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.BinaryDecoder;

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

public class DESDemo {

    public static final String src = "des test";

    public static void main(String[] args)

    {

        jdkDES();

        bcDES();

    }

    private static void bcDES() {

    }

    private static void jdkDES() {

        try{

            //生成KEY

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

            keyGenerator.init(56);

            System.out.println(keyGenerator.getAlgorithm());

            System.out.println(keyGenerator.getProvider());

            SecretKey secretKey = keyGenerator.generateKey();

            byte[] bytesKey = secretKey.getEncoded();

            System.out.println(secretKey.getAlgorithm());

            System.out.println(secretKey.getFormat());

            //通过KEY转换生成密钥

            DESKeySpec desKeySpec = new DESKeySpec(bytesKey);

            SecretKeyFactory factory = SecretKeyFactory.getInstance("DES");

            SecretKey convertedKey = factory.generateSecret(desKeySpec);

            //加密

            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");// 算法/工作方式/填充方式

            cipher.init(Cipher.ENCRYPT_MODE, convertedKey);

            byte[] result = cipher.doFinal("要加密的内容".getBytes());

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

            //解密

            cipher.init(Cipher.DECRYPT_MODE,convertedKey);

            result = cipher.doFinal(result);

//            System.out.println("jdk des decrypt:" + new String(result));  //jdk des decrypt:?????????? 直接输出会乱码

            System.out.println("jdk des decrypt:" + new String( result,"utf-8" ));  //jdk des decrypt:??????????  依旧乱码

        }

        catch(Exception e) {

            e.printStackTrace();

        }

    }

}

请问windows系统默认编码是gbk吗？