XML document create with Java

[Harshana Dias]

Hey,

Can some one tell me how to create a XML document like following in java (in php it looks like following)

// Start XML file, create parent node
$dom = new DOMDocument("1.0");
$node = $dom->createElement("markers");
$parnode = $dom->appendChild($node);

while ($row = @mysql_fetch_assoc($result)){
  $node = $dom->createElement("marker");
  $newnode = $parnode->appendChild($node);
  $newnode->setAttribute("name", $row['name']);
  $newnode->setAttribute("address", $row['address']);
  $newnode->setAttribute("lat", $row['lat']);
  $newnode->setAttribute("lng", $row['lng']);
  $newnode->setAttribute("distance", $row['distance']);
}

echo $dom->saveXML();   // i am output this here since its a ajax called for this php script and the created xml doument is sending back as echo. 
?>

To be more specific im try to build this google map app using java http://code.google.com/apis/maps/articles/phpsqlsearch.html

Thank You.

[Sebastian Janisch]

SAXParser is a good XML parser for java. The sematics of xml parsers don't differ too much, it comes down to navigating through the DOM tree.

[Ulas Ergin]

see NanoXML,it is a very simple to ise DOM parser.

[Jesper de Jong]

It looks like Harshana is looking for a way to generate an XML document - not for parsing an XML document.

You could use the XML stream API for that (see the package javax.xml.stream, new in Java 6), or you can just do it the simple way by printing the content out:

PrintWriter out = new PrintWriter("output.xml");

out.println("<?xml version=\"1.0\"?>");
out.println("<markers>");

for (...) {  // fill in your own code here
	out.print("<marker");
	out.print(" name=\"" + obj.getName() + "\"");
	out.print(" address=\"" + obj.getAddress() + "\"");
	out.print(" lat=\"" + obj.getLat() + "\"");
	out.print(" lng=\"" + obj.getLng() + "\"");
	out.print(" distance=\"" + obj.getDistance() + "\"");
	out.println("></marker>");
}

out.println("</markers>");

out.flush();
out.close();

[Rob Spoor]

That's not great though. It doesn't handle escaping very well. I'd recommend a third party as well - JDOM.

Alternatively, you can use the Java SE API:

DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.newDocument();
Element root = doc.createElement("root");
doc.appendChild(root);
Element child = doc.createElement("child");
child.setAttribute("id", "481");
root.appendChild(child);
Transformer transformer = TransformerFactory.newInstance().newTransformer();
Source source = new DOMSource(doc);
Result target = new StreamResult(xmlFile);
transformer.transform(source, target);

Output:

<?xml version="1.0" encoding="UTF-8" standalone="no"?><root><child id="481"/></root>

With thanks to Core Java Volume II

[Harshana Dias]

Thank You very much guys for your valuable ideas..im kind of researching on it these days with what you guys said