Open a JSP/Servlet in dialog box from portlet

In the last few days i talked about what are different options for opening a dialog box from portlet and but all those approaches have there disadvantages. So the easiest option would be to open a dialog box pointing to a Servlet or JSP that resides in same porltet application. THis approach wont work if you need any portlet context but should work otherwise.

I built this sample portlet to demonstrate what i mean. My Sample portlet has a popup.jsp and when ever you click on open popup.jsp button it opens popup.jsp in dialog box, i am passing userName parameter to the JSP. You can download the sample code for portlet from here

THe doView() method of sample portlet forwards control to index.jsp which looks like this

<%@page language="java" contentType="text/html; %>
<%@taglib uri="" prefix="portlet"%>
<%@ taglib uri="" prefix="c" %>
<%@ taglib uri="/WEB-INF/tld/portal.tld" prefix="portal" %>

<portlet:defineObjects />

<script type="text/javascript">
function openPopup(popupUrl){
if (window.showModalDialog) {
} else {,'name',
'height=500,width=500,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes');

<input type="button"
onclick="openPopup('<%=renderResponse.encodeURL(renderRequest.getContextPath() + "/popup.jsp?userName=poup.jsp") %>')"
value="Popup.jsp" />

I am creating URL to a JSP which resides in same portlet application like this renderResponse.encodeURL(renderRequest.getContextPath() + "/popup.jsp?userName=poup.jsp"). I am passing userName as parameter to the popup.jsp, i used a JSP but it can be a servlet

THis is how my poup.jsp looks like

Hello from popup.jsp
<h1><%= request.getParameter("userName") %></h1>


The popup.jsp is pretty simple, all that it does is read value of userName request parameter and print it in HTML

1 comment:

Anonymous said...

how to open external site open in dialog like 'google'