XMLInfo.java Source code

Introduction

Here is the source code for XMLInfo.java

Source

import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class XMLInfo {

    public static void main(String args[]) {
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document document = builder.parse("xmlFileName.xml");
            Node root = document.getDocumentElement();
            System.out.print("Here is the document's root node:");
            System.out.println(" " + root.getNodeName());
            System.out.println("Here are its child elements: ");
            NodeList childNodes = root.getChildNodes();
            Node currentNode;

            for (int i = 0; i < childNodes.getLength(); i++) {
                currentNode = childNodes.item(i);
                System.out.println(currentNode.getNodeName());
            }

            // get first child of root element
            currentNode = root.getFirstChild();

            System.out.print("The first child of root node is: ");
            System.out.println(currentNode.getNodeName());

            // get next sibling of first child
            System.out.print("whose next sibling is: ");
            currentNode = currentNode.getNextSibling();
            System.out.println(currentNode.getNodeName());

            // print value of next sibling of first child
            System.out.println("value of " + currentNode.getNodeName() + " element is: "
                    + currentNode.getFirstChild().getNodeValue());

            // print name of parent of next sibling of first child
            System.out.print("Parent node of " + currentNode.getNodeName() + " is: "
                    + currentNode.getParentNode().getNodeName());
        }
        // handle exception creating DocumentBuilder
        catch (ParserConfigurationException parserError) {
            System.err.println("Parser Configuration Error");
            parserError.printStackTrace();
        }

        // handle exception reading data from file
        catch (IOException fileException) {
            System.err.println("File IO Error");
            fileException.printStackTrace();
        }

        // handle exception parsing XML document
        catch (SAXException parseException) {
            System.err.println("Error Parsing Document");
            parseException.printStackTrace();
        }
    }
}