Remove namespace from XML in Java

Question

I want to remove namespace from XML in Java. Can you pls guide on what needs to be done. Can use DOM parser but that would be a node by node parsing. I want to know if there

Answer 1

You can use xslt for that. Try

removeNs.xslt

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="xml" indent="yes" />

    <xsl:template match="*">
        <xsl:element name="{local-name(.)}">
            <xsl:apply-templates select="@* | node()" />
        </xsl:element>
    </xsl:template>
    <xsl:template match="@*">
        <xsl:attribute name="{local-name(.)}">
      <xsl:value-of select="." />
    </xsl:attribute>
    </xsl:template>
</xsl:stylesheet>

Sample.java

import java.io.File;

import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

public class Sample {

    public static void main(String[] args) {
        try{
            TransformerFactory factory = TransformerFactory.newInstance();
        Source xslt = new StreamSource(new File("removeNs.xslt"));
        Transformer transformer = factory.newTransformer(xslt);

        Source text = new StreamSource(new File("data.xml"));
        transformer.transform(text, new StreamResult(new File("output.xml")));
        System.out.println("Done");
        } catch (TransformerConfigurationException e) {
            e.printStackTrace();
        } catch (TransformerException e) {
            e.printStackTrace();
        }
    }

}

Answer 2

Regex can be used for more information refer this

public static string RemoveAllXmlNamespace(string xmlData)
        {
            string xmlnsPattern = "\\s+xmlns\\s*(:\\w)?\\s*=\\s*\\\"(?<url>[^\\\"]*)\\\"";
            MatchCollection matchCol = Regex.Matches(xmlData, xmlnsPattern);

            foreach (Match m in matchCol)
            {
                xmlData = xmlData.Replace(m.ToString(), "");
            }
            return xmlData;
        }
   }

You can find a similar example here

Regex can be painful. you can also use this api (dom) to get rid of all namespaces.refer this

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

    ...

    /**
     * Recursively renames the namespace of a node.
     * @param node the starting node.
     * @param namespace the new namespace. Supplying <tt>null</tt> removes the namespace.
     */
    public static void renameNamespaceRecursive(Node node, String namespace) {
        Document document = node.getOwnerDocument();
        if (node.getNodeType() == Node.ELEMENT_NODE) {
            document.renameNode(node, namespace, node.getNodeName());
        }
        NodeList list = node.getChildNodes();
        for (int i = 0; i < list.getLength(); ++i) {
            renameNamespaceRecursive(list.item(i), namespace);
        }
    }