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Listing nodes used in a document

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In this section, you will learn how to use of lists of a DOM document.

Listing nodes used in a document

     

This Example shows you the Lists of nodes used in a DOM document. JAXP (Java API for XML Processing) is an interface which provides parsing of xml documents. Here the Document BuilderFactory is used to create new DOM parsers.There are some of the methods used in code given below for Listing nodes of a DOM Tree:-

SAXBuilder builder = new SAXBuilder():-Creates a new SAXBuilder and will first locate a parser via JAXP, then will try to use a set of default SAX Drivers.

Element root = doc.getRootElement():-Returns top-level element of the document.

Iterator iterator = children.iterator():-Iterator is an interface and are just like as enemuration in java collection.Iterator allow the caller to remove elements from the underlying collection during the iteration.

Xml code for the program generated is:-

<?xml version="1.0" encoding="UTF-8"?>
<!-- Information About Employees -->
<Company>
  <Employee Id="Rose-2345">
  <CompanyName>Newstrack</CompanyName>
  <City>Rohini</City>>
  <name>Girish Tewari</name>
  <Phoneno>1234567890</Phoneno>
 <Doj>May 2008</Doj>
  </Employee>
  <!-- Information about other  Employee -->  
  <Employee Id="Rose-2346">
  <CompanyName>RoseIndia.net</CompanyName>
 <City>Lucknow</City>
 <name>Mahendra Singh</name>
  <Phoneno>123652314</Phoneno>
  <Doj>May 2008</Doj>
  </Employee>
</Company>
  

ListingNodes.java

/* 
 * @Program that lists the nodes used in a document
 * ListingNodes.java 
 * Author:-RoseIndia Team
 * Date:-23-July-2008
 */

import org.jdom.*;
import org.jdom.input.SAXBuilder;
import java.util.*;

public class 
ListingNodes {
  public static void main(String[] argsthrows Exception {
  SAXBuilder builder = new SAXBuilder();
  Document doc = builder.build("Document4.xml");
  Element root = doc.getRootElement();
  listnode(root);
  }

  public static void listnode(Element element) {
  System.out.println(element.getName());
  List children = element.getChildren();
  Iterator iterator = children.iterator();
  while (iterator.hasNext()) {
  Element child = (Elementiterator.next();
  listnode(child);
  }
  }
}
  

Output of the program:-

Company

Employee

CompanyName

City

name

Phoneno

Doj

Employee

CompanyName

City

name

Phoneno

Doj

 
  


DownLoad Source Code

     

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Posted on: August 24, 2008

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