java中MD5加密的小使用

package com.wxgs.ch01;

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

import sun.misc.BASE64Encoder;

public class TestMD {
    public static void main(String[] args) {
        String oldpwd=md5Add("123456");
        String newpwd=md5Add("123456");
        if(newpwd.equals(oldpwd)){
            System.out.println("ture");
        }else{
            System.out.println("false");
        }
    }
    static String md5Add(String str){
        String newStr;
        try {
            MessageDigest md5=MessageDigest.getInstance("MD5");
            BASE64Encoder base64Encoder=new BASE64Encoder();
            //加密字符串
            newStr=base64Encoder.encode(md5.digest(str.getBytes()));
            
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            newStr="fasle";
        }
        return newStr;
        
    }
}