Java Interview questions: -Will you explain marshaling & unmarshalling in Java?

This is the most practical oriented Java Interview Questions which may be asked during the Interview by the Interviewer.

Marshalling:

Marshalling creates an XML document from a content tree

To marshal a content tree

• Create a JAXBContext object
• Create a Marshaller object (Marshaller marshaller = jaxbContext.createMarshaller();)
• Set required properties using setProperty method of Marshaller marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, new Boolean(true));
• Call the marshal method marshaller.marshal(collection, new FileOutputStream("jaxbOutput.xml"));

Unmarshalling:

Unmarshalling an XML document means creating a tree of content objects that represents the content and organization of the document

To unmarshal an XML document,

• Create a JAXBContext object( JAXBContext jaxbContext = JAXBContext.newInstance("package name ");
• Create an Unmarshaller object Unmarshaller unmarshaller = jc.createUnmarshaller();
• Call the unmarshal method unmarshaller.unmarshal(new File( "xml name"));
• Use the get methods in the schema-derived classes to access the XML data

See the following video on Introduction to Hibernate and it concepts: -

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