Java MD5 String md5String(String s)

Description

md String

License

Open Source License

Declaration

public static String md5String(String s) 

Method Source Code

//package com.java2s;
/*//from ww w .j  av a 2 s  . com
 The MIT License (MIT)
    
 Copyright (c) 2014 Cr0s
    
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
    
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
    
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */

import java.io.UnsupportedEncodingException;

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

public class Main {
    public static String md5String(String s) {
        byte messageDigest[] = md5Bytes(s);

        if (messageDigest == null) {
            return "";
        }

        return hashToString(messageDigest);
    }

    public static byte[] md5Bytes(String s) {
        if (s == null) {
            return null;
        }

        MessageDigest md5;

        try {
            md5 = MessageDigest.getInstance("md5");

            md5.reset();
            md5.update(s.getBytes("UTF-8"), 0, s.length());

            return md5.digest();
        } catch (UnsupportedEncodingException | NoSuchAlgorithmException ex) {
            ex.printStackTrace();

            return null;
        }
    }

    public static String hashToString(byte[] digest) {
        StringBuilder hexString = new StringBuilder();

        for (int i = 0; i < digest.length; i++) {
            hexString.append(Integer.toString((digest[i] & 0xff) + 0x100, 16).substring(1));
        }

        return hexString.toString();
    }
}

Related

1. md5Signature(TreeMap params, String secret)
2. md5String(String input)
3. md5String(String key)
4. md5String(String paramString)
5. md5String(String s)
6. MD5String(String str)
7. MD5StringToL32(String md5Str)
8. MD5ToInt(String s)
9. md5Util(String password)