In the application software architecture, the classic three-tier architecture consists of the user interface layer (Userlinterfacelayer), business logic layer (Businesslogiclayer) and data access…

In the application software architecture, the classic three-tier architecture consists of the user interface layer (Userlinterfacelayer), business logic layer (Businesslogiclayer) and data access layer (DataAccesslayer) from top to bottom. The data access layer is also called the domain layer, which is responsible for the processing of system business logic, and is also called the Service layer.