package com.cl.util;

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

public class MD5Generator {
    public static String generateMD5(String input) {
        try {
            // Create MD5 Hash
            MessageDigest digest = MessageDigest.getInstance("MD5");
            digest.update(input.getBytes());
            byte messageDigest[] = digest.digest();
 
            // Create Hex String
            StringBuilder hexString = new StringBuilder();
            for (byte aMessageDigest : messageDigest) {
                String h = Integer.toHexString(0xFF & aMessageDigest);
                while (h.length() < 2) h = "0" + h;
                hexString.append(h);
            }
            return hexString.toString();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }
 
    public static void main(String[] args) {
        System.out.println(generateMD5("123456"));
        System.out.println("17912345678".substring(0, 3) + "****" + "17912345678".substring(7));
        String myString = "358736";
        System.err.println("MD5 of '" + myString + "' is: " + generateMD5(myString));
    }
}