java 11 已移除 javax.xml.bind

    @SneakyThrows

    public static <T> String convertToXml(T obj) {

        require(obj);

        JAXBContext jaxbContext = JAXBContext.newInstance(obj.getClass());

        Marshaller marshaller = jaxbContext.createMarshaller();

        //marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); // pretty

        //marshaller.setProperty(Marshaller.JAXB_ENCODING, "ISO-8859-1"); // specify encoding

        ByteArrayOutputStream stream = new ByteArrayOutputStream();

        marshaller.marshal(obj, stream);

        return stream.toString(Contract.Utf8);

    }

    @SneakyThrows

    public static <T> T convertFromXml(String xml, Class<T> type) {

        require(xml, type);

        JAXBContext jaxbContext = JAXBContext.newInstance(type);

        Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();

        byte[] data = xml.getBytes(Contract.Utf8);

        ByteArrayInputStream stream = new ByteArrayInputStream(data);

        return (T) unmarshaller.unmarshal(stream);

    }