md5.java

j2ee工程项目

package com.webalbum2.bean;

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

public class md5 
{
    public md5()
    {
    }

    public static final String getmd5(String s)
    {
        char hexDigits[] = {
            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 
            'a', 'b', 'c', 'd', 'e', 'f'
        };
        char str[];
        byte strTemp[] = s.getBytes();
        MessageDigest mdTemp = null;
		try {
			mdTemp = MessageDigest.getInstance("MD5");
	        mdTemp.update(strTemp);
	        
		} catch (NoSuchAlgorithmException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		byte md[] = mdTemp.digest();
        int j = md.length;
        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);
    }
}