JAXP-DOM验证XML

import java.io.File;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;

// JAXP
import javax.xml.XMLConstants;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;

// DOM
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class TestDOMValidation {

    public static void main(String[] args) {
        try {
            if (args.length != 2) {
                System.err.println ("Usage: java TestDOMValidation " +
                                    "[xml filename] [schema filename]");
                System.exit (1);
            }

            // Get Document Builder Factory
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

            // Leave off validation, and turn off namespaces
            factory.setValidating(false);
            factory.setNamespaceAware(false);

            DocumentBuilder builder = factory.newDocumentBuilder();
            Document doc = builder.parse(new File(args[0]));

            // Handle validation
            SchemaFactory constraintFactory = 
                SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
            Source constraints = new StreamSource(new File(args[1]));
            Schema schema = constraintFactory.newSchema(constraints);
            Validator validator = schema.newValidator();

            // Validate the DOM tree
            try {
                validator.validate(new DOMSource(doc));
                System.out.println("Document validates fine.");
            } catch (org.xml.sax.SAXException e) {
                System.out.println("Validation error: " + e.getMessage());
            }

        } catch (ParserConfigurationException e) {
            System.out.println("The underlying parser does not support the requested features.");
        } catch (FactoryConfigurationError e) {
            System.out.println("Error occurred obtaining Document Builder Factory.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}