import java.util.Arrays;        import javax.crypto.Cipher;    import javax.crypto.SecretKey;    import javax.crypto.SecretKeyFactory;    import javax.crypto.spec.PBEKeySpec;    import javax.crypto.spec.PBEParameterSpec;        /**    * PBE算法 对称加密 password-based encryption    * @author stone    * @date 2014-03-10 23:41:35    */    public class PBE {        static final String KEY_ALGORITHM = "PBEWithMD5AndDES";    //  static byte[] salt = "xiaoyang".getBytes(); // 盐：Salt must be 8 bytes long        static byte[] salt = "哈皮aa".getBytes(); // 盐：Salt must be 8 bytes long  哈皮，在utf8中是6个字节        static int iterationCount = 888; //循环次数        static Cipher cipher;                public static void main(String[] args) throws Exception {            byte[] encrypt = encrypt("中华人民admin*&(*S&6");            System.out.println("PBE加密后：" + Arrays.toString(encrypt));                        System.out.println("PBE解密后：" + decrypt(encrypt));        }                /**        * 使用PBE 算法 加密        * @return  加密后的字符数组        * @throws Exception        */        static byte[] encrypt(String str) throws Exception {            cipher = Cipher.getInstance(KEY_ALGORITHM);                        //使用SecretKeyFactory 生成key            SecretKeyFactory factory = SecretKeyFactory.getInstance(KEY_ALGORITHM);            PBEKeySpec keySpec = new PBEKeySpec("shizongyin".toCharArray());            SecretKey key = factory.generateSecret(keySpec);            System.out.println("key:" + Arrays.toString(key.getEncoded()));                        cipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(salt, iterationCount));//使用加密模式初始化 密钥            return cipher.doFinal(str.getBytes()); //按单部分操作加密或解密数据，或者结束一个多部分操作。        }                /**        *         * @param encrypt        * @return        * @throws Exception        */        static String decrypt(byte[] encrypt) throws Exception {            cipher = Cipher.getInstance(KEY_ALGORITHM);                        //使用SecretKeyFactory 生成key            SecretKeyFactory factory = SecretKeyFactory.getInstance(KEY_ALGORITHM);            PBEKeySpec keySpec = new PBEKeySpec("shizongyin".toCharArray());            SecretKey key = factory.generateSecret(keySpec);            System.out.println("key:" + Arrays.toString(key.getEncoded()));                        cipher.init(Cipher.DECRYPT_MODE, key, new PBEParameterSpec(salt, iterationCount));//使用加密模式初始化 密钥            byte[] result = cipher.doFinal(encrypt); //按单部分操作加密或解密数据，或者结束一个多部分操作。                        return new String(result);        }            }