aktuelle.kurse/oldies/m411/docs/Daten-Uebungen-CodeBeispiele/TestXml.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.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;


public class TestXml {

	/**
	 * @param args
	 */
	public static void main(String[] args) {


		String filename = "xml/characters.xml";
		TestXml test = new TestXml();
		
		NodeList list = test.generateNodeList(filename);
		
		for (int i=0; i < list.getLength(); i++){
			Node node = test.findSubNode("ARTIST", list.item(i));
			//the text value in a node is considered to be a child
			//so we have to get the childNode:
			NodeList textList = node.getChildNodes();
			System.out.println("Artist =" + textList.item(0).getNodeValue());
		}
		
	}
	
	
	public NodeList generateNodeList(String filename){
		
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    	DocumentBuilder db;
    	Document doc = null;
    	
		try {
			db = dbf.newDocumentBuilder();
			doc = db.parse(new File(filename));
		} catch (SAXException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		//puts all text nodes into full-depth underneath this node:
		doc.getDocumentElement().normalize();
		
		//get list of CDs:
		
		NodeList cdElements = doc.getElementsByTagName("CD");
		return cdElements;
	}
	
	
	
	
	/**
	 * Finds sub-nodes in an existing node
	 * @param name		name of child node we want
	 * @param node		current node
	 * @return
	 */
	
	public Node findSubNode(String name, Node node) {
	    if (node.getNodeType() != Node.ELEMENT_NODE) {
	        System.err.println("Error: Search node not of element type");
	        System.exit(22);
	    }

	    if (! node.hasChildNodes()) return null;

	    NodeList list = node.getChildNodes();
	    for (int i=0; i < list.getLength(); i++) {
	        Node subnode = list.item(i);
	        if (subnode.getNodeType() == Node.ELEMENT_NODE) {
	           if (subnode.getNodeName().equals(name)) 
	               return subnode;
	        }
	    }
	    return null;
	}


}