JAVA中使用MD5加密实现密码加密

package com.loger.md5;import java.io.UnsupportedEncodingException;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import sun.misc.BASE64Encoder;public class Md5 {   /**利用MD5进行加密*/  public String EncoderByMd5(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException{    //确定计算方法    MessageDigest md5=MessageDigest.getInstance("MD5");    BASE64Encoder base64en = new BASE64Encoder();    //加密后的字符串    String newstr=base64en.encode(md5.digest(str.getBytes("utf-8")));    return newstr;  }    /**判断用户密码是否正确   *newpasswd 用户输入的密码   *oldpasswd 正确密码*/  public boolean checkpassword(String newpasswd,String oldpasswd) throws NoSuchAlgorithmException, UnsupportedEncodingException{    if(EncoderByMd5(newpasswd).equals(oldpasswd))      return true;    else      return false;  }}

package com.loger.md5;import java.io.UnsupportedEncodingException;import java.security.NoSuchAlgorithmException;public class MyTest {    public static void main(String[] args) throws NoSuchAlgorithmException, UnsupportedEncodingException {        Md5 md5 = new Md5();      String str = "apple";    try {      String newString = md5.EncoderByMd5(str);      System.out.println(newString);    } catch (NoSuchAlgorithmException e) {      // TODO Auto-generated catch block      e.printStackTrace();    } catch (UnsupportedEncodingException e) {      // TODO Auto-generated catch block      e.printStackTrace();    }        System.out.println(md5.EncoderByMd5("apple").equals("HzhwvidPbEmz4xoMZyiVfw=="));      }}