JAVA中使用MD5加密实现密码加密

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：