Spring Framework is a layered architecture that's composed of a few modules. All modules are based on the highest point of its core container. These modules give a developer everything they may require for use in the enterprise application development. In any case, developers allowed to pick the highlights they need and dispose of the modules that are of no use.
Modular programming is a software design technique. This separates the functionality of a program into independent modules so that each contains one specific functionality.
Here's a diagram of the Spring architecture:
Spring Framework has about 20 modules, which are grouped into Core Containers, Data Access/Integration, Web, AOP, Instrumentation, and Test.
Let's learn about the components of Spring architecture.