SAXParser for XSD Validation in JDK 1.7

XSD Tutorials - Herong's Tutorial Examples

∟SAXParser for XSD Validation in JDK 1.7

This section describes a tutorial example on how to the Xerces2 SAXParser class included in JDK 1.7 to perform XSD validation on an XML document. The XSD document must be specified with SAXParser.setProperty() method.

To fix the XSD loading problem with SAXValidator.java, I revised the program using the SAXParser.setProperty() method to set the XSD document explicitly:

/* SAXValidatorJdk17.java
 - Copyright (c) 2013, HerongYang.com, All Rights Reserved.
 */
import java.io.File;
import java.io.IOException;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;
class SAXValidatorJdk17 {
   public static void main(String[] args) {
      String schemaFeature 
         = "http://apache.org/xml/features/validation/schema";
      try {
         File x = new File(args[0]);
         String schemaLocation = args[1];
         
         SAXParserFactory f = SAXParserFactory.newInstance();
         System.out.println(f.toString());
         f.setValidating(true);
         f.setFeature(schemaFeature,true);

         SAXParser p = f.newSAXParser();
         System.out.println(p.toString());

         p.setProperty(
            "http://apache.org/xml/properties/schema"
            +"/external-noNamespaceSchemaLocation",schemaLocation);
             
         p.setProperty(
        "http://java.sun.com/xml/jaxp/properties/schemaLanguage",
        "http://www.w3.org/2001/XMLSchema");
        
         DefaultHandler h = new MyErrorHandler();
         p.parse(x,h);
      } catch (ParserConfigurationException e) {
         System.out.println(e.toString()); 
      } catch (SAXException e) {
         System.out.println(e.toString()); 
      } catch (IOException e) {
         System.out.println(e.toString()); 
      }
   }
   private static class MyErrorHandler extends DefaultHandler {
      public void warning(SAXParseException e) throws SAXException {
         System.out.println("Warning: "); 
         printInfo(e);
      }
      public void error(SAXParseException e) throws SAXException {
         System.out.println("Error: "); 
         printInfo(e);
      }
      public void fatalError(SAXParseException e) throws SAXException {
         System.out.println("Fattal error: "); 
         printInfo(e);
      }
      private void printInfo(SAXParseException e) {
         System.out.println("   Public ID: "+e.getPublicId());
         System.out.println("   System ID: "+e.getSystemId());
         System.out.println("   Line number: "+e.getLineNumber());
         System.out.println("   Column number: "+e.getColumnNumber());
         System.out.println("   Message: "+e.getMessage());
      }
   }
}

Run it on JDK 1.7:

c:\Progra~1\Java\jdk1.7.0_07\bin\javac SAXValidatorJdk17.java

c:\Progra~1\Java\jdk1.7.0_07\bin\java SAXValidatorJdk17 
   dictionary_invalid_xsd.xml dictionary.xsd

com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl@1833955
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl@4b82d2

Error:
   Public ID: null
   System ID: file:/C:/herong/dictionary_invalid_xsd.xml
   Line number: 3
   Column number: 49
   Message: cvc-complex-type.3.2.2: Attribute 
   'xsi:noNamespaceSchemaLocation' is not allowed to appear in element
   'dictionary'.
 
Error:
   Public ID: null
   System ID: file:/C:/herong/dictionary_invalid_xsd.xml
   Line number: 7
   Column number: 22
   Message: cvc-datatype-valid.1.2.1: 'yes' is not a valid value for 
   'boolean'.

...

Interestingly, the "xerces" implementation included in JDK 1.7 does not like the attribute xsi:noNamespaceSchemaLocation="..." used in the XML document to specify the XSD document.

Last update: 2013.

Table of Contents

About This Book

Introduction to XML Schema

XML Editor and Schema Processor - XMLPad

Java API for XML Processing - JAXP

JAXP - XML Schema (XSD) Validation

Xerces2 Java Parser - Java API of XML Parsers

►Using Xerces2 Java API

XML Schema (XSD) Validation using XMLReader

Running XMLReaderValidator with Xerces2 2.11.0 Beta

Running XMLReaderValidator on XSD 1.1 Schema