md5encrypt.java.svn-base

学习dwr+struts2+spring进行开发的好例子

package com.szhelper.lotteryWeb.util;

import java.security.*;

import java.security.spec.*;

public class Md5Encrypt {

	public final static String encode(String s) {
		char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
				'a', 'b', 'c', 'd', 'e', 'f' };
		try {
			byte[] strTemp = s.getBytes();
			MessageDigest mdTemp = MessageDigest.getInstance("MD5");
			mdTemp.update(strTemp);
			byte[] md = mdTemp.digest();
			int j = md.length;
			char str[] = new char[j * 2];
			int k = 0;
			for (int i = 0; i < j; i++) {
				byte byte0 = md[i];
				str[k++] = hexDigits[byte0 >>> 4 & 0xf];
				str[k++] = hexDigits[byte0 & 0xf];
			}
			return new String(str);
		} catch (Exception e) {

			return null;

		}
	}

	public static void main(String[] args) {
		System.out.print(encode("admin"));
	}
}