DTDHandlerExample

 

Create Project : DemoSAXinJAXP

Create file XML : Data.xml

<?xml version="1.0"encoding="UTF-8"?>

<!DOCTYPE mountains[

<!ELEMENT mountains (mountain)*>

<!ELEMENT mountain (name)*>

<!NOTATION GIF SYSTEM "image/gif">

<!NOTATION JPG SYSTEM "image/jpeg">

<!NOTATION PNG SYSTEM "image/png">

<!ATTLIST mountain

  photo ENTITY #IMPLIED

  photo_type NOTATION (GIF | JPG | PNG) #IMPLIED>

<!ENTITY mt_cook_1 SYSTEM "mt_cook1.jpg"NDATA gif>

<!ELEMENT name (#PCDATA)>

]>

<mountains>

  <mountain photo="mt_cook_1"photo_type="JPG">

    <name>Thai Son</name>

  </mountain>

  <mountain>

    <name>Everest</name>

  </mountain>

</mountains>

 

Create class : DTDHandlerExample

 

package Aptech.JavaXML.Module3;

 

import org.xml.sax.SAXException;

import org.xml.sax.helpers.DefaultHandler;

 

publicclassDTDHandlerExampleextends DefaultHandler {

 

    staticboolean notationFound = false;

    staticboolean unparsedEntityFound = false;

 

    /*

     * The parser calls this method whenever it encounters a notation

     * declaration during parsing of a DTD

     */

    @Override

    publicvoidnotationDecl(String name, String publicID, String systemID) {

        // inform the user that new notation is found in DTD

        notationFound = true;

        System.out.println("Notation found: "+ name);

    }

    /*

     * The parser calls this method to notify an unparsed entity declaration

     */

 

    @Override

    publicvoidunparsedEntityDecl(String name, String publicID, String systemID, String notationName) {

        // inform user that an uparsed entity was found

        unparsedEntityFound = true;

        System.out.println("Unparsed Entity "+ name + " uses "+ notationName);

    }

    /*

     * The parser calls this method whenever it encounters the end of

     * document during processing.

     */

 

    @Override

    publicvoidendDocument() throws SAXException {

        // print appropriate message to the user if no new notation or unparsed entities found.

        if(!notationFound) {

            System.out.println("No new notations found");

        }

        if(!unparsedEntityFound) {

            System.out.println("No unparsed entities found");

        }

    }

}

 

 

 

 

 

 

Create class : DTDHandlerExample

package Aptech.JavaXML.Module3;

import java.io.File;

import javax.xml.parsers.SAXParser;

import javax.xml.parsers.SAXParserFactory;

publicclassTestDTDHandlerExample{

 

    publicstaticvoidmain(String[] args) {

        String path = "src\\Aptech\\JavaXML\\Module3\\Data.xml";

 

        // Create class instance for the SAX event handler

        DTDHandlerExample saxObject = newDTDHandlerExample();

        // Create factory

        SAXParserFactory spf = SAXParserFactory.newInstance();

        try{

            // Create parse

            SAXParser parser = spf.newSAXParser();

            // Parse document

            parser.parse(newFile(path), saxObject);

        } catch(Exception e) {

            e.printStackTrace();

            System.exit(1);

        }

    }

}