Updating an existing xml file in java

Question

Hi,
i need to update an existing xml file with new nodes. But i don.t know how to do that. i can read and write a new xml file . But updaton seems too difficult for me.
my xml structure is like this
<main_node>
<node1>
<name> name1</name1>
<id>ID</id>
</node1>
<node2>
<name2> name2</name2.
<id>ID</id>
</node2.
</main_node>
i want to insert node3 in this structure.
please help, it,s urgent;
Thanks in Advance

Answer 1

here is the code if ur using dom..
Node node4 = doc.createTextNode(name3);
Element element4=doc.createElement("name3");
element4.append(node4);
c one thing that u should take care here is that u have created and is reflected on ly in ur document object and not in xml..for that u have to write some more code like this
// This method writes a DOM document to a file
public static void writeXmlFile(Document doc, String filename) {
try {
// Prepare the DOM document for writing
Source source = new DOMSource(doc);
// Prepare the output file
File file = new File(filename);
Result result = new StreamResult(file);
// Write the DOM document to the file
Transformer xformer = TransformerFactory.newInstance().newTransformer();
xformer.transform(source, result);
} catch (TransformerConfigurationException e) {
} catch (TransformerException e) {
look this code..that will help u
regards
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