public class AESUtil {    public static void main(String[] args){        jdkAES("12345623423432423S");    }    public static void jdkAES(String str){        try {        SecureRandom random = new SecureRandom();        byte[] salt = random.generateSeed(8);        PBEKeySpec pkey=new PBEKeySpec(str.toCharArray());            SecretKeyFactory factory = SecretKeyFactory.getInstance("PBEWITHMD5andDES");            Key key = factory.generateSecret(pkey);            Key key2 = factory.generateSecret(pkey);                    System.out.println("KEY:"+key.serialVersionUID);            System.out.println("KEY2:"+key2.serialVersionUID);                PBEParameterSpec pbets = new PBEParameterSpec(salt,100);        Cipher c = Cipher.getInstance("PBEWITHMD5andDES");        c.init(Cipher.ENCRYPT_MODE, key,pbets);        byte[] result = c.doFinal(str.getBytes());        System.out.println(Base64.encodeBase64String(result));                        c.init(Cipher.DECRYPT_MODE, key,pbets);        result = c.doFinal(result);        System.out.println(new String(result));                                } catch (Exception e) {            e.printStackTrace();        }    }    }