针对XSD验证XML

仅返回true或false（也不需要任何外部库）：

static boolean validateAgainstXSD(InputStream xml, InputStream xsd){    try    {        SchemaFactory factory =  SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);        Schema schema = factory.newSchema(new StreamSource(xsd));        Validator validator = schema.newValidator();        validator.validate(new StreamSource(xml));        return true;    }    catch(Exception ex)    {        return false;    }}