What Is the Flow Architecture of Spring Boot?

The flow of a typical Spring Boot architecture can be seen in the diagram below:

Let us now try and understand the diagram:

1. HTTP requests (PUT or GET) are made by the client.
2. The request is sent to the controller, who maps and handles it. The service logic is then called.
3. All business logic is performed at the service layer. It executes logic on the data that has been mapped to JPA using model classes.
4. If no errors occurred, a JSP page is returned to the user.