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From "Jim Urban" <jim.ur...@netsteps.net>
Subject RE: Problem with Tomcat or Servlet?
Date Fri, 01 Mar 2002 16:04:09 GMT
Stephan,

I don't see any glaring errors in this code, granted chtml, your statement
and any of the columns returned by your result set are not null.  You need
to compile your application with debug (-g) so you can examine the stack
trace produced by the exception.  This will at least show you what line is
causing the problem and should lead you to the bug.

Jim

> -----Original Message-----
> From: Stephan Mülhaus [mailto:smu@nwu.net]
> Sent: Friday, March 01, 2002 8:52 AM
> To: Tomcat Users List
> Subject: RE: Problem with Tomcat or Servlet?
>
>
> okay, here is the part that builds the list:
>
> //My Query to get all records from my table
> r = s.executeQuery("SELECT * FROM fahrzeuge ORDER BY kaufdatum");
>
> //a loop to parse the content of my records in my htmlpage
> //chtml is my htmlpage as a String
> //helpers.StrTran is a method to replace my placeholder in the htmlpage
> with the String of my table
> while(r.next()){
>                  chtml =
> helpers.StrTran(chtml,"-CAR-",r.getString("car"));
>                  chtml =
> helpers.StrTran(chtml,"-PRODUCER-",r.getString("producer"));
>                  chtml =
> helpers.StrTran(chtml,"-COLOR-",r.getString("color"));
>                  chtml =
> helpers.StrTran(chtml,"-CODEPLATE-",r.getString("codeplate"));
>                  chtml =
> helpers.StrTranList(chtml,"<!---marker--->",cHtmlList+"<!---marker--->");
> }
> out.println(chtml);
>
> r.close();
> I hope this helps you to solve my prob
>
> At 08:38 01.03.2002 -0600, you wrote:
> >Sounds like a servlet problem.  To determine the cause of your problem we
> >will need to see the servlet source code (at least the part that
> builds the
> >list).
> >
> >Jim
> >
> > > -----Original Message-----
> > > From: Stephan Mülhaus [mailto:smu@nwu.net]
> > > Sent: Friday, March 01, 2002 8:28 AM
> > > To: Tomcat Users List
> > > Subject: Problem with Tomcat or Servlet?
> > >
> > >
> > > Hi everybody,
> > >
> > > i have a strange Problem, i have developed a servlet in which i
> > > can create
> > > new records in a mysql database and where i can list these
> records in a
> > > htmlpage.
> > > Now the strange behaviour:
> > > If i try to get the list of records Tomcat throws an
> NullPointerException
> > > although the source is okay but if i create a new record and let
> > > my servlet
> > > list all my records it shows me all my records!
> > > I couldn't find any strange entries in my logfiles, everything is
> > > normal...
> > > Now, perhaps you can help me, is this a problem of my servlet or
> > > a problem
> > > of my tomcat?
> > >
> > > Thanx in Advance
> > > Stephan
> > >
> > >
> > > --
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> > >
> >
> >
> >--
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>
> --
> ------------------------------------------------------------------
> ----------------------------
>
> Stephan Mülhaus  smu@nwu.net
> NWU Gesellschaft fuer Netzwerk und Kommunikation mbH
> Phone: +49-231-986510 - 0
> FAX: +49-231-986522 - 2
> ------------------------------------------------------------------
> ----------------------------
>
>
>
> --
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