spring-boot-crud-patterns

CRUD boilerplate generation automates scaffolding of domain, application, presentation, and infrastructure layers for Spring Boot 3 services. Run the generator script with a feature specification to produce controllers, repositories, DTOs, mappers, and tests aligned to clean architecture boundaries, reducing manual setup time and enforcing layer separation.

Feature-based architecture works with Spring Data JPA by organizing CRUD workflows around discrete features, each with its own domain models, repositories, and controllers. This approach maintains clean separation of concerns, simplifies testing, and accelerates onboarding while conforming to Spring Boot 3.5+ conventions.

Structure DTOs as immutable objects in the presentation layer, use dedicated mappers to convert between domain and transfer objects, and enforce validation at layer boundaries. This pattern isolates domain logic from HTTP concerns, enables testability, and ensures proper REST status codes and transactional boundaries.

Clean architecture maintains separation by assigning responsibilities to four layers: domain (business rules), application (use cases), presentation (REST endpoints), and infrastructure (persistence). Use adapters and DTOs to prevent cross-layer coupling, enforce immutability in transfer objects, and apply transactional boundaries consistently.

Spring Boot 3.5+ supports CRUD workflow automation through pattern-based code generation tools that scaffold DTOs, repositories, controllers, and tests from feature specifications. This ensures consistency with Spring Data JPA conventions, REST best practices, and clean architecture principles without manual boilerplate.