Java MD5 String md5(String input)

Description

Create an MD5 Hash of an input String.

License

Open Source License

Parameter

Parameter	Description
input	String to Hash

Return

Hash (Hex-Encoded)

Declaration

public static String md5(String input) 

Method Source Code

//package com.java2s;
/*// w  w w.  ja v a  2  s.com
 * regain/Thumbnailer - A file search engine providing plenty of formats (Plugin)
 * Copyright (C) 2011  Come_IN Computerclubs (University of Siegen)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Contact: Come_IN-Team <come_in-team@listserv.uni-siegen.de>
 */

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

public class Main {
    /**
     * Create an MD5 Hash of an input String.
     * Uses the MD5 Algorithm of MessageDigest.
     * @param input   String to Hash
     * @return   Hash (Hex-Encoded)
     */
    public static String md5(String input) {
        StringBuilder res = new StringBuilder();
        try {
            MessageDigest algorithm = MessageDigest.getInstance("MD5");
            algorithm.reset();
            algorithm.update(input.getBytes());
            byte[] md5 = algorithm.digest();
            String tmp = "";
            for (int i = 0; i < md5.length; i++) {
                tmp = (Integer.toHexString(0xFF & md5[i]));
                if (tmp.length() == 1) {
                    res.append("0").append(tmp);
                } else {
                    res.append(tmp);
                }
            }
        } catch (NoSuchAlgorithmException ex) {
            return "";
        }
        return res.toString();
    }
}

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