Re: How do you get a class attribute from a span tag

From:

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 02 Feb 2011 18:30:50 -0500

Message-ID:

<4d49e920$0$23765$14726298@news.sunsite.dk>

On 02-02-2011 13:12, Daryn wrote:

I am using org.w3c.dom to extract values from some HTML.

Some html with a span tag like this:<SPAN class='item c123'>-</SPAN>

My code is like this:

StringReader reader = new StringReader(html());
        InputSource inputSource = new InputSource(reader);
        SAX2DOM sax2dom = new SAX2DOM();

        Parser tagSoupParser = new Parser();
        tagSoupParser.setContentHandler(sax2dom);
        tagSoupParser.setFeature(Parser.namespacesFeature, false);
        tagSoupParser.parse(inputSource);

        Document document = (Document) sax2dom.getDOM();
        NodeList trElements = document.getElementsByTagName("span");

        Node node = trElements.item(0);

I would like to do something like this:
((Element)node).getAttributes().getNamedItem("class")

But that throws an "com.sun.org.apache.xerces.internal.dom.TextImpl
cannot be cast to org.w3c.dom.Element" exception.

How can I get the value of the class attribute in that span tag?

This:

         String xml = "<SPAN class='item c123'>bla bla</SPAN>";
         DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
         DocumentBuilder db = dbf.newDocumentBuilder();
         Document doc = db.parse(new InputSource(new StringReader(xml )));
         Element elm = (Element)doc.getElementsByTagName("SPAN").item(0);
         System.out.println("content = " +
elm.getFirstChild().getNodeValue());
         System.out.println("class = " + elm.getAttribute("class"));

works here.

Arne