How to update xml files in java

Question

I have a xml file call data.xml like the code below. The project can run from client side no problem and it can read the xml file. The problem I have now is I I want to writ

Answer 1

This an example which i have tried for updating the xml files.

        String filepath="Test.xml";
        DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder docBuilder;
        docBuilder = docFactory.newDocumentBuilder();
        Document doc = docBuilder.parse(filepath);
        Node company = doc.getFirstChild();

        /**
         * Get the param from xml and set value
         */
        Node search = doc.getElementsByTagName("parameter").item(0);
        NamedNodeMap attr = search.getAttributes();
        Node nodeAttr = attr.getNamedItem("value");
        nodeAttr.setTextContent(param);

        /**
         * write it back to the xml
         */
        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        DOMSource source = new DOMSource(doc);
        StreamResult result = new StreamResult(new File(filepath));
        transformer.transform(source, result);

        System.out.println("Done");

Following is the XML file i have used:

Hope it helps!