Md5，base64加密_md5(base64)

MD5的加密是不可逆的，而base64的加密是可逆的，下面看下具体的实现

import com.sun.org.apache.xerces.internal.impl.dv.util.HexBin;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
 
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
 
public class TestDemo01 {
    public static void main(String[] args) throws IOException, NoSuchAlgorithmException {
       // base64("helloword");
        md5("helloword");
    }
    //base64加密
    public static  void base64(String s) throws IOException {
        //建立BASE64Encoder对象
        BASE64Encoder encoder=new BASE64Encoder();
        //进行加密
        String encode =encoder.encode(s.getBytes());
        System.out.println("加密后:"+encode);
        //解密
        BASE64Decoder decoder =new BASE64Decoder();
        String decode = new String(decoder.decodeBuffer(encode));
        System.out.println("解密后:"+decode);
    }
    //Md5加密,md5加密是不可逆的
    public static  void md5(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException {
        byte[] digest = null;
        MessageDigest md5 = MessageDigest.getInstance("md5");
        digest  = md5.digest(str.getBytes("utf-8"));
        //16是表示转换为16进制数
        String md5Str = new BigInteger(1, digest).toString(16);
        System.out.println(md5Str);
    }
}