Validate XML String against an XSD

JAXBContext jc = JAXBContext.newInstance(<<You class>>);

JAXBSource source = new JAXBSource(jc, <<your class object>>);

SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); 

Schema schema = sf.newSchema(new File("<<your XSD>>")); 

Validator validator = schema.newValidator();

validator.setErrorHandler(new MyErrorHandler());

validator.validate(source);

import org.xml.sax.ErrorHandler;

import org.xml.sax.SAXException;

import org.xml.sax.SAXParseException;

public class MyErrorHandler implements ErrorHandler {

    public void warning(SAXParseException exception) throws SAXException {

        System.out.println("\nWARNING");

        exception.printStackTrace();

    }

    public void error(SAXParseException exception) throws SAXException {

        System.out.println("\nERROR");

        exception.printStackTrace();

    }

    public void fatalError(SAXParseException exception) throws SAXException {

        System.out.println("\nFATAL ERROR");

        exception.printStackTrace();

    }

}