XML with XSD JAVA

Question

I have been assigned a work to validate a XML against an XSD and if everything passed will parse the XML so that can import the same in to my system.

My Question is that what is the best way to validate an XML against the XSD and which is the best API for parsing the XML in to my domain object.

Looking for valuable suggestions

Answer 1

Part 1 - Validate XML

You can use the javax.xml.validation APIs for this.

SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); 
URL schemaURL = // The URL to your XML Schema; 
Schema schema = sf.newSchema(schemaURL); 
Validator validator = schema.newValidator();
validator.validate(xml);

Part 2 - OXM

Regarding the second part of your question, the best API for parsing XML into the domain object is JAXB. JAXB is a specification with multiple implementations. I lead the MOXy JAXB implementation that contains useful extensions such as XPath based mapping.

You could always do the validation during the conversion of XML to objects:

JAXBContext jc = JAXBContext.newInstance(Customer.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();

SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); 
URL schemaURL = // The URL to your XML Schema; 
Schema schema = sf.newSchema(schemaURL); 
unmarshaller.setSchema(schema);

JAXBElement<Customer> element = (JAXBElement<Customer>) unmarshaller.unmarshal(xml);
Customer customer = elemnt.getValue();