What you suggested would be fine if you want to bang out a whole project in
a perl/hackish fashion. But if you want to be able to reuse code, in your
project and in others the best way to do it is by encapsulating code in
beans.
-----Original Message-----
From: A mailing list about Java Server Pages specification and reference
[mailto:[EMAIL PROTECTED]]On Behalf Of Heiko Gottschling
Sent: Sunday, December 05, 1999 7:10 PM
To: [EMAIL PROTECTED]
Subject: What's the use of beans?
Hi,
I'm wondering what's the use of beans with JSP. In my (humble) opinion,
beans are useless... everything I can do with beans can be done with
"normal" java objects as well.
For example,
<jsp:useBean id="myBean" class="MyBean" scope="session">
can easily be replaced by
<% MyBean myBean = new MyBean();
session.put("myBean", myBean); %>
Moreover, beans obviously have some disadvantages:
- the syntax is very awkward. Instead of writing <jsp:setProperty
name="myBean" property="prop" value="val"> I can write
myBean.setProp("val"), which seems much smoother
- Construction of beans seems to be limitied to using the
(argument-less) standard constructor. Constructors with arguments are
not supported.
- Using <jsp:setProperty>, only String properties can be set. If I want
to set any other properties, I have to access the bean directly anyway.
So, I'd really like to know what's the big deal about beans? I would
rather write my JSP pages without using beans, but I'm wondering if I'm
missing something? What's the reason that beans were introduced to JSP
in the first place? Are there any situations in which the use of beans
provides a real advantage over the "traditional" approach?
thx
Heiko
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