I'm interested in some feedback on the following:
I prefer to develop web applications using a page-centric model. I like the
simplicity of one JSP <-> one Java class for the view layer (not the model).
Struts, with its separate Action and ActionForm classes, tends toward at least
two Java classes for a JSP: an Action, and an ActionForm. This tends toward a
multiplicity of Java classes. (I know it's possible to share a single
ActionForm and Action for multiple JSP's, but I'm looking for a simpler
approach.)
I would like to create a generic Action class that delegates request processing
to a SimpleActionForm, like this:
public abstract class SimpleActionForm extends ActionForm {
public abstract ActionForward execute(
ActionMapping mapping,
HttpServletRequest request,
HttpServletResponse response) throws Exception;
}
public class SimpleAction extends Action {
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
SimpleActionForm bean = (SimpleActionForm)form;
return bean.execute(mapping, request, response);
}
}
With this approach, most JSP pages could have a single Java class -- a
SimpleActionForm subclass that handles both validation and processing for the
page:
public class LoginForm extends SimpleActionForm {
private String username;
private String password;
... getter and setter methods ...
public abstract ActionForward execute(
ActionMapping mapping,
HttpServletRequest request,
HttpServletResponse response) throws Exception {
... Login processing ...
}
public ActionErrors validate(ActionMapping mapping, HttpServletRequest
req) {
... validation code ...
}
}
Then, in my struts-config.xml file, most form beans would extend the
SimpleActionForm, and most actions would use the SimpleAction type:
<form-beans>
<form-bean name="loginform" type="LoginForm" /> <!-- extends
SimpleActionForm -->
</form-beans>
<action path="/login" type="SimpleAction" name="loginform" scope="request"
validate="true" input="/login.jsp">
...
</action>
I don't have a lot of experience with Struts, so I'm interested on feedback
about this approach. Is it a good/bad idea? If bad, why?
Thanks in advance,
Stephen
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