How to replace one tag with another tag in XML using Java?

Question

I have an XML file as shown below in which I need to replace a tag with another tag:

<?xml version="1.0" encoding='utf-8'?>

<result>

    <!-- some xml data along with lot of other tags -->

</result>

Now I want this XML to be like this: As you can see result tag is replaced with ClientHolder tag and everything else within result tag is same in ClientHolder tag as well.

<?xml version="1.0" encoding='utf-8'?>

<ClientHolder xmlns="http://www.host.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.host.com model.xsd">

    <!-- some xml data along with lot of other tags -->

</ClientHolder>

Here is my code so far and after that I am not able to understand how to use Document object to do above stuff:

String fileName = location + "/" + "client_" + clientId + ".xml";
File clientFile = new File(fileName);
Document doc = parseXML(clientFile);

// now how to use doc object?

Good question. I don't know your question.

T8Z
– T8Z

2015-09-25 04:01:10 +00:00
Commented Sep 25, 2015 at 4:01 — T8Z
– T8Z, Commented Sep 25, 2015 at 4:01
Check stackoverflow.com/questions/1299926/…

user2953113
– user2953113

2015-09-25 04:21:37 +00:00
Commented Sep 25, 2015 at 4:21 — user2953113
– user2953113, Commented Sep 25, 2015 at 4:21

Stanislav · Accepted Answer · 2015-09-25 07:38:00Z

You can get all the nodes named as result and then modify them all, renaming the node and adding additional attributes:

NodeList nodes = doc.getElementsByTagName("result");
for (int i = 0; i < nodes.getLength(); i++) {
    Node node = nodes.item(i);
    doc.renameNode(node, null, "ClientHolder");
    Element element = (Element) node;
    element.setAttribute("xmlns", "http://www.host.com");
    element.setAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
    element.setAttribute("xsi:schemaLocation", "http://www.host.com model.xsd");
}

Here is the imports:

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

And this is how you can save it to file:

Transformer transformer = TransformerFactory.newInstance().newTransformer();
Result output = new StreamResult(clientFile);
Source input = new DOMSource(doc);
transformer.transform(input, output);

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