logoutaction.java

网上商城

package store;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public class LogoutAction extends Action {
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
      throws Exception {
       HttpSession session=request.getSession(false);
       String pageForward="";
        try{
         if(!session.isNew()){
           session.invalidate();
           pageForward="default";
          }
          else{
            pageForward="default";
          }
        }
        catch(Exception e){
          pageForward="error";
        }
        return mapping.findForward(pageForward);
       }
}