Re: Parsing HTML

Tue, 27 May 2025 17:08:55 +0000, /Olivier Cailloux/:

> Can anyone point me towards some way of reading HTML (non XML) files 
> using Xerces-J? I tried various things using 
> org.apache.xerces.parsers.DOMParserImpl but parsing this file for 
> example (valid according to Nu validator) fails.

Haven't used it myself – have you tried NekoHTML?

* https://nekohtml.sourceforge.net/
* https://central.sonatype.com/artifact/net.sourceforge.nekohtml/nekohtml

> I am ready to use a way that does not follow the W3C bootstrapping 
> one, if required.

Using the TagSoup parser:

* 
https://web.archive.org/web/20160815081758/http://home.ccil.org/~cowan/XML/tagsoup/
* https://central.sonatype.com/artifact/org.ccil.cowan.tagsoup/tagsoup

The following (non-Xerces-specific) appears to work for me:

     import javax.xml.transform.Transformer;
     import javax.xml.transform.TransformerFactory;
     import javax.xml.transform.dom.DOMResult;
     import javax.xml.transform.sax.SAXSource;

     import org.xml.sax.InputSource;
     import org.w3c.dom.Document;
     import org.ccil.cowan.tagsoup.Parser;

     public static void main(String[] args) throws Exception {
         TransformerFactory tf = TransformerFactory.newInstance();
         Transformer identity = tf.newTransformer();

         SAXSource source = new SAXSource(new Parser(), new InputSource(
  
"https://raw.githubusercontent.com/oliviercailloux/JARiS/refs/heads/main/src/test/resources/io/github/oliviercailloux/jaris/xml/Html/Simple.html"));
         DOMResult result = new DOMResult();
         identity.transform(source, result);

         Document doc = (Document) result.getNode();
         System.out.println(doc.getDocumentElement().getTagName());
         System.out.println(doc.getDocumentElement().getNamespaceURI());
         System.out.println(doc
                 .getElementsByTagName("meta").getLength());
     }

-- 
Stanimir