Controller & Service :

• in this there will be just the GetMapping or any PutMapping etc.
• The logic for that will be in the service class and the model of the entity should be in another class
• then we can create a service object in the controller class to get the functionality and call that in the GetMapping

Application.properties & Adding Dependencies in pom.xml

• Spring boot uses Data JPA for connecting to data bases we just have to specify the configuration in application.properties under resources package

Hibernate

• Hibernate is just like the Sqlalchemy ORM to manipulate the database using java without implementing SQL queries directly

Data Access Layer (Repository)

• Look in the diagram for data access layer
• With hibernate and JPA we created the database layer, with controller the api layer, and with the service file the service layer
• This is the Interface class, which extends the JPA repository and we pass the Student class and the ID type we created in the student class
• This is Called the Repository