Java servlet, DOM and xml help! please urgent!

Question

I have to write a servlet that takes the user input to build a xml document using DOM API and should be able to append new entry to that xml file whenever any user adds an entry. I have written the fillowing code, can anyone please take a look at this code and tell me the right way to do it as this code is actually not creating any xml file and also in commented line of this code I tried by giving blank xml file name with just root element, so that this code can enter new elements like name, title as child element of the root, but doesn't work.
PrintWriter out = res.getWriter ();
res.setContentType ("text/html");
try
Document xmldoc = null;
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
DOMImplementation impl = builder.getDOMImplementation();
// Document xmldoc = builder.parse(xmlfile name);
Element e = null;
Node n = null;
String name = req.getParameter("name");
String title = req.getParameter("title");
String address = req.getParameter("address");
xmldoc = impl.createDocument(null, "records", null);
Element root = xmldoc.getDocumentElement();
e = xmldoc.createElementNS(null, "name");
n = xmldoc.createTextNode(name);
e.appendChild(n);
root.appendChild(e);
e = xmldoc.createElementNS(null, "title");
n = xmldoc.createTextNode(title);
e.appendChild(n);
root.appendChild(e);
e = xmldoc.createElementNS(null, "address");
n = xmldoc.createTextNode(address);
e.appendChild(n);
root.appendChild(e);
DOMSource domSource = new DOMSource(xmldoc);
Source xslSource = new StreamSource (xsl file);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer(xslSource);
transformer.transform(domSource,new StreamResult (out));

Answer 1

Document xmldoc = null;
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
xmldoc = documentBuilder.newDocument();
Element e = null;
Node n = null;
String name = req.getParameter("name");
String title = req.getParameter("title");
String address = req.getParameter("address");
e = xmldoc.createElement("name");
n = xmldoc.createTextNode(name);
e.appendChild(n);
xmldoc.appendChild(e);
e = xmldoc.createElement("title");
n = xmldoc.createTextNode(title);
e.appendChild(n);
xmldoc.appendChild(e);
e = xmldoc.createElement("address");
n = xmldoc.createTextNode(address);
e.appendChild(n);
xmldoc.appendChild(e);
DOMSource domSource = new DOMSource(xmldoc);
StreamSource xslSource = new StreamSource (xsl file);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer(xslSource);
transformer.transform(domSource,new StreamResult (out));