes());
            return md.digest();
        } catch (NoSuchAlgorithmException e) {
            return null;
        }
    }
}

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6. getHash(String s)
7. getHash(String str, String algorithm)
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9. getHash(String text)