Recursively looks for a node name and prints specified attribute value

XMLParser.java

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.io.StringReader;
import java.nio.file.Files;
import java.nio.file.Paths;

public class XMLParser {
    public static void main(String[] args) throws Exception {
        if(args == null) throw new Exception("File name is required as argument");
        String fileName = args[0];

        try {
            String xmlString = new String(Files.readAllBytes(Paths.get(fileName)));
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder;

            builder = factory.newDocumentBuilder();
            Document document = builder.parse(new InputSource(new StringReader(xmlString)));

            NodeList nl = document.getDocumentElement().getChildNodes();
            for (int k = 0; k < nl.getLength(); k++) {
                printTags(nl.item(k));
            }
        } catch (ParserConfigurationException | IOException | SAXException e) {
            e.printStackTrace();
        }
    }

    private static void printTags(Node nodes) {
        if (nodes.hasChildNodes() || nodes.getNodeType() != 3) {
            if (nodes.getNodeName().equalsIgnoreCase("Criteria")) {
                if (nodes.getAttributes().getNamedItem("Name").getNodeValue().equalsIgnoreCase("emp.id")) {
                    System.out.println(nodes.getAttributes().getNamedItem("Value").getNodeValue());
                }
            }
            NodeList nl = nodes.getChildNodes();
            for (int j = 0; j < nl.getLength(); j++) printTags(nl.item(j));
        }
    }
}