Spring Boot Application layer Architecture is must before developing the spring boot project. This Architecture explained how to developing spring boot project step by step. How to connect with front-end and back-end application.
when the request is coming from the front-end how the layers are working and get the specific request and send response it is called as layer Architecture. Spring consist of 4 imponent layers those are Controller, Service,Repository,Datasource.
when the request the coming from the front-end(Angular,React) first goes to the request to Controller Layer after that pass the request to Service Layer after that pass the request to Repository after that pass the request to Datasource(mysql, postgresql, mongodb).
i have attached the video link below. which will do this tutorials step by step
