Simple Java DOM XML Processing Example (See related posts)

import java.io.*;

import org.w3c.dom.*;

import javax.xml.parsers.*;

import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;

public class DomXmlExample {

    /**
     * Our goal is to create a DOM XML tree and then print the XML.
     */
    public static void main (String args[]) {
        new DomXmlExample();
    }

    public DomXmlExample() {
        try {
            /////////////////////////////
            // Creating an empty XML Document

            // We need a Document
            DocumentBuilderFactory dbfac = DocumentBuilderFactory.newInstance();
            DocumentBuilder docBuilder = dbfac.newDocumentBuilder();
            Document doc = docBuilder.newDocument();

            ////////////////////////
            // Creating the XML tree

            // create the root element and add it to the document
            Element root = doc.createElement("root");
            doc.appendChild(root);

            // create a comment and put it in the root element
            Comment comment = doc.createComment("Just a thought");
            root.appendChild(comment);

            // create child element, add an attribute, and add to root
            Element child = doc.createElement("child");
            child.setAttribute("name", "value");
            root.appendChild(child);

            // add a text element to the child
            Text text = doc.createTextNode("Filler, ... I could have had a foo!");
            child.appendChild(text);

            /////////////////
            // Output the XML

            // set up a transformer
            TransformerFactory transfac = TransformerFactory.newInstance();
            Transformer trans = transfac.newTransformer();
            trans.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
            trans.setOutputProperty(OutputKeys.INDENT, "yes");

            // create string from xml tree
            StringWriter sw = new StringWriter();
            StreamResult result = new StreamResult(sw);
            DOMSource source = new DOMSource(doc);
            trans.transform(source, result);
            String xmlString = sw.toString();

            // print xml
            System.out.println("Here's the xml:\n\n" + xmlString);

        } catch (Exception e) {
            System.out.println(e);
        }
    }
}