Liferay is easy: Developing a MVCPortlet with Multiple Actions in Liferay

Today we will discuss how to develop a MVCPortlet with multiple action methods in Liferay. Here we create a portlet that contain two action methods with simple message.So lets start this step by step:-

Step 1:-Create Liferay Plugin Project
Click on File -->New -->Liferay plugin project. A screen will appear

Provide the Project name and Select Plugin Type as Portlet and click finish.

Step 2:-Create Portlet in Project
In package explorer Right click on project --> New --> Liferay Portlet

provide class name, package and select SuperClass as MVCPortlet.

Step 3:-Change view.jsp
Open view.jsp and paste this content:-

view.jsp

	<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
	<portlet:defineObjects />

	<!-- Action URLs -->
	<portlet:actionURL var="firstActionURL" name="firstMethod" />
	<portlet:actionURL var="secondActionURL" name="secondMethod" />

	<h4>First Form</h4>
	<form action="<%=firstActionURL%>" method="POST">
	First :-<input type="text" name='<portlet:namespace/>first'>
	<input type="submit" value="SUBMIT">
	</form>

	<h4>Second Form</h4>
	<form action="<%=secondActionURL%>" method="POST">
	Second :-<input type="text" name='<portlet:namespace/>second'>
	<input type="submit" value="SUBMIT">
	</form>

view raw view.jsp hosted with ❤ by GitHub

Explanation:-
Here we simply create two actionURLs and two forms. Each actionURL is associated with a form.

Step 4:-Change the Controller
Open your java class and paste this:-

Demo.java

	package com.demo;

	import java.io.IOException;
	import javax.portlet.ActionRequest;
	import javax.portlet.ActionResponse;
	import javax.portlet.PortletException;
	import com.liferay.portal.kernel.util.ParamUtil;
	import com.liferay.util.bridges.mvc.MVCPortlet;

	public class Demo extends MVCPortlet {

	public void firstMethod(ActionRequest request,ActionResponse response) throws IOException, PortletException {
	String first = ParamUtil.getString(request, "first");
	System.out.println("First=>"+first);
	}

	public void secondMethod(ActionRequest request,ActionResponse response) throws IOException, PortletException {
	String second = ParamUtil.getString(request, "second");
	System.out.println("second=>"+second);
	}

	}

view raw Demo.java hosted with ❤ by GitHub

Explanation:-
Here we create two method each method handle one form. The name of the methods must be same in the name variable in actionURL creation. Ex:-
<portlet:actionURL var="firstActionURL" name="firstMethod" />
so first form is handle by firstMethod.