Use Contains in Conditions in XPath

XML File

Create new package named data. In this package, create new xml file named products.xml as below:

<?xml version="1.0" encoding="UTF-8"?>
<products>
	<product>
		<id>p01</id>
		<name>name 1</name>
		<price currency="usd">20</price>
		<quantity>5</quantity>
		<weight unit="kg">2.1</weight>
		<date format="dd/MM/yyyy">02/03/2017</date>
		<status>true</status>
	</product>
	<product>
		<id>p02</id>
		<name>name 2</name>
		<price currency="eur">12</price>
		<quantity>3</quantity>
		<weight unit="kg">6.5</weight>
		<date format="dd/MM/yyyy">24/11/2018</date>
		<status>true</status>
	</product>
	<product>
		<id>p03</id>
		<name>name 3</name>
		<price currency="aud">13</price>
		<quantity>1</quantity>
		<weight unit="kg">7.8</weight>
		<date format="dd/MM/yyyy">14/10/2018</date>
		<status>false</status>
	</product>
</products>

Run Application

Create new package, named demo. In this package, create new java class, named Main as below

package demo;

import java.text.SimpleDateFormat;
import java.util.Date;
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.Node;
import org.w3c.dom.NodeList;

public class Main {

	private static void search(String keyword) {
		try {
			SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd/MM/yyyy");
			SimpleDateFormat simpleDateFormat2 = new SimpleDateFormat("yyyy-MM-dd");
			DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
			DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
			Document document = documentBuilder.parse("src\\data\\products.xml");
			XPath xpath = XPathFactory.newInstance().newXPath();
			XPathExpression xPathExpression = xpath.compile("//product[contains(name, '" + keyword + "')]");
			NodeList products = (NodeList) xPathExpression.evaluate(document, XPathConstants.NODESET);
			System.out.println("Count Product: " + products.getLength());
			for (int i = 0; i < products.getLength(); i++) {
				Node node = products.item(i);

				String id = xpath.compile("./id").evaluate(node);
				System.out.println("Id: " + id);

				String name = xpath.compile("./name").evaluate(node);
				System.out.println("Name: " + name);

				double price = Double.parseDouble(xpath.compile("./price").evaluate(node));
				System.out.println("Price: " + price);
				String currencyAttr = xpath.compile("./price/@currency").evaluate(node);
				System.out.println("\tCurrency: " + currencyAttr);

				int quantity = Integer.parseInt(xpath.compile("./quantity").evaluate(node));
				System.out.println("Quantity: " + quantity);

				double weight = Double.parseDouble(xpath.compile("./weight").evaluate(node));
				System.out.println("Weight: " + weight);
				String unitAttr = xpath.compile("./weight/@unit").evaluate(node);
				System.out.println("\tUnit: " + unitAttr);

				Date date = simpleDateFormat.parse(xpath.compile("./date").evaluate(node));
				System.out.println("Date: " + simpleDateFormat2.format(date));
				String formatAttr = xpath.compile("./date/@format").evaluate(node);
				System.out.println("\tFormat: " + formatAttr);

				boolean status = Boolean.parseBoolean(xpath.compile("./status").evaluate(node));
				System.out.println("Status: " + status);

				System.out.println("=============================");
			}
		} catch (Exception e) {
			System.err.println(e.getMessage());
		}
	}

	public static void main(String[] args) {

		search("name");

	}

}

Output

Count Product: 3
Id: p01
Name: name 1
Price: 20.0
	Currency: usd
Quantity: 5
Weight: 2.1
	Unit: kg
Date: 2017-03-02
	Format: dd/MM/yyyy
Status: true
=============================
Id: p02
Name: name 2
Price: 12.0
	Currency: eur
Quantity: 3
Weight: 6.5
	Unit: kg
Date: 2018-11-24
	Format: dd/MM/yyyy
Status: true
=============================
Id: p03
Name: name 3
Price: 13.0
	Currency: aud
Quantity: 1
Weight: 7.8
	Unit: kg
Date: 2018-10-14
	Format: dd/MM/yyyy
Status: false
=============================