SAX Attributes,Java SAX Attributes

Getting Attributes And its Value

In this section, you will learn to retrieve the attributes and their value from a XML document using the SAX APIs.

Description of program:

This program helps you in retrieving attributes and their values. The parse() method is invoked by the SAXParser object. Override


startElement() method in

SAXHandler class to provide functionality to get the attribute and its value from a xml file.

Here is the XML File: sample.xml

<Employee-detail >
    <Employee name="Amit" >
        <address>My address</address>
     </Employee>
     <issued-items>
        <item code="111" type="CD" label=" music" />
        <item code="222" type="DVD" label=" video"/>
     </issued-items>
</Employee-detail>


import java.io.*;

import javax.xml.parsers.SAXParser;

import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.*;

import org.xml.sax.helpers.DefaultHandler;

import org.apache.xerces.util.* ;

import org.apache.xerces.impl.*;

import org.apache.xerces.parsers.*;

import org.apache.xerces.jaxp.*;



public class ReadAttributes {

  public static void main(String[] args) {

    try {

      BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));

      System.out.print("Enter a xml file name: ");

      String xmlFile = bf.readLine();

      File file = new File(xmlFile);

      if (file.exists()){

        //SAX-implementation:

        SAXParserFactory factory = SAXParserFactory.newInstance();

        // Create SAX-parser

        SAXParser parser = factory.newSAXParser();

        System.out.println("Name:\t" + "Value:");

        //Define a handler

        SaxHandler handler = new SaxHandler();

        // Parse the xml document

        parser.parse(xmlFile, handler);

      }

      else{

        System.out.println("File not found!");

      }

    } 

    catch (Exception e) {

      e.printStackTrace();

    }

  }

  

  private static class SaxHandler extends DefaultHandler {

    public void startElement(String uri, String localName, String qName, 

                   
Attributes attrs) throws SAXParseException,SAXException {

      int length = attrs.getLength();

      //Each attribute

      for (int i=0; i<length; i++) {

        // Get names and values to each attribute

        String name = attrs.getQName(i);

        System.out.print(name);

                String value = attrs.getValue(i);

        System.out.println("\t"+value);

      }

    }

  }

}

Output of this program:

C:\vinod\xml\sax1>javac ReadAttributes.java

C:\vinod\xml\sax1>java ReadAttributes
Enter a xml file name: sample.xml
Name:    Value:
name      Amit
code      111
type       CD
label       music
code      222
type       DVD
label      video