Ajax call response

[otnj2ee]

Use the Ajax to make the call to the server side.

In the front end/browser, I send the request.

On the server side, there could be two ways to return a xml string:

But first, create the Document

factory = DocumentBuilderFactory.newInstance();
builder = factory.newDocumentBuilder();
Document doc = builder.newDocument();

Element tree = doc.createElement("tree");
tree.setAttribute("id","0");
doc.appendChild(tree);
…
…

#1) convert doc to a xml String
ByteArrayOutputStream baos = new ByteArrayOutputStream();
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer();
t.setOutputProperty("encoding","UTF-8");
t.transform(new DOMSource(doc),new StreamResult(baos));
String xmlString = new String(baos.toByteArray(), "utf8");

//send the xmlString back to the front end
response.getOutputStream().println(xmlString);


#2)send back the doc, instead
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer();
t.transform(new DOMSource(doc), new StreamResult(response.getOutputStream()));


My questions are:

1)What is the difference between the #1) and #2)?
2)Under what circumstance should use the one not the other (between #1 and #2)?
3)Should I use the responseXML to receive the response from #1) and #2)?


Thanks Scott

[rwedge]

Isn't that Java syntax? This is a Javascript fourm.