import java.security.Key;

import javax.crypto.Cipher;

import javax.crypto.KeyGenerator;

import javax.crypto.SecretKey;

import javax.crypto.SecretKeyFactory;

import javax.crypto.spec.DESKeySpec;

import org.apache.commons.codec.binary.Hex;

public class ImoocDes {

public static void main (String [] args) {

ImoocDes imoocDes = new ImoocDes();

imoocDes.jdkDes("imooc security des");

}

public void jdkDes(String password) {

try {

//生成key

KeyGenerator keyGenerator = KeyGenerator.getInstance("DES");

SecretKey secretKey = keyGenerator.generateKey();

byte [] bytKey = secretKey.getEncoded();

//key轉(zhuǎn)換

DESKeySpec dESKeySpec = new DESKeySpec(bytKey);?

SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("DES");//參數(shù)指定加密方式

Key secretKey1 = secretKeyFactory.generateSecret(dESKeySpec);

//加密

Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");

cipher.init(Cipher.ENCRYPT_MODE, secretKey1);

byte[] result = cipher.doFinal(password.getBytes());

System.out.println("jdk:" + Hex.encodeHexString(result));

//解密

cipher.init(Cipher.ENCRYPT_MODE, secretKey1);

result = cipher.doFinal(result);

System.out.println("jdk:" + new String(result));

} catch (Exception e) {

e.printStackTrace();

}

}

}

上面的代碼都是按照老師的代碼寫的遇到了兩個(gè)問題請大家?guī)兔獯鹨幌?

問題1多次運(yùn)行時(shí)加密的結(jié)果不一樣這樣正常嗎

問題2解密的時(shí)候?yàn)槭裁唇饷芙Y(jié)果一直是亂碼

兩次運(yùn)行結(jié)果如下

第一次運(yùn)行

jdk:b2f7b3a368cc58fb16e9c3fc3980c9da08cd09670b05e47d

jdk:>|V'bC( mA4?p ?d

第二次運(yùn)行

jdk:ac91a46c660ce3170281f64dc17489756ad8e15169fda33d

jdk:C 03H