No one has mentioned the fact that when using the <jsp:useBean...> tags, the
properties of beans that have names that match CGI/form parameters, get
auto-magically set. Saves having to use request.getParameter() to get the
parameters' values, although I can imagine some subtle application bugs when
an unintentional clash of names occurs...
Steve S
> -----Original Message-----
> From: A mailing list about Java Server Pages specification
> and reference
> [mailto:[EMAIL PROTECTED]]On Behalf Of Matt Krevs
> Sent: 06 December 1999 22:11
> To: [EMAIL PROTECTED]
> Subject: Re: What's the use of [<jsp:useBean> tag]?
>
>
> Maybe one of the things we are all missing is that most of us
> on this forum
> (I assume) are programmers and are used to seeing java code
> embedded in
> things. Consider for a second that one major reason JSP was
> developed was to
> separate presentation from business logic. One advantage of
> the usebean tag
> provides a HTMLish tag that non-programmers can more easily
> use in their
> HTML.
>
> Granted it may be fairly simple for Java programmers to simply use
> <% MyBean mybean = new MyBean() ;
> mybean.setSomeVar( "somevalue" ) ; %>
>
> instead of
>
> <jsp:useBean...>?
>
> but the useBean tag is much easier to use for non-programmers.
>
> I guess another possibly more important reason to use the
> useBean tag is
> that it hides the specific implementation of 'bean' scoping from the
> programmer. What happens if suddenly, behind the scenes, the way that
> application scope beans are stored/retrieved is changed in a
> future JSP
> release or implementation? If you have hardcoded java code in
> your JSP pages
> (eg getServletContext().setAttribute( key, value ) ) then
> chances are you
> have a very large search/replace task on your hands. If you
> instead used the
> 'usebean' tag then you dont have anything to worry about.
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