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：