Re: J2EE, Spring, Hibernate, EJB .... what the ???

From:

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>

Newsgroups:

comp.lang.java.programmer

Date:

Tue, 08 Dec 2009 20:24:54 -0500

Message-ID:

<4b1efc61$0$281$14726298@news.sunsite.dk>

swebb99@gmail.com wrote:

I'm a J2SE developer who has been working on gui application forever
and I've decided that I need to learn a bit about the other side of
the fence, what goes on in the server side. The problem I'm having at
the moment is that I just can't see the wood from the tree's. I really
can't figure out what all the different bits of technology are for,
how they fit together, which ones compete. I've seen JSP's, EJB's,
Spring, Hibernate and lots of other technology referred to but I can't
seem to find anything that attempts to give a quick overview of
everything, its place in the world, the pro's/con's and so on.

As far as I can tell at the moment Hibernate hides away the low level
JDBC and relational aspects, EJB also provides similar functionality
but requires a server, Spring is a framework that links various
technology together, JSP are to be used for handling web
pages ........... the is just so much to take in, I really need an
idiots guide just so I can figure out what I really need to read up
on.

Any they say swing is complicated !!!

The entire Java EE stack is pretty big.

1) Very short version:

Hibernate = O/R-Mapper (and can be used in Java SE as well)
Spring = IoC framework (and can be used in Java SE as well)
EJB's = components used in business logic layer
JSP = template system used in presentation layer
Servlet = typically used for controllers in control layer
JCA = adapters for external systems
JSF = component based presentation and control layer build on JSP (and
servlet)

2) Short version

Lookup the above items at Wikipedia.

3) Medium version

Read SUN's Java EE tutorial.

4) Long version.

Download the specs (as PDF files) and read them.

Arne