Java tutorial
//package com.java2s; import java.util.UUID; public class Main { public static String md5UUID() { return md5(UUID()); } public static String md5UUID(String key) { return md5(UUID(key)); } public static String md5(String data) { return org.apache.commons.codec.digest.DigestUtils.md5Hex(data); } public static String UUID() { return UUID.randomUUID().toString(); } public static String UUID(String key) { return UUID.fromString(key).toString(); } }