Marshalling and Unmarshalling by the JAXB

JAXB로 마샬링과 언마샬링 하려면 JAXB 클래스가 있어야 함

JAXB 클래스는 .xsd라고 XML 스키마가 정의된 파일을 xjc 툴로 자동 생성함

(.xsd 파일은 어디선가 받겠죠~!)

.xsd가 있는 경로에서 "xjc -d . *"를 실행하면 JAXB 클래스가 생성됨, 좀더 디테일한 설정은 Help 참조

(xjc -d . * -p com.company.sub)

마샤링과 언마샬링은 아래 소스 코드 참고

public class JaxbConvertor { private static JaxbConvertor mSingleton = null; private JAXBContext mJAXBContext = null; private JaxbConvertor() throws JAXBException { mJAXBContext = JAXBContext.newInstance( JAXB1.class, JAXB2.class,                                 ... // xjc 툴로 생성한 JAXB 클래스 입력 1..N 개  ); // JAXBContext 생성 작업은 비용이 크기 때문에 싱글턴 패턴 적용 } public static JaxbConvertor getInstance() throws JAXBException { if (mSingleton == null) mSingleton = new JaxbConvertor(); return mSingleton; } public void objectToStream(Object object, OutputStream outputStream) throws JAXBException { Marshaller marshaller = mJAXBContext.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); marshaller.marshal(object, outputStream); } public Object streamToObject(InputStream inputStream) throws JAXBException { Unmarshaller unmarshaller = mJAXBContext.createUnmarshaller(); return unmarshaller.unmarshal(inputStream); } public String objectToString(Object object) throws JAXBException { StringWriter stringWriter = new StringWriter(); Marshaller marshaller = mJAXBContext.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); marshaller.marshal(object, stringWriter); return stringWriter.toString(); } public Object stringToObject(String string) throws XMLStreamException, FactoryConfigurationError, JAXBException { XMLStreamReader reader = XMLInputFactory.newInstance().createXMLStreamReader(new StringReader(string)); Unmarshaller unmarshaller = mJAXBContext.createUnmarshaller(); return unmarshaller.unmarshal(reader); } public Document objectToDom(Object object) throws ParserConfigurationException, JAXBException { DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder dBuilder = dbFactory.newDocumentBuilder(); Document doc = dBuilder.newDocument(); Marshaller marshaller = mJAXBContext.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); marshaller.marshal(object, doc); return doc; } }

추가로 생성한 XML 데이터 검증 방법은 아래와 같음

스키마를 만족하지 않는 경우 Exception 발생

public class JaxbValidator { public static boolean validate(String xsdFilePath, String xmlFilePath) { try {             SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);             Schema schema = factory.newSchema(new File(xsdFilePath));             Validator validator = schema.newValidator();             validator.validate(new StreamSource(new File(xmlFilePath)));         } catch (IOException | SAXException e) {             System.out.println("Exception: "+e.getMessage());             return false;         }         return true; } }