Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.ByteArrayInputStream;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathFactory;

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

public class Main {
    public static void main(String[] args) throws Exception {

        String xml = "<metadata><codes class = 'class1'>" + "<code code='ABC'>" + "<detail x='blah blah'/>"
                + "</code>" + "</codes>" + "<codes class = 'class2'>" + "<code code = '123'>"
                + "<detail x='blah blah'/></code></codes></metadata>";

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        Document doc = db.parse(new ByteArrayInputStream(xml.getBytes()));

        XPath xPath = XPathFactory.newInstance().newXPath();
        XPathExpression expr = xPath.compile("//codes/code[@code ='ABC']");
        Object result = expr.evaluate(doc, XPathConstants.NODESET);

        NodeList nodes = (NodeList) result;
        System.out.println(nodes.getLength() > 0 ? "Yes" : "No");
        for (int i = 0; i < nodes.getLength(); i++) {
            System.out.println("nodes: " + nodes.item(i).getNodeValue());
        }
    }
}