Create a new Maven project as follows:

Edit pom.xml:

<project>

  <modelVersion>4.0.0</modelVersion>

  <groupId>com.acme.samples</groupId>

  <artifactId>hello-portlet</artifactId>

  <version>1.0</version>

  <packaging>war</packaging>

  <build>

    <finalName>hello-portlet</finalName>

  </build>



  <dependencies>

    <dependency>

      <groupId>javax.portlet</groupId>

      <artifactId>portlet-api</artifactId>

      <version>2.0</version>

      <scope>provided</scope>

    </dependency>

  </dependencies>

</project>

Edit web.xml:

<web-app>

  <display-name>hello-portlet</display-name>

</web-app>

Edit HelloPortlet.java:

package com.acme.samples;


import java.io.IOException;


import javax.portlet.GenericPortlet;

import javax.portlet.PortletRequestDispatcher;

import javax.portlet.RenderRequest;

import javax.portlet.RenderResponse;

import javax.portlet.PortletException;

import javax.portlet.RenderMode;


public class HelloPortlet extends GenericPortlet {

  @RenderMode(name = "view")

  public void Hello(RenderRequest request, RenderResponse response) throws IOException, PortletException {

    PortletRequestDispatcher prDispatcher = getPortletContext().getRequestDispatcher("/jsp/hello.jsp");

    prDispatcher.include(request, response);

  }

}

Edit HelloPortlet_en.properties to add language properties:

com.acme.samples.HelloPortlet.Hello=Hello!
com.acme.samples.HelloPortlet.Msg1=This is a portlet example.
com.acme.samples.HelloPortlet.Msg2=Written by a baker.

Edit HelloPortlet_fr.properties to add language properties:

com.acme.samples.HelloPortlet.Hello=Bonjour!
com.acme.samples.HelloPortlet.Msg1=C'est un example de portlet.
com.acme.samples.HelloPortlet.Msg2=Ecrit par un boulanger.

Edit portlet.xml to register supported locale and the resource-bundle:

<portlet-app version="2.0" xmlns="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd"

  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

  xsi:schemaLocation="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd">

  <portlet>

    <portlet-name>Hello</portlet-name>

    <portlet-class>com.acme.samples.HelloPortlet</portlet-class>

    <supports>

      <mime-type>text/html</mime-type>

    </supports>

    <supported-locale>en</supported-locale>

    <resource-bundle>locale.portlet.HelloPortlet.HelloPortlet</resource-bundle>

    <portlet-info>

      <title>Hello</title>

    </portlet-info>

  </portlet>

</portlet-app>

Edit Stylesheet.css:

.HelloPortlet1, .HelloPortlet2, .HelloPortlet3 {

  padding: 10px;

  font-style: italic;

  font-size: 18px;

  width: 400px;

}

.HelloPortlet1 {

  background-color: antiquewhite;

}

.HelloPortlet2 {

  background-color: lemonchiffon;

}

.HelloPortlet3 {

  background-color: wheat;

}

Edit hello.jsp to add language properties:

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

<%@ page import="java.util.ResourceBundle"%>



<portlet:defineObjects />



<%

  String contextPath = request.getContextPath();

  ResourceBundle resource = portletConfig.getResourceBundle(request.getLocale());

%>



<link rel="stylesheet" type="text/css" href="<%=contextPath%>/skin/Stylesheet.css"/>

<div class="HelloPortlet1">

  <span><%=resource.getString("com.acme.samples.HelloPortlet.Hello")%></span>

</div>

<div class="HelloPortlet2">

  <span><%=resource.getString("com.acme.samples.HelloPortlet.Msg1")%></span>

</div>

<div class="HelloPortlet3">

  <span><%=resource.getString("com.acme.samples.HelloPortlet.Msg2")%></span>

</div>