xjc -d src -p com.example.generated MySchema.xsd JAXBContext context = JAXBContext.newInstance(com.example.generated.MyClass.class); Marshaller marshaller = context.createMarshaller(); Unmarshaller unmarshaller = context.createUnmarshaller(); MyClass obj = new MyClass(); obj.setAge(20); marshaller.marshal(obj, new File("output.xml")); MyClass newObj = (MyClass) unmarshaller.unmarshal(new File("input.xml"));