tomcat-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jerry Thomas" <jerry_tho...@hotmail.com>
Subject RE: Passing parameters to a bean from a JSP
Date Mon, 03 Apr 2000 18:17:29 GMT

The request.getParameterNames() comes back with no values. Is there 
something I need to do to initialize the request object?

>Try
>
>     String parString = request.getParameter("nameOfFormItem"); //Use this 
>to
>get the values of individual form items.
>
>
><% //Use this to list all the form items and their values.
>     Enumeration enum = request.getParameterNames(); //Put all parameters
>into an enumeration object
>     while (enum.hasMoreElements()) //Iterate throught the enumeration.
>     {
>       String paramName = (String) enum.nextElement(); //Get the name of 
>the
>next parameter
>       out.println(paramName + ":" + request.getParameter(paramName) +
>"<br>"); //Get the value of the parameter and print it to the screen
>     };
>%>
>
>That's what we use with Tomcat 3.0 and 3.1 and they work great.
>
>Cheers
>Scott Petersen
>Programmer/Analyst
>Pangaea Systems
>speterse@pangaea.ca
>250-360-0111
>
> >
> > The request.getParameterNames() and request.ParameterValues()
> > are returning
> > null. I am pulling values from the FORM using JavaScript so I
> > know that the
> > fields are there and that they have values. How do I
> > initialize the request
> > object so that I can pull FORM values from it?
> >
> >
> > >
> > >Your FORM parameters and INPUT fileds are sent to your JSP
> > in the same
> > >way that they are to a Servlet (after all your JSP are compiled into
> > >Servlets by the server). There's a HttpServletRequest object named
> > >'request' accesible in your JSP code through which you can
> > extract the
> > >values of every parameter and INPUT field of the FORM
> > submitted by the
> > >user. Check the Java API for the HttpServletRequest class.
> > >
> > >Jerry Thomas wrote:
> > > >
> > > > How do I extract data from a FORM and assign the data to
> > a Java variable
> > > > that I have declared on my JSP?
> > > >
> > > > > >
> > > > > > I have data contained in a JavaScript variable that
> > would like to
> > >pass
> > > > >to a
> > > > > > method on my Java bean. I have been successful
> > retrieving data from
> > >my
> > > > >bean
> > > > > > into my JSP but I cannot figure out how to format the
> > script so that
> > >I
> > > > >can
> > > > > > send data back to my bean through its methods.
> > > >
> > > > >You can pass parameters as FORM hidden fields that can
> > be extracted
> > >from
> > > > >a
> > > > >servlet and finally passed through to the Bean. This is
> > independent
> > >from
> > > > >the cookie policy set at the browser.
> > > > >
> > > > >Juan Alvarez Ferrando
> > > > >

______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com


Mime
View raw message