Java MD5 String md5Hex(String message)

Description

Calculate the MD5 hash of message and return a hex encoded representation of it.

License

Apache License

Parameter

Parameter	Description
message	The string to hash and hex encode.

Return

Hex encoded MD5 hash of message

Declaration

static String md5Hex(String message) 

Method Source Code

//package com.java2s;
/*//from w  w w  .j  a  v a  2s  .  c  o m
 * Copyright 2010 asaph.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.UnsupportedEncodingException;

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

public class Main {
    /**
     * Calculate the MD5 hash of <code>message</code> and return a hex encoded representation of it.
     * 
     * @param message The string to hash and hex encode.
     * @return Hex encoded MD5 hash of <code>message</code>
     */
    static String md5Hex(String message) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            return hex(md.digest(message.getBytes("UTF8")));
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e); // this should never ever happen
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e); // this should never ever happen
        }
    }

    /**
     * Convert a byte array to a hex encoded string.
     * 
     * @param bytes The byte array to encode as hex.
     * @return A hex encoded representation of <code>bytes</code>.
     */
    static String hex(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        for (byte b : bytes) {
            String hexNumber = Integer.toHexString(b & 0xFF);
            if (hexNumber.length() < 2) {
                sb.append('0');
            }
            sb.append(hexNumber);
        }
        return sb.toString();
    }
}

Related

1. md5FromFile(File file)
2. md5fromFile(String path)
3. md5Hex(String data)
4. md5Hex(String data)
5. md5Hex(String message)
6. md5Hex(String message)
7. md5Hex(String message)
8. md5Hex(String message)
9. md5Hex(String s)