Java Concepts

Hi, Below is the code ,to create the different types of request URL. As we know in Liferay we have 3 types of URL 1.ActionRequest 2.RenderRequest 3.ResourceRequest. //Create Render URL PortletURL renderURL = PortletURLFactoryUtil.create( actionRequest,PortalUtil.getPortletId(actionRequest), themeDisplay.getLayout().getPlid(), "0"); renderURL.setParameter("customparam","customvalue"); actionResponse.sendRedirect(renderURL.toString()); If you want to create the ActionRequest put 1 instead of 0 in the last argument. We can check the code in the  PortletURLImpl class of liferay if (_lifecycle.equals(PortletRequest.ACTION_PHASE)) { _reservedParameters.put("p_p_lifecycle", "1"); } else if (_lifecycle.equals(PortletRequest.RENDER_PHASE)) {

We often see after submitting the form and refresh the page you will see the same result will be adding in the DB. So how to get rid of this? Here we have 2 options to eliminate this behaviour. 1. By Declaring the tag in the liferay-portlet.xml after <icon> tag           <action-url-redirect> true </action-url-redirect> 2.After doing our logic we can redirect to specified URL by using actionResponse.    actionResponse.sendRedirect(PortalUtil.getLayoutURL(themeDisplay.getLayout(),themeDisplay));   Here we are  redirecting to the friendly url of that page. The above will be redirect to the below URL as                     //group/test/test1----- (group/<your-community-name>/pageName) .