DES加解密过程

package com.pff.pff;

import java.security.SecureRandom;

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 Des {

    private static String test = "pff";

    public static void main(String[] args) {
        testDes();
    }

    public static void testDes() {
        try {
            // 生成秘钥
            KeyGenerator keyGenerator = KeyGenerator.getInstance("DES");
            keyGenerator.init(new SecureRandom());
            SecretKey generateKey = keyGenerator.generateKey();
            byte[] encoded = generateKey.getEncoded();
            // 秘钥转换
            DESKeySpec desKeySpec = new DESKeySpec(encoded);
            SecretKeyFactory instance = SecretKeyFactory.getInstance("DES");
            SecretKey generateSecret = instance.generateSecret(desKeySpec);
            // DES加密过程
            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5padding");
            cipher.init(Cipher.ENCRYPT_MODE, generateSecret);
            byte[] result = cipher.doFinal(test.getBytes());
            System.out.println("DES加密过程结果= " + Hex.encodeHexString(result));
            // 解密过程
            cipher.init(Cipher.DECRYPT_MODE, generateSecret);
            byte[] result2 = cipher.doFinal(result);
            System.out.println("DES解密过程结果= " + new String(result2));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}