Java Utililty Methods XML Validate

void validateXml(final Schema schema, final byte[] xmlBytes)
validate Xml

validateXml(schema, new ByteArrayInputStream(xmlBytes));

void validateXml(InputStream xml, InputStream xsd)
validate Xml

try {
 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
 dbf.setNamespaceAware(true);
 Document doc = dbf.newDocumentBuilder().parse(xml);
 validateXml(doc, xsd);
} finally {
 closeStream(xml);
 closeStream(xsd);
...

boolean validateXML(String schemaPath, String xmlPath)
validate XML

try {
 String schemaLang = "http://www.w3.org/2001/XMLSchema";
 SchemaFactory factory = SchemaFactory.newInstance(schemaLang);
 Schema schema = factory.newSchema(new StreamSource(schemaPath));
 Validator validator = schema.newValidator();
 validator.validate(new StreamSource(xmlPath));
} catch (Exception ex) {
 return false;
...

void validateXML(String xml, String schemaURI, DefaultHandler handler)
This method will validate the the XML String passed in afainst the Schema Location passed in as a parameter.

SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.XML_NS_URI);
StreamSource ss = new StreamSource(schemaURI);
Schema schema = sf.newSchema(ss);
SAXParserFactory spf = SAXParserFactory.newInstance();
spf.setSchema(schema);
spf.setNamespaceAware(true);
javax.xml.parsers.SAXParser saxParser = spf.newSAXParser();
saxParser.parse(new ByteArrayInputStream(xml.getBytes()), handler);
...

void validateXMLFile(String filename, String schemaFile)
Validate the contents of a file against an XML Schema.

DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document document = parser.parse(new File(filename));
SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = schemaFactory.newSchema(new File(schemaFile));
Validator validator = schema.newValidator();
validator.validate(new DOMSource(document));

void validateXmlOnSchema(File xmlSchema, Source sourceXml)
Validates XML on a XMLschema

Schema schema = newSchema(xmlSchema);
try {
 schema.newValidator().validate(sourceXml);
} catch (Exception e) {
 throw new RuntimeException(
 "Could not validate '" + sourceXml.getSystemId() + "' with '" + xmlSchema.getName() + "'!", e);