Jim,
Since your JSP thinks something is null, have you tried putting something
like the below code in your RetrieveFormAction.execute() method before you
do your request.setAttribute(...) call?
if ( result == null ) {
System.out.println("Result set is NULL!");
} else {
System.out.println("Result has " + result.size() + " items.");
}
OR, in your JSP, have you added similar code to the below?
<%
ArrayList forms = (ArrayList)request.getAttribute("forms");
if ( forms == null ) {
out.println("I am a null form, help!");
} else {
out.println("Forms exists, let's see the data.<br />");
Iterator it = forms.iterator();
while(it.hasNext()) {
out.print("<br>try " + it.next());
}
}
%>
I'm big on echo printing where debugging null pointers are concerned. :)
Regards,
David
-----Original Message-----
From: Jim Douglas [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 15, 2004 11:26 PM
To: [EMAIL PROTECTED]
Subject: RE: Mapping issue
David,
Yes, struts-conf is in WEB-INF,
Here's the application error log, apparently it's finding the for.jsp before
crashing,
DEBUG - insert page='/portal/forms.jsp'.
DEBUG - servletPath=/portal/forms.jsp, pathInfo=null, queryString=null,
name=null
DEBUG - Path Based Include
INFO - default: DefaultServlet.serveResource: Serving resource
'/images/id_nav_outside.gif' headers and data
INFO - default: DefaultServlet.serveResource: Serving resource
'/images/id_nav_bkgnd.gif' headers and data
ERROR - Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at
org.apache.jsp.portal.forms_jsp._jspService(org.apache.jsp.portal.forms_jsp:
52)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3
25)
This is forms.jsp,
<%@ page import="java.util.*" %>
<html>
<body>
<h1 align="center">Forms Listing</h1>
<p>
<%
ArrayList forms = (ArrayList)request.getAttribute("forms");
Iterator it = forms.iterator();
while(it.hasNext()) {
out.print("<br>try " + it.next());
}
%>
</body>
</html>
...and this is the code that sets the "forms attribute,
public final class RetrieveFormAction extends Action {
private final static Logger log =
Logger.getLogger(RetrieveFormAction.class);
String sTemp ="";
public ActionForward execute(ActionMapping mapping,
ActionForm form, HttpServletRequest
request,
HttpServletResponse response)
//throws IOException, ServletException {
throws Exception {
ArrayList forms = new ArrayList();
String userName = ((LogonForm) form).getUsername();
DataSource dataSource = getDataSource(request, "userDB");
Connection conn = dataSource.getConnection();
Statement stmt = conn.createStatement();
String query = "SELECT * FROM users";
log.info("query = " + query);
ResultSet rs = stmt.executeQuery(query);
Boolean validate = false;
while (rs.next()) {
sTemp = rs.getString(1);
forms.add(sTemp); }
rs.close();
rs = null;
ArrayList result = forms;
request.setAttribute("forms", result);
return mapping.findForward("show_forms");
}
}
Thanks,
Jim
>From: "David G. Friedman" <[EMAIL PROTECTED]>
>Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
>To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
>Subject: RE: Mapping issue
>Date: Wed, 15 Dec 2004 19:31:14 -0500
>
>Have you checked your application server's log files to see if there were
>any Struts startup errors? Where are you putting the "struts-conf" file?
>Are you putting it in the file "/WEB-INF/struts-config.xml"?
>
>Regards,
>David
>
>-----Original Message-----
>From: Jim Douglas [mailto:[EMAIL PROTECTED]
>Sent: Wednesday, December 15, 2004 7:17 PM
>To: [EMAIL PROTECTED]
>Subject: Mapping issue
>
>
>To all,
>
>This is my error message in the browser,
>
>javax.servlet.ServletException: Cannot retrieve mapping for action
>/SelectUser
>
>The class files are in the right place. This is struts-conf,
>
><form-beans>
> <form-bean name="ReturnStudentForms"
> type="app.model.FormsSelect" />
> </form-beans>
>
><action-mappings>
>
> <action-mappings>
> <action path="/SelectUser"
> type="app.web.RetrieveFormAction"
> name="ReturnStudentForms" scope="request"
> validate="true" input="/portal/user.jsp">
> <forward name="show_forms"
> path="/portal/forms.jsp" />
> </action>
> </action-mappings>
>
>
>Thanks,
>Jim
>
>
>
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