How Many Layers Does Spring Boot Have?

Spring Boot consists of four layers, and they are as follows:

• Presentation Layer: this is the top layer and it is responsible for handling user interactions and presenting data to the user. This layer typically includes components such as controllers, views, and templates. Along with handling HTTP requests, it also manages authentication and JSON conversions.
• Business Layer: this layer in a Spring Boot application is responsible for implementing the application's core business logic and taking care of validation and authorization. This layer typically includes components such as services, repositories, and domain objects.
• Persistence Layer: this layer is responsible for storing and retrieving data from a data store, such as a database, and it typically includes components such as data sources, entity classes, and repositories.
• Database Layer: it is the last layer in a Spring Boot application and it includes all databases such as MySql, MongoDB, and others. This database layer is in charge of carrying out CRUD operations and may contain several databases.