Java by API/javax.xml.parsers/DocumentBuilder

DocumentBuilder: newDocument()

   <source lang="java">

/*

<?xml version="1.0" encoding="UTF-8"?>
<book id="javanut4">
   <chapter>
      <title>Chapter 1</title>
      <para/>
   </chapter>
   <chapter>
      <title>Chapter 2</title>
      <para/>
   </chapter>
   <chapter>
      <title>Chapter 3</title>
      <para/>
   </chapter>
</book>
*/

import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.w3c.dom.Document; import org.w3c.dom.Element; public class MainClass {

 public static void main(String[] args) throws Exception{
   DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
   DocumentBuilder db = dbf.newDocumentBuilder();
   Document document = db.newDocument();
   Element book = document.createElement("book"); 
   book.setAttribute("id", "javanut4");           
   document.appendChild(book);                    
   for(int i = 1; i <= 3; i++) {                  
       Element chapter = document.createElement("chapter");
       Element title = document.createElement("title");
       title.appendChild(document.createTextNode("Chapter " + i));
       chapter.appendChild(title);
       chapter.appendChild(document.createElement("para"));
       book.appendChild(chapter);
   }
   TransformerFactory tf = TransformerFactory.newInstance();
   Transformer transformer = tf.newTransformer();
   DOMSource source = new DOMSource(document);          
   StreamResult result = new StreamResult(System.out);  
   transformer.transform(source, result);
 }

}

      </source>
   
  
 
  

DocumentBuilder: parse(File f)

   <source lang="java">

import java.io.File; 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.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class MainClass {

 public static void main(String[] args) throws IOException, ParserConfigurationException,
     org.xml.sax.SAXException {
   DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
   factory.setIgnoringComments(true);
   factory.setCoalescing(true); // Convert CDATA to Text nodes
   factory.setNamespaceAware(false); // No namespaces: this is default
   factory.setValidating(false); // Don"t validate DTD: also default
   DocumentBuilder parser = factory.newDocumentBuilder();
   Document document = parser.parse(new File(args[0]));
   NodeList sections = document.getElementsByTagName("sect1");
   int numSections = sections.getLength();
   for (int i = 0; i < numSections; i++) {
     Element section = (Element) sections.item(i); // A <sect1>
     Node title = section.getFirstChild();
     while (title != null && title.getNodeType() != Node.ELEMENT_NODE)
       title = title.getNextSibling();
     if (title != null)
       System.out.println(title.getFirstChild().getNodeValue());
   }
 }

}

      </source>