md5utils.java

《j2ee开发全程实录》随书源码

package com.cownew.ctk.security;

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

import com.cownew.ctk.common.ExceptionUtils;
import com.cownew.ctk.common.StringUtils;


public class MD5Utils
{

	public static String digest(String strSrc)
	{
		byte[] btKey = new byte[strSrc.getBytes().length + 1];
		System.arraycopy(strSrc.getBytes(), 0, btKey, 0,
				strSrc.getBytes().length);
		MessageDigest md;
		try
		{
			md = MessageDigest.getInstance("MD5");
		} catch (NoSuchAlgorithmException e)
		{
			throw ExceptionUtils.toRuntimeException(e);
		}
		md.update(btKey);
		byte[] btDigest = md.digest();
		return StringUtils.byteArrayToString(btDigest);
	}
}