Model, Interfaces, Persistence, Service, and Webapp archetype
· A Maven archetype for a multi-module project,
which includes model, interfaces, persistence, service and webapp modules
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window four-layers-webapp-archetype-1.0.1-RELEASE.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.