Yis-Shi Lee wrote:
> Below is the code I used to call jsp but it didn't work with Jrun2.3.3.
> How to resolve this question?
>
> req.setAttribute("userInfo",rs);
> RequestDispatcher dispatcher;
> dispatcher = getServletContext().getRequestDispatcher("SearchResult.jsp");
> dispatcher.include(req, res);
> ----
> error message
>
> <head><title>JRun Servlet Error</title></head>
> <h1>500 Internal Server Error</h1><body>
> <PRE>
> <B>com.livesoftware.jsp.JSPServlet:</B>
>
> java.lang.NullPointerException
> </PRE>
> <p>
> </body>
>
> Thanks for help
>
There are two issues:
* According to the API documentation, the argument to getRequestDispatcher
needs to start with a slash, and be interpreted as relative to the servlet
context your app is running in. Try this instead:
dispatcher = getServletContext().getRequestDispatcher("/SearchResult.jsp");
* According to the API documentation, getRequestDispatcher() is allowed to
return null. However, your code does not check for this case, so the NPE
is your code's fault. Try this instead:
if (dispatcher != null) {
dispatcher.include(req, res);
} else {
... report the error, or ignore, as appropriate ...
}
I don't use JRun, so there might be other JRun specific issues as well, but you need
to address these two.
Craig McClanahan
>
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