Pablojim Pablojim - 1 year ago 57
Java Question

What's a simple way in java to evaluate an xpath on a string and return a result string

A simple answer needed to a simple question.

For example:

String xml = "<car><manufacturer>toyota</manufacturer></car>";
String xpath = "/car/manufacturer";
assertEquals("toyota",evaluate(xml, xpath));

How can I write the evaluate method in simple and readable way that will work for any given well-formed xml and xpath.

Obviously there are loads of ways this can be achieved but the majority seem very verbose.

Any simple ways I'm missing/libraries that can achieve this?

For cases where multiple nodes are returned I just want the string representation of this.

Answer Source

Here you go, the following can be done with Java SE:

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactory;
import org.xml.sax.InputSource;

public class Demo {

    public static void main(String[] args) throws Exception {
        String xml = "<car><manufacturer>toyota</manufacturer></car>";
        String xpath = "/car/manufacturer";
        XPath xPath = XPathFactory.newInstance().newXPath();
        assertEquals("toyota",xPath.evaluate(xpath, new InputSource(new StringReader(xml))));