JDK Tutorials - Herong's Tutorial Examples - Version 6.02, by Dr. Herong Yang
XML XSD Schema Validation with Xerces
This section provides a tutorial example on how to write a XML schema validation program, XMLReaderValidator.java, with the Xerces parser.
If you are still using JDK 1.4.1, XMLReaderValidator2.java will not work, because JDK 1.4.1 has no built-in class to support XML validation against XSD rules. So you have to downloaded one of the most popular XML parsers in the public domain, Xerces-J at: http://xml.apache.org/dist/xerces-j.
I downloaded Xerces-J-bin.2.11.0.zip, I unzipped it into \local\xerces-2_11_0 directory. Make sure that xercesImpt.jar is in that directory.
Now I am ready to use "org.apache.xerces.parsers.SAXParser" from the Xerces-J parser to validate any XML files against the specified XSD files:
/* XMLReaderValidator.java - Copyright (c) 2014, HerongYang.com, All Rights Reserved. */ import java.io.IOException; import org.xml.sax.XMLReader; import org.xml.sax.helpers.DefaultHandler; import org.xml.sax.helpers.XMLReaderFactory; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; class XMLReaderValidator { public static void main(String[] args) { String parserClass = "org.apache.xerces.parsers.SAXParser"; String validationFeature = "http://xml.org/sax/features/validation"; String schemaFeature = "http://apache.org/xml/features/validation/schema"; try { String x = args[0]; XMLReader r = XMLReaderFactory.createXMLReader(parserClass); r.setFeature(validationFeature,true); r.setFeature(schemaFeature,true); r.setErrorHandler(new MyErrorHandler()); r.parse(x); } 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()); } } }
Note that I used the XMLReaderFactory.createXMLReader() method to create an XMLReader with the specified Xerces parser class.
Now run the XMLReaderValidator program:
>java -cp .;\local\xerces-2_11_0\xercesImpl.jar XMLReaderValidator dictrionary_invalid_xsd.xml
You will get the same validation error report as running XMLReaderValidator2.java.
Last update: 2014.
Table of Contents
Downloading and Installing JDK 1.8.0 on Windows
Downloading and Installing JDK 1.7.0 on Windows
Downloading and Installing JDK 1.6.2 on Windows
Date, Time and Calendar Classes
Date and Time Object and String Conversion
Number Object and Numeric String Conversion
Locales, Localization Methods and Resource Bundles
Calling and Importing Classes Defined in Unnamed Packages
HashSet, Vector, HashMap and Collection Classes
Character Set Encoding Classes and Methods
Encoding Conversion Programs for Encoded Text Files
Datagram Network Communication
DOM (Document Object Model) - API for XML Files
DTD (Document Type Definition) - XML Validation
►XSD (XML Schema Definition) - XML Validation
XML XSD Schema Validation Test Result
►XML XSD Schema Validation with Xerces
XSD Validation Failed with SAXParserFactory
XSD Schema Validator on XML SAX Object
XSL (Extensible Stylesheet Language)
Message Digest Algorithm Implementations in JDK
Private key and Public Key Pair Generation
PKCS#8/X.509 Private/Public Encoding Standards
Digital Signature Algorithm and Sample Program
"keytool" Commands and "keystore" Files
KeyStore and Certificate Classes
Secret Key Generation and Management
Cipher - Secret Key Encryption and Decryption
The SSL (Secure Socket Layer) Protocol
SSL Socket Communication Testing Programs