private static byte[] iv = "0000000000000000".getBytes();


    public static String encrypt(String content, String key) throws Exception {
        byte[] input = content.getBytes("utf-8");

        MessageDigest md = MessageDigest.getInstance("SHA-256");
        byte[] thedigest = md.digest(key.getBytes("utf-8"));
        SecretKeySpec skc = new SecretKeySpec(thedigest, "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skc, new IvParameterSpec(iv));

        byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
        int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
        ctLength += cipher.doFinal(cipherText, ctLength);
        return DatatypeConverter.printHexBinary(cipherText);
    }