1.新建Md5.java
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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; }} |
2.新建测试类
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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==")); }} |
运行结果：
