Java Struts 1: forward from action to action. Passing data through ActionForms

Question

We\'ve been trying to redirect from one action to another, hoping that data would be passed between corresponding ActionForm beans. The first action receives a requ

Answer 1

Sounds like this could get messy, I'd keep this simple and use the ActionForm only to store Request data.

public class FormA extends ActionForm {
    public int intA;
    public int commonInt;
}

Once the Request has been submitted take the data out of the ActionForm and stuff it into the session somewhere, either directly, or into a data holder within the session to maintain this kind of information.

public class ActionTo extends DispatchableAction {
  public ActionForward recv(ActionMapping mapping, ActionForm form, HttpServletRequest request,HttpServletResponse response) {
    FormA form = (FormA)form;

    DataHolder dataHolder = request.getSession().getAttribute("dataHolder");
    dataHolder.setCommonInt(commonInt);
    dataHolder.setIntA(intA);

    return mapping.findForward("send");
  }
}

Ideally, if you're not heavily invested in Struts 1 I'd take a look at Struts 2.

Answer 2

Tom, using you solution and combining with ActionRedirect, suggested by Vincent Ramdhanie, I got what you wanted too.

The code is simple as that and it allow you to have separated Forms for each Action.

ActionRedirect redirect = new ActionRedirect(mapping.findForward("send"));
redirect.addParameter("commonInt", formA.getCommonInt());
return redirect;

formB.setCommonInt(request.getParameter("commonInt"));

This endend up saving my day and helping me not to have the effort to change that directly in the JSP, what would be awful.

Answer 3

The way to accomplish this is to use the same actionform for both actions. Is there a specific reason why you need two different actionforms? If not try modifying the second action mapping to name="formA" and the action itself to use FormA rather than FormB.