You may modularize your Java application using modules for better scalability and code maintainability, create Spring Boot Multi-Module project and you can include other modules such as OSGi bundles or utility modules.

01 – Initialize the project

02 – Create the main module

03 – Run project with Tomcat

04 – Create the second module

05 – Adding static resources

06 – Adding application.properties file

07 – How to fast update class changes

08 – How to create deployable war

09 – Remove the module from the project

10 – Import module to project

11 – Ignore-Unignore module from the project

12 – Common module for all modules

13 – Deploy to external Tomcat using ANT and Maven and start debugging with Intellij Idea