aes java encrypt

AES.java

class AES {

    public static void main(String[] args) throws NoSuchPaddingException, BadPaddingException, NoSuchAlgorithmException, IllegalBlockSizeException, IOException, InvalidKeyException, Base64DecodingException, InvalidAlgorithmParameterException {
        String content = "this is a test";
        String password = "1234567812345678";
        System.out.println("before:" + content);

        // encrypt
        String encrypt = encode(content, "1234567812345678", password);
        System.out.println("encrypt:" + encrypt);

        // decrypt
        String decrypt = decode(encrypt, "1234567812345678", password);
        System.out.println("decrypt:" + decrypt);
    }

    public static final String decode(String content, String initVector, String password) throws NoSuchAlgorithmException, IOException, NoSuchPaddingException, InvalidKeyException, Base64DecodingException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
        IvParameterSpec iv = new IvParameterSpec(initVector.getBytes());
        SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes(), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
        byte[] encrypted = new BASE64Decoder().decodeBuffer(content);
        byte[] original = cipher.doFinal(encrypted);
        return new String(original);
    }

    public static final String encode(String content, String initVector, String password) throws NoSuchAlgorithmException, UnsupportedEncodingException, NoSuchPaddingException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");

        int blockSize = cipher.getBlockSize();
        byte[] bytes = content.getBytes();
        int plainTextLength = bytes.length;
        if (plainTextLength % blockSize != 0) {
            plainTextLength = plainTextLength + (blockSize - (plainTextLength % blockSize));
        }
        byte[] plainText = new byte[plainTextLength];
        System.arraycopy(bytes, 0, plainText, 0, bytes.length);

        SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes(), "AES");
        IvParameterSpec iv = new IvParameterSpec(initVector.getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
        byte[] encrypted = cipher.doFinal(plainText);
        return new BASE64Encoder().encode(encrypted);
    }
}