StAXTest.java Source code

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Here is the source code for StAXTest.java

Source

/*
   This program is a part of the companion code for Core Java 8th ed.
   (http://horstmann.com/corejava)
    
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
    
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
    
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import java.io.InputStream;
import java.net.URL;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;

/**
 * This program demonstrates how to use a StAX parser. The program prints all hyperlinks links of an
 * XHTML web page. <br>
 * Usage: java StAXTest url
 * @author Cay Horstmann
 * @version 1.0 2007-06-23
 */
public class StAXTest {
    public static void main(String[] args) throws Exception {
        String urlString;
        if (args.length == 0) {
            urlString = "http://www.w3c.org";
            System.out.println("Using " + urlString);
        } else
            urlString = args[0];
        URL url = new URL(urlString);
        InputStream in = url.openStream();
        XMLInputFactory factory = XMLInputFactory.newInstance();
        XMLStreamReader parser = factory.createXMLStreamReader(in);
        while (parser.hasNext()) {
            int event = parser.next();
            if (event == XMLStreamConstants.START_ELEMENT) {
                if (parser.getLocalName().equals("a")) {
                    String href = parser.getAttributeValue(null, "href");
                    if (href != null)
                        System.out.println(href);
                }
            }
        }
    }
}