Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.StringReader;
import java.util.Collections;
import java.util.Iterator;

import javax.xml.XMLConstants;
import javax.xml.namespace.NamespaceContext;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactory;

import org.xml.sax.InputSource;

public class Main {
    public static void main(String[] args) throws Exception {
        String source = "<p xmlns='http://www.java2s.com/nfe' versao='2.00'></p>";

        XPathFactory xPathFactory = XPathFactory.newInstance();
        XPath xPath = xPathFactory.newXPath();

        NamespaceContext context = new NamespaceContext() {
            String PREFIX = "nfe";
            String URI = "http://www.java2s.com/nfe";

            @Override
            public String getNamespaceURI(String prefix) {
                return (PREFIX.equals(prefix)) ? URI : XMLConstants.NULL_NS_URI;
            }

            @Override
            public String getPrefix(String namespaceUri) {
                return (URI.equals(namespaceUri)) ? PREFIX : XMLConstants.DEFAULT_NS_PREFIX;
            }

            @Override
            public Iterator getPrefixes(String namespaceUri) {
                return Collections.singletonList(this.getPrefix(namespaceUri)).iterator();
            }
        };
        xPath.setNamespaceContext(context);
        InputSource inputSource = new InputSource(new StringReader(source));
        String versao = xPath.evaluate("//nfe:p/@versao", inputSource);
        System.out.println(versao.toString());
    }
}