Person person = new Person(); person.setName("John"); person.setAge(30); ObjectMapper objectMapper = new ObjectMapper(); String json = objectMapper.writeValueAsString(person); System.out.println(json); String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><person><name>John</name><age>30</age></person>"; JAXBContext jaxbContext = JAXBContext.newInstance(Person.class); Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); Person person = (Person) unmarshaller.unmarshal(new StringReader(xml)); System.out.println(person.getName()); System.out.println(person.getAge());