Java MD5 String md5(String string)

Description

Use md5 method to encryption

License

Open Source License

Parameter

Parameter	Description
string	input string

Declaration

private static String md5(String string) 

Method Source Code

//package com.java2s;
/**/*w w w.  j a va 2  s . c  o  m*/
 * Copyright 2017 Institute of Computing Technology, Chinese Academy of Sciences.
 * Licensed under the terms of the Apache 2.0 license.
 * Please see LICENSE file in the project root for terms
 */

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

public class Main {
    /**
     * Use md5 method to encryption
     * @param string input string
     */
    private static String md5(String string) {
        MessageDigest md = null;
        try {
            md = MessageDigest.getInstance("md5");
            md.update(string.getBytes());
            byte[] md5Bytes = md.digest();
            return bytes2Hex(md5Bytes);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * Convert byteArray to String
     * @param byteArray
     * @return string of input byteArray
     */
    private static String bytes2Hex(byte[] byteArray) {
        StringBuffer strBuf = new StringBuffer();
        for (int i = 0; i < byteArray.length; i++) {
            if (byteArray[i] >= 0 && byteArray[i] < 16) {
                strBuf.append("0");
            }
            strBuf.append(Integer.toHexString(byteArray[i] & 0xFF));
        }
        return strBuf.toString();
    }
}

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