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Replacing a Node with a New One
Posted on: August 24, 2008 at 12:00 AM

This Example shows you how to Replace a node with existing node in a DOM document.

Replacing a Node with a New One

This Example shows you how to Replace a node with existing node 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. These are some of the methods used in code given below for adding attribute:-

root.getFirstChild().getFirstChild().getNodeName():-Access the subchild name of the root.

Node schild = fchild.getNextSibling():-it returns the node immediately following the node fchild.

root.replaceChild(schild, fchild):-This method replaces a child node with another.

Xml code for the program generated is:-

<?xml version="1.0" encoding="UTF-8"?>
<Company>
    <Location>
        <Companyname>Roseindia .Net</Companyname>
        <Employee>Girish Tewari</Employee>
    </Location>
    <Id></Id>>
</Company>

Replacenode.java

/* 

         * @Program that Replace an Existing Node with a New One

         * Replacenode.java 

         * Author:-RoseIndia Team

         * Date:-09-Jun-2008

         */

        

        import java.io.*;

        import javax.xml.parsers.*;

        import org.w3c.dom.*;

        

        public class Replacenode {

        

          public static void main(String[] args) throws Exception {

          DocumentBuilderFactory factory = 

  DocumentBuilderFactory.newInstance();

          Document doc = factory.newDocumentBuilder().parse(

   new File("Document4.xml"));

          new Replacenode().replacePerson(doc);

          }

        

          public void replacePerson(Document doc) {

        

          Element root = doc.getDocumentElement();

        

          System.out.println("Node before replacing is :" +

          root.getFirstChild().getFirstChild().getNodeName());

        

          Node fchild = root.getFirstChild();

          //finds the next child of the fchild

          Node schild = fchild.getNextSibling();

          

          //Replaces the fchild with schild  

          root.replaceChild(schild, fchild);

        

          System.out.println("Node after replacing name is:" +

          root.getFirstChild().getNodeName());

        

          }

        }

Output of the program:-

Node before replacing is :Companyname
Node after replacing name is:Id

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