encode string to Lowercase Md5 - Java Security

Java examples for Security:MD5

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Description

encode string to Lowercase Md5

Demo Code


//package com.java2s;
import java.security.MessageDigest;

public class Main {
    public static void main(String[] argv) {
        String str = "java2s.com";
        System.out.println(encode16LowercaseMd5(str));
    }/* ww  w .ja v a  2s  . c  o  m*/

    public static String encode16LowercaseMd5(String str) {
        return encode32LowercaseMd5(str).substring(8, 24);
    }

    public static String encode32LowercaseMd5(String str) {
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }

        char[] charArray = str.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++) {
            byteArray[i] = (byte) charArray[i];
        }
        byte[] md5Bytes = md5.digest(byteArray);

        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16) {
                hexValue.append("0");
            }
            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();
    }
}

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