Redirect to render after submit

Redirect to render after submit

String portletName = (String)actionRequest.getAttribute(WebKeys.PORTLET_ID);
ThemeDisplay themeDisplay = (ThemeDisplay) actionRequest.getAttribute(WebKeys.THEME_DISPLAY);
PortletURL redirectURL = PortletURLFactoryUtil.create(PortalUtil.getHttpServletRequest(actionRequest),portletName,
                        themeDisplay.getLayout().getPlid(), PortletRequest.RENDER_PHASE);
redirectURL.setParameter("parameter", "value"); // set required parameter that you need in doView or render Method
actionResponse.sendRedirect(redirectURL.toString());