SAXTest.java Source code

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Here is the source code for SAXTest.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.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.helpers.DefaultHandler;

/**
 * This program demonstrates how to use a SAX parser. The program prints all hyperlinks links of an
 * XHTML web page. <br>
 * Usage: java SAXTest url
 * @version 1.00 2001-09-29
 * @author Cay Horstmann
 */
public class SAXTest {
    public static void main(String[] args) throws Exception {
        String url;
        if (args.length == 0) {
            url = "http://www.w3c.org";
            System.out.println("Using " + url);
        } else
            url = args[0];

        DefaultHandler handler = new DefaultHandler() {
            public void startElement(String namespaceURI, String lname, String qname, Attributes attrs) {
                if (lname.equals("a") && attrs != null) {
                    for (int i = 0; i < attrs.getLength(); i++) {
                        String aname = attrs.getLocalName(i);
                        if (aname.equals("href"))
                            System.out.println(attrs.getValue(i));
                    }
                }
            }
        };

        SAXParserFactory factory = SAXParserFactory.newInstance();
        factory.setNamespaceAware(true);
        SAXParser saxParser = factory.newSAXParser();
        InputStream in = new URL(url).openStream();
        saxParser.parse(in, handler);
    }
}