Question

This is driving me mad, and I’ve already sought previous answers here and here, to no avail so far.

I am trying to follow this tutorial, which uses the Rome library for RSS feeds to output feed entries to a JSP using a servlet. I’m using Eclipse, and it won’t recognize a “SyndFeed” class from Rome, even though I have placed the JAR in the project’s build path and the WEB-INF/lib folder. Still says “Undefined Type” for the following code:

<jsp:useBean id="syndFeed" scope="request" type="SyndFeed" />

Above this, I have:

<%@ page import="com.sun.syndication.feed.synd.SyndFeed" %> 
<%@ page import="com.sun.syndication.feed.synd.SyndEntry" %> 
<%@ page import="java.util.Iterator" %> 

My servlet, using Rome, is basically straight from the tutorial:

public class RssServlet1 extends HttpServlet {
    private static final long serialVersionUID = 1L;

    private RequestDispatcher indexJSP;

    @Override
    public void init(ServletConfig config) throws ServletException {
        ServletContext context = config.getServletContext();
        indexJSP = context.getRequestDispatcher("/WebContent/index.jsp");
    }


    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) 
            throws ServletException, IOException {

        URL feedURL = new URL("http://rss.cnn.com/rss/cnn_tech.rss");
        SyndFeedInput syndInput = new SyndFeedInput();
        SyndFeed syndFeed = null;
        XmlReader xmlReader = new XmlReader( feedURL );

        try {
            syndFeed = syndInput.build( xmlReader );
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (FeedException e) {
            e.printStackTrace();
        }

        request.setAttribute("syndFeed", syndFeed);
        indexJSP.forward(request, response);

    }


}

The servlet shows no compiling errors. All imports OK, including from com.sun.syndication.feed.synd.SyndFeed.

I’m at a loss. Thanks in advance for your help!

Answer 1

The class and type attributes of jsp:useBean (these two attributes mean different things; make sure you are using the right one for your needs) expect the fully-qualified class name. Use:

<jsp:useBean id="syndFeed" scope="request" type="com.sun.syndication.feed.synd.SyndFeed" />