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<?xml version="1.0" encoding="iso-8859-1"?>
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta name="robots" content="index,follow" />
<meta name="keywords" content="Filter Links, PhpWiki" />
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<meta name="document-type" content="Public" />
<meta name="document-rating" content="General" />
<meta name="generator" content="phpWiki" />
<meta name="PHPWIKI_VERSION" content="1.3.4" />
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<link rel="alternate" title="View Source: FilterLinks" href="FilterLinks?action=viewsource&version=3" />
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<!--
body {background-image: url(/wiki/themes/MacOSX/images/bgpaper8.png);}
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<title>PhpWiki - Filter Links</title>
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<div class="wikitext"><p><b>Using a NodeFilter to Extract Links</b></p>
<p>The filter capability is much more powerful than the simple link extraction illustrated here:</p>
<pre>
import org.htmlparser.NodeFilter;
import org.htmlparser.Parser;
import org.htmlparser.filters.NodeClassFilter;
import org.htmlparser.tags.LinkTag;
import org.htmlparser.util.NodeIterator;
import org.htmlparser.util.NodeList;
import org.htmlparser.util.ParserException;
public class LinkDemo
{
public static void main (String[] args) throws ParserException
{
Parser parser = new Parser ("http://urlIWantToParse.com");
NodeFilter filter = new NodeClassFilter (LinkTag.class);
NodeList links = new NodeList ();
for (NodeIterator e = parser.elements (); e.hasMoreNodes (); )
e.nextNode ().collectInto (links, filter);
for (int i = 0; i < links.size (); i++)
{
LinkTag linkTag = (LinkTag)links.elementAt (i);
System.out.print ("\"" + linkTag.getLinkText () + "\" => ");
System.out.println (linkTag.getLink ());
}
}
}</pre>
<p>In fact, this is so useful that there is a convenience method to apply a NodeClassFilter directly from the parser:</p>
<pre>
import org.htmlparser.Parser;
import org.htmlparser.util.ParserException;
import org.htmlparser.Node;
import org.htmlparser.tags.LinkTag;
public class LinkDemo
{
public static void main (String[] args) throws ParserException
{
Parser parser = new Parser ("http://urlIWantToParse.com");
Node [] links = parser.extractAllNodesThatAre (LinkTag.class);
for (int i = 0; i < links.length; i++)
{
LinkTag linkTag = (LinkTag)links[i];
System.out.print ("\"" + linkTag.getLinkText () + "\" => ");
System.out.println (linkTag.getLink ());
}
}
}</pre>
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<span class="debug">Page Execution took 0.283 seconds</span>
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