FreeMarker Portlet Template

In this article, you’ll learn how to create a Liferay FreeMarker portlet application as a Liferay module. To create a Liferay FreeMarker portlet application via the command line using Blade CLI or Maven, use one of the commands with the following parameters:

blade create -t freemarker-portlet [-p packageName] [-c className] projectName

or

mvn archetype:generate \
    -DarchetypeGroupId=com.liferay \
    -DarchetypeArtifactId=com.liferay.project.templates.freemarker.portlet \
    -DartifactId=[projectName] \
    -Dpackage=[packageName] \
    -DclassName=[className] \
    -DliferayVersion=7.1

You can also insert the -b maven parameter in the Blade command to generate a Maven project using Blade CLI.

The template for this kind of project is freemarker-portlet. Suppose you want to create a FreeMarker portlet project called my-freemarker-portlet-project with a package name of com.liferay.docs.freemarkerportlet and a class name of MyFreemarkerPortlet. Also, you’d like to create a service of type javax.portlet.Portlet that extends the com.liferay.util.bridges.freemarker.FreeMarkerPortlet class. Here, service means an OSGi service, not a Liferay API. Another way to say service type is to say component type. You could run the following command to accomplish this:

blade create -t freemarker-portlet -p com.liferay.docs.freemarkerportlet -c MyFreemarkerPortlet my-freemarker-portlet-project

or

mvn archetype:generate \
    -DarchetypeGroupId=com.liferay \
    -DarchetypeArtifactId=com.liferay.project.templates.freemarker.portlet \
    -DgroupId=com.liferay \
    -DartifactId=my-freemarker-portlet-project \
    -Dpackage=com.liferay.docs.freemarkerportlet \
    -Dversion=1.0 \
    -DclassName=MyFreemarkerPortlet \
    -Dauthor=Joe Bloggs \
    -DliferayVersion=7.1

After running the Blade command above, your project’s directory structure looks like this:

  • my-freemarker-portlet-project
    • gradle
      • wrapper
        • gradle-wrapper.jar
        • gradle-wrapper.properties
    • src
      • main
        • java
          • com/liferay/docs/freemarkerportlet
            • constants
              • MyFreemarkerPortletKeys.java
            • portlet
              • MyFreemarkerPortlet.java
        • resources
          • content
            • Language.properties
          • META-INF
            • resources
              • css
                • main.scss
          • templates
            • init.ftl
            • view.ftl
    • bnd.bnd
    • build.gradle
    • gradlew

The Maven-generated project includes a pom.xml file and does not include the Gradle-specific files, but otherwise, appears exactly the same.

The generated module is a working application and is deployable to a Liferay Portal instance. To build upon the generated app, modify the project by adding logic and additional files to the folders outlined above.

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