How to add "@" prefix to attribute of xml tag when converting to json?

Question

Java

There is a code that receives an xml stream, translates it into json and returns a json string

public static String xmlToJson(InputStream inputStream) {
        try {
            InputFactoryImpl inputFactory = new InputFactoryImpl();
            inputFactory.setProperty(XMLInputFactory.IS_NAMESPACE_AWARE, Boolean.FALSE);

            OutputFactoryImpl outputFactory = new OutputFactoryImpl();
            outputFactory.setProperty(XMLStreamProperties.XSP_NAMESPACE_AWARE, Boolean.FALSE);

            XmlMapper xmlMapper = new XmlMapper(new XmlFactory(inputFactory,outputFactory), new JacksonXmlModule());
            xmlMapper.enable(SerializationFeature.INDENT_OUTPUT);

            JsonNode node = xmlMapper.readTree(inputStream);
            ObjectMapper jsonMapper = new ObjectMapper();
            return jsonMapper.writeValueAsString(node);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "";
    }

The problem is that when a tag in xml has an attribute (testAttr),


then the final json looks like this, which is not very convenient. I would like to add the @ prefix to the attribute to get @testAttr. I saw this possibility in many online xml -> json converters, but I don’t know how to do it using jackson .. And yes, xml will come in the form of a stream, so the option using any annotations from jackson is not suitable