Hi,
I work for a Bank in Taiwan. And I used MVC
pattern on my J2EE
application.
I think it is simple and clear. No extra Jar files
will be included.
Here is the concept of my idea:
The http requests contain all information that will be
used in a business
processing.
So pass it to directly to the ActionControlBean(I call
it) which control the
flow of the request.
The view is JSP, and every JSP maps to a
ActionControlBean.
The control ,ActionControlBean, is JavaBean.
The module could be JaveBean or EJB.
In this way, logic will not be mixed up with
presentation. The JSP will look
like this:
=========== View ==============
example.jsp
<%
//new a ActionControlBean and pass the request, and
this is all we have to
do in a jsp. No more code.
//start to processing the data and decide how to
response
exampleActionBean acb = new exampleActionBean();
acb.start(request,response);
%>
<!-- the result of the processing -->
the item is<%=acb.getXxx()%>
=========== Controller ============
exampleActionBean.java
public class exampleActionBean{
private String Xxx = "";//the input field of input
form
private getXxx(){return this.Xxx;}
private void start (HttpServletRequest request,
HttpServletResponse
response){
//write all you control code here
//you can decide whether just return to example.jsp or
just redirect to
another page.
//or you can use any JavaBean to supply service to
finish the process
//at the end of the method it will fill out all the
attributes belong to
this.
}
}
============= Module =============
As for the module I have nothing to say.
Just like JavaBean or EJB is used to do before.
I think in this way no business logic code will be
writen in JSP.
The controller could compose all the service-oriented
compont together.
In this way, a WebApplication will be just like an
pure Java program.
The scriptlet in JSP only helps on how to do a dynamic
presentation, such
as control the color or the location in a page. I
think the scriptlet can do
more
than JSP tag, so just make the best use of scriptlet.
If the page is trying to show data in a table, An
ArrayList would be
returned,which
contain value object of data.
Best Regards,
Chen Jen Yu.
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