import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Element;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.TransformerException;
import javax.xml.transform.OutputKeys;

class Program02 {
	private static Document buildDoc() {
		Document doc = null;
		try {
			doc = tryBuildDoc();
		}catch(ParserConfigurationException ex) {
			System.err.println("Hiba a dokumentum létrehozása során!");
		}
		return doc;
	}
	private static Document tryBuildDoc() 
			throws ParserConfigurationException{
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		DocumentBuilder db = dbf.newDocumentBuilder();
		Document doc = db.newDocument();
		return doc;
	}
	private static void createXml(Document doc) {		
		Element root = doc.createElement("vallalat");
		doc.appendChild(root);
		
		Element dolgozo = doc.createElement("dolgozo");
		root.appendChild(dolgozo);

		Attr attr = doc.createAttribute("id");
		attr.setValue("1");
		dolgozo.setAttributeNode(attr);	
		
		Element nev = doc.createElement("nev");
		nev.appendChild(doc.createTextNode("Nagy Mihály"));
		dolgozo.appendChild(nev);
		
		Element telepules = doc.createElement("telepules");
		telepules.appendChild(doc.createTextNode("Szolnok"));
		dolgozo.appendChild(telepules);
		
		Element fizetes = doc.createElement("fizetes");
		fizetes.appendChild(doc.createTextNode("845000"));
		dolgozo.appendChild(fizetes);
	}
	private static void writeXml(Document doc) {
		try {
			tryWriteXml(doc);
		}catch(TransformerConfigurationException ex) {
			System.err.println("Hiba az XML létrehozása során!");
		}catch(TransformerException ex) {
			System.err.println("Hiba az átalakítás során!");
		}
	}
	private static void tryWriteXml(Document doc) 
			throws TransformerConfigurationException, 
			TransformerException {
		TransformerFactory tf = TransformerFactory.newInstance();
		Transformer t = tf.newTransformer();
		DOMSource source = new DOMSource(doc);
		StreamResult result = new StreamResult("vallalat.xml");
		//~ StreamResult result =  new StreamResult(System.out);
		t.setOutputProperty(OutputKeys.INDENT, "yes");
		t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
		t.transform(source, result);
	}
	public static void main(String[] args) {
		Document doc = buildDoc();
		createXml(doc);
		writeXml(doc);
		System.out.println("A xml fájl készítés vége.");
	}
}