How to update an XML file?

Question

hi,
I am having an xml file like this.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE map [ <!ELEMENT map (entry*) >
<!ELEMENT entry EMPTY >
<!ATTLIST entry key ID #REQUIRED
value CDATA "mydefault"> ]>
<map>
<entry key="key1" value="xxx"/>
<entry key="key2" value="yyy"/>
</map>
I have written a DOMparsing program to parse this XML file. And the program is this,
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.TransformerException;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import java.io.File;
import java.io.IOException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.DOMException;
import org.w3c.dom.Attr;
import org.w3c.dom.NodeList;
public class DomExample
public static void main(String args[])
// Obtain an XML document; this method is implemented in
Document doc = parseXmlFile("sample1.xml", true);
//Getting elements by Tag name
NodeList nodeList= doc.getElementsByTagName("entry");
// Obtain an element
Element element = (Element)(nodeList.item(0));
element.removeAttribute("value");
element.setAttribute("value", "Manivannan");
try
TransformerFactory tFactory =TransformerFactory.newInstance();
StreamSource stylesource = new StreamSource();
Transformer transformer = tFactory.newTransformer(stylesource);
DOMSource source = new DOMSource(doc);
//File f1 = new File("Sample3.xml");
StreamResult result = new StreamResult(System.out);
transformer.transform(source, result);
     catch(TransformerException te)
     te.printStackTrace();
public static Document parseXmlFile(String filename, boolean validating) {
try {
// Create a builder factory
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(validating);
DocumentBuilder builder = factory.newDocumentBuilder();
// Create the builder and parse the file
Document doc = builder.parse(new File(filename));
return doc;
} catch (SAXException e) {
// A parsing error occurred; the xml input is not valid
} catch (ParserConfigurationException e) {
} catch (IOException e) {
return null;
Now what i am trying to do is replace value xxx in my xml with "Manivannan" and yyy with "gopalan"..But what i am getting during running this program is i am getting MalformedURL exception..Also will this program be able to update my xml with new values.If not possible pls let me know the method to update my xml file.
Thanks for your reply in advance.

Answer 1

Replace
StreamSource stylesource=new StreamSource();
Transformer transformer=tfactory.newTransformer(stylesource);with
Transformer transformer=tfactory.newTransformer();