Modify attributes in xml file

Question

<?xml version="1.0" encoding="UTF-8"?>
<suite name="Test Suite Name" parallel="none">
<listeners>
    <listener class-name="testng.MyListener"></listener>
</listeners>
  <test name="Test localhost">
    <parameter name="Browser" value="chrome"/> <!-- chrome or firefox or IE or Android Native-->
    <parameter name="url" value='' /> <!-- URL of the webpage you want to test -->
    <parameter name="CSV" value="data.csv"/> <!-- Location of the CSV file that you want to run tests with -->
    <parameter name="resultLocation" value="C:\Users\xvdf\Desktop\testmap"/> <!-- TestNG will create two folders in this location, screenshots and test-output-datestamp -->
    <parameter name="runType" value="baseline" /> <!--  actual or baseline . baseline = first run. actual is second run, to do a compare for example -->
    <classes>
      <class name="testng.runTest"></class>
    </classes>
  </test> <!-- Test CAN YOU SEE THIS?-->
</suite> <!-- Suite end of suite -->

I am trying to edit this XML so I can change 2 parameters, resultLocation and runType. So far I have tried a few things with the DocumentBuilder, but I cant see to get it to find the attributes. This is the code I have tried so far. The first part works, I can get to the test element.

package testng;

import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class ModifyXMLFile {

    public static void main(String argv[]) {

       try {
        String filepath = "testng.xml";
        DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
        Document doc = null;
        try {
            doc = docBuilder.parse(filepath);
        } catch (SAXException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        // Get the root element
        Node suite = doc.getFirstChild();
        Node test = suite.getFirstChild().getNextSibling().getNextSibling().getNextSibling();
        System.out.println(test);
        NamedNodeMap testName = test.getAttributes();
        Node nsdf = testName.getNamedItem("name");
        if(nsdf.getNodeValue().equals("Test localhost")){
            System.out.println("Found Element!");
        }//This actually works.

        Node loc = test.getFirstChild().getNextSibling().getNextSibling();
        System.out.println(loc);
        NamedNodeMap sdf = loc.getAttributes();
        Node as = sdf.getNamedItem("Browser");
        if(as.getNodeValue().equals("chrome")){
            System.out.println("Browser found!");
        }
       } catch (ParserConfigurationException pce) {
        pce.printStackTrace();
       }
    }
}

Can you please show us (here or by a pastbin link) the output/errors of your program ? — 0xmax
– 0xmax, Commented Jan 14, 2015 at 16:36
Here is a tutorial, hope it'll help : journaldev.com/901/how-to-edit-xml-file-in-java-dom-parser — 0xmax
– 0xmax, Commented Jan 14, 2015 at 16:39
Why dont you use either getElementsByTagName to get the elements first (rather than chaining lots of getNextSibling methods) or use XPath to do it. — Zyga
– Zyga, Commented Jan 14, 2015 at 16:42

VirtualTroll · Accepted Answer · 2015-01-14 17:37:05Z

3

Seems like a homework of some kind so not gonna give you full source but below snippet takes care of the first parameter you want to change. Its cleaner than your attempted solution and more resistant to XML structure changes. You can use it to do the same thing for second parameter.

XPath xp = XPathFactory.newInstance().newXPath();
Element node = (Element) xp.evaluate("//test/parameter[@name='resultLocation']", 
                    doc, XPathConstants.NODE);
node.setAttribute("name", "new attribute value");

edited Jan 14, 2015 at 17:37

VirtualTroll

3,1091 gold badge32 silver badges48 bronze badges

answered Jan 14, 2015 at 17:00

Zyga

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