Java tutorial
//package com.java2s; //License from project: Open Source License import java.security.MessageDigest; public class Main { public static String MD5(String md5) { if (md5 == null) { return null; } try { MessageDigest md = MessageDigest.getInstance("MD5"); byte[] array = md.digest(md5.getBytes()); StringBuilder sb = new StringBuilder(); for (int a = 0; a < array.length; a++) { sb.append(Integer.toHexString((array[a] & 0xFF) | 0x100).substring(1, 3)); } return sb.toString(); } catch (java.security.NoSuchAlgorithmException e) { e.printStackTrace(); } return null; } }