I am very grateful for the overwhelming help that I
have received.
I followed the advices given by all of you and paid
special attention to possible mis-spelling in forward
mapping. I did not find any mis-spelling or mixing up
of lower case/upper case.
Finally, I re-typed all the key words in the forward
mapping parts of the program. Everything worked - I
got the expected page displayed in the browser.
I still do not have any idea why I got a blank page
last night. I would be more than happy to share my
experience with all of you if I knew the root cause of
the problem. But, I do not know.
-Caroline
--- "Richard J. Duncan" <[EMAIL PROTECTED]> wrote:
> In my experience, this is because your
> execute/perform is returning null as the result of
> findForward("forwardname") not finding anything.
> Usually, this is because I misspelled the forward
> name.
>
> Returning null from execute/perform tells struts
> that your method wrote the response itself.
>
> Regards,
>
> Rich
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, September 30, 2003 3:05 AM
> To: Struts Users Mailing List
> Subject: Re: No Error Message But A Blank Page Is
> Displayed.
>
> Your missing html:form
> > My welcome page "is displayed" as the very first
> > screen without any problem. The page has
> > <logic:present> and <logic:notPresent> tags, which
> > test if any registered user has logged on.
> >
> > The problem occurred after I filled out username,
> and
> > clicked the "Submit" button. Thereafter, the
> welcome
> > page was not shown. My welcome page looks like
> the
> > following:
> >
> > Welcome.jsp
> >
> > <%@ taglib uri="/tags/struts-bean" prefix="bean"
> %>
> > <%@ taglib uri="/tags/struts-html" prefix="html"
> %>
> > <%@ taglib uri="/tags/struts-logic" prefix="logic"
> %>
> > <HTML>
> > <HEAD>
> > <TITLE>Welcome!</TITLE>
> > <html:base/>
> > </HEAD>
> > <BODY>
> > <logic:present name="user">
> > <H3>Welcome <bean:write name="user"
> > property="username"/>!</H3>
> > </logic:present>
> > <logic:notPresent scope="session" name="user">
> > <H3>Welcome World!</H3>
> > </logic:notPresent>
> > <html:errors/>
> > <UL>
> > <LI><html:link forward="logon">Sign
> > in</html:link></LI>
> > <logic:present name="user">
> > <LI><html:link forward="logoff">Sign
> > out</html:link></LI>
> > </logic:present>
> > </UL>
> > <IMG src='struts-power.gif' alt='Powered by
> Struts'>
> > </BODY>
> > </HTML>
> > --- Kwok Peng Tuck <[EMAIL PROTECTED]> wrote:
> >> You might want to put System.out.println("Line
> >> [number]") ; to see
> >> the flow in your action. BTW did you actually put
> >> anything(like hello
> >> world) in Welcome.jsp ?
> >>
> >>
> >> Caroline Jen wrote:
> >>
> >> >Which resource file needs to be updated? I have
> >> >checked the application.properties. Nothing in
> >> that
> >> >file is relevant to my problem.
> >> >--- Abhijeet Mahalkar
> >> ><[EMAIL PROTECTED]> wrote:
> >> >
> >> >
> >> >>have u updated the Resource files... ?
> >> >>abhijeet
> >> >>
> >> >>----- Original Message -----
> >> >>From: "Caroline Jen" <[EMAIL PROTECTED]>
> >> >>To: <[EMAIL PROTECTED]>
> >> >>Sent: Tuesday, September 30, 2003 9:45 AM
> >> >>Subject: No Error Message But A Blank Page Is
> >> >>Displayed.
> >> >>
> >> >>
> >> >>I am experimenting a basic application - logon.
> I
> >> >>got
> >> >>the first two screens working without problem.
> >> >>However, the third screen displays a blank page
> >> (no
> >> >>error message). I am having a very difficult
> time
> >> >>to
> >> >>figure out the problem; henceforth, seeking
> help.
> >> >>Here is the history of my application:
> >> >>
> >> >>1.
> http://localhost:8080/LogonPractice/index.jsp
> >> (no
> >> >>problem and I clicked on "Sign in")
> >> >>2.
> >> >>
> >> >>
> >> >>
> >>
>
>>http://localhost:8080/LogonPractice/Logon.do;jsessionid=170B50E4D8E07EE36290E98342E8BF9C
> >> >
> >> >
> >> >>(no problem and the screen asked for username
> and
> >> >>password. I filled out the information and
> >> clicked
> >> >>on
> >> >>"Submit")
> >> >>3.
> >>
> >>http://localhost:8080/LogonPractice/LogonSubmit.do
> >> >>(displayed a blank page)
> >> >>
> >> >>The Tomcat log file shows the following (no
> error
> >> >>message at all):
> >> >>
> >> >>2003-09-29 23:29:26 action: Processing a GET
> for
> >> >>/Logon
> >> >>2003-09-29 23:29:26 action: Looking for Action
> >> >>instance for class
> >> >>org.apache.struts.actions.ForwardAction
> >> >>2003-09-29 23:29:26 action: Double checking
> for
> >> >>Action instance already there
> >> >>2003-09-29 23:29:26 action: Creating new
> Action
> >> >>instance
> >> >>2003-09-29 23:29:35 action: Processing a POST
> for
> >> >>/LogonSubmit
> >> >>2003-09-29 23:29:35 action: Looking for
> >> ActionForm
> >> >>bean under attribute 'logonForm'
> >> >>2003-09-29 23:29:35 action: Creating new
> >> ActionForm
> >> >>instance of class
> >> >>'org.apache.artimus.logon.LogonForm'
> >> >>2003-09-29 23:29:35 action: Storing instance
> >> under
> >> >>attribute 'logonForm' in scope 'request'
> >> >>2003-09-29 23:29:35 action: Populating bean
> >> >>properties from this request
> >> >>2003-09-29 23:29:35 action: Validating input
> form
> >> >>properties
> >> >>2003-09-29 23:29:35 action: No errors
> detected,
> >> >>accepting input
> >> >>2003-09-29 23:29:35 action: Looking for Action
> >> >>instance for class
> >> >>org.apache.artimus.logon.LogonAction
> >> >>2003-09-29 23:29:35 action: Double checking
> for
> >> >>Action instance already there
> >> >>2003-09-29 23:29:35 action: Creating new
> Action
> >> >>instance
> >> >>
> >> >>in my struts-config.xml, I have:
> >> >>
> >> >> <action
> >> >> path="/LogonSubmit"
> >> >>
> >> >>type="org.apache.artimus.logon.LogonAction"
> >> >> name="logonForm"
> >> >> scope="request"
> >> >> validate="true"
> >> >> input="/signin/Logon.jsp">
> >> >> <forward
> >> >> name="valid"
> >> >> path="/signin/Welcome.jsp"/>
> >> >> </action>
> >> >>
> >> >>and my LogonAction.java is:
> >> >>
> >> >>package org.apache.artimus.logon;
> >> >>
> >> >>import java.io.IOException;
> >> >>import javax.servlet.ServletException;
>
=== message truncated ===
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