MD5.java

package com.bigdo.util;

import java.math.BigInteger;
import java.security.MessageDigest;

public final class MD5 {
	public static String encode(String input) {
		String result = input;
		try {
			if (input != null) {
				// or "SHA-1"
				MessageDigest md = MessageDigest.getInstance("MD5");
				md.update(input.getBytes());
				BigInteger hash = new BigInteger(1, md.digest());
				result = hash.toString(16);
				while (result.length() < 32) {
					result = "0" + result;
				}
			}
		} catch (Exception e) {
		}
		return result;
	}
}