mdutil.java

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package org.whatisjava.dang.util;

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

import sun.misc.BASE64Encoder;

public class MDUtil {
	public static String md5(String s){
		try {
			MessageDigest md=MessageDigest.getInstance("MD5");
			byte[] b=md.digest(s.getBytes());
			BASE64Encoder encoder=new BASE64Encoder();
			return encoder.encode(b);
		} catch (NoSuchAlgorithmException e) {
			return null;
		}
	}
	public static String digest(String s){
		try {
			MessageDigest md=MessageDigest.getInstance("MD5");
			byte[] b=md.digest(s.getBytes());
			md=MessageDigest.getInstance("SHA");
			b=md.digest(b);
			BASE64Encoder encoder=new BASE64Encoder();
			return encoder.encode(b);
		} catch (NoSuchAlgorithmException e) {
			return null;
		}
	}
	public static void main(String[] s){
		try {
			s[0]=md5(s[0]);
			MessageDigest md=MessageDigest.getInstance("SHA");
			byte[] b=md.digest(s[0].getBytes());
			BASE64Encoder encoder=new BASE64Encoder();
			System.out.println(encoder.encode(b));
		} catch (NoSuchAlgorithmException e) {
			return;
		}
		System.out.println(digest(s[0]));
	}
}