Re: Java & XML-DOM. Change the tag name of an Element object.
David Portabella wrote:
Using the Java package org.w3c.dom,
I have an Element object.
How can I change the tagName of a given Element?
There is the method Element.getTagName(),
but I did not find the method Element.setTagName() or equivalent.
One solution could be to create a new Element, with the new name, move
all the children and attributes from the old element to the new one,
and to replace the new element for the old one in the tree.
Is there a simpler and more natural solution?
some xml util package (that works with org.w3c.dom)?
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.PrintStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.apache.xml.serialize.OutputFormat;
import org.apache.xml.serialize.XMLSerializer;
import org.apache.xpath.XPathAPI;
import org.w3c.dom.Document;
public class RenameNode {
private static void print(PrintStream out, Document doc) throws
IOException {
OutputFormat fmt = new OutputFormat();
fmt.setIndenting(true);
XMLSerializer ser = new XMLSerializer(out, fmt);
ser.serialize(doc);
}
public static void main(String[] args) throws Exception {
String xml = "<doc><a>1</a><b>22</b><c>333</c></doc>";
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new ByteArrayInputStream(xml.getBytes()));
print(System.out, doc);
doc.renameNode(XPathAPI.selectSingleNode(doc.getDocumentElement(),
"/doc/b"), null, "b2");
print(System.out, doc);
}
}
outputs:
<?xml version="1.0" encoding="UTF-8"?>
<doc>
<a>1</a>
<b>22</b>
<c>333</c>
</doc>
<?xml version="1.0" encoding="UTF-8"?>
<doc>
<a>1</a>
<b2>22</b2>
<c>333</c>
</doc>
Maybe you can use that.
Arne