Using prefix as parameter inf a forward within a action mapping

Question

There's any way to use a prefix as a paramter or in the path of a forward like:

????

Answer 1

The code that I put as a example didn't apear, so i'm put it again:

forward name='test' path="/switch.do?page='/test.do'&prefix='test'"

Answer 2

I'm not sure what is meant with prefix, I assume you are referring to the servlet's name. Suppose you have this forward in your struts-config.xml as part of an action mapping:

<forward name="test" path="/switch" />

If you want to get the forwards' names available to your action, you can get them with mapping.findForwards().

If you already have a forward, for example:

ActionForward forward = mapping.findForward("test");

you can get the name of the forward with:

String fwdName = forward.getName(); // returns "test"

and the servlet name or path with:

String servletPath = forward.getPath(); // returns "/switch.do"

you can also get it from the request object:

String servletPath = request.getServletPath();

OK, now, if you want to modify the forward before returning control to Struts, so that you can append extra parameters, you'll need to create a new ActionForward based on one of the forwards defined in your struts-config.xml, like for example:

ActionForward forward = mapping.findForward("test");
StringBuilder path = new StringBuilder(forward.getPath());
path.append("?id=");
path.append(someobject.getId());
return new ActionForward(path.toString(), true); // `true` means "do a redirect"

This would tell Struts to issue a redirect to an URL like /switch.do?id=3

Knowing how to create a new ActionForward, and how to get the names of the forwards and the servlet names they point to, you shouldn't have a problem constructing the forward that you need.