Most applications in the real world will accumulate a large amount of features and code in the long run. Multi-module projects are a good approach to structuring the application without having to go down the complex path of microservices. The following five tips can help to better organize such Spring Boot projects in the long run.
#1 Find a Proper Module Structure
In general, the use of two modules, "base" and "web," is a good starting point for Spring Boot applications. The "base" module describes the basic setup, for example, database settings, and provides utility classes. Standards defined here then apply to all further modules. In "web," all modules are combined, and the executable application is built — our executable "fat jar."