Spring Boot Tutorial 0/110 lessons ~6 min read Lesson 91
Layered Architecture
Layered architecture is the pragmatic, Spring-shaped flavour of clean architecture: Controller → Service → Repository → DB.
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Focus
2 guided sections
Practice signal
Concept-first lesson
Career prep
Foundation builder
Introduction
Layered architecture is the pragmatic, Spring-shaped flavour of clean architecture: Controller → Service → Repository → DB. Easier to teach, perfectly fine for most CRUD-heavy backends.
Understanding the topic
The four standard layers and what belongs in each:
- Web/API layer — controllers, DTOs, exception handlers, validation.
- Service/Application layer — use cases, transactions, orchestration.
- Domain layer — entities, value objects, business rules.
- Persistence layer — JPA repos, JDBC, native queries.
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