Spring Boot Crud Patterns

If you're building Spring Boot 3 backends and tired of copy-pasting CRUD boilerplate, this generates the full stack: JPA entities with domain invariants, repository interfaces, application services with proper transaction boundaries, and REST controllers with validation. It follows a feature-focused architecture that keeps domain logic framework-free and enforces validation gates at each step, from directory structure through integration tests with Testcontainers. The examples show actual code for a Product feature with record-based DTOs, optimistic locking considerations, and proper HTTP status codes. Useful when you want consistency across endpoints without writing the same repository and controller patterns by hand every time.