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Java get Node Value
Posted on: November 1, 2008 at 12:00 AM

In this section, you will learn how to obtain the node value. Before any further processing, you need a XML file. For this we have create a employee.xml file.

Java get Node Value

In this section, you will learn how to obtain the node value. Before any further processing, you need a XML file. For this we have create a employee.xml file. Now to read the 'employee.xml' file, we have used DocumentBuilderFactory to enable application to obtain a parser Then the DocumentBuilder parse and build the XML document. The Document class access the document's data.

builder.parse(file)- This method parse the content of 'employee.xml' file as an XML document an return the DOM object.
getDocumentElement()- This method allows direct access to the child node that is the root element.
getNodeName()- This method returns the node name.
doc.getElementsByTagName("employee")-This method returns the list of nodes of all the Elements with a given tag name.
getChildNodes()-This method provides all the children of this node.
getNodeValue()- This method returns the node value.

Here is the 'employee.xml' file

<?xml version="1.0" encoding="UTF-8"?>
<company>
<employee>
<firstname>Anusmita</firstname>
<lastname>Singh</lastname>
</employee>
</company>

Here is the code of GetNodeValue

import java.io.*;
import org.w3c.dom.*;
import javax.xml.parsers.*;

public class GetNodeValue {
    public static void main(String[] args) throws Exception {
        File file = new File("employee.xml");
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        Document doc = db.parse(file);
        new GetNodeValue().GettingText(doc);
    }
    public void GettingText(Document doc) {
       Element e = doc.getDocumentElement();
        NodeList nodeList = doc.getElementsByTagName("employee");
        for (int i = 0; i < nodeList.getLength(); i++) {
            Node node = nodeList.item(i);
            if (node.getNodeType() == Node.ELEMENT_NODE) {
                Element element = (Element) node;
                NodeList nodelist = element.getElementsByTagName("firstname");
                Element element1 = (Element) nodelist.item(0);
                NodeList fstNm = element1.getChildNodes();
                System.out.print("First Name : " + (fstNm.item(0)).getNodeValue());
               }
        }
    }
}

Output will be displayed as:

Download Source Code

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