Spring Boot controllers support multiple

Short summary

Spring Boot controllers support multiple return types (DTO, ResponseEntity, void, ModelAndView, async patterns), each with specific use cases. DTOs work for simple CRUD; ResponseEntity enables full HTTP control. Choosing the right pattern improves API design clarity.

• •DTO return type best for simple CRUD APIs with minimal boilerplate
• •ResponseEntity provides full control over status codes, headers, and response customization
• •Specialized patterns (void, CompletableFuture, Mono/Flux) for async and reactive systems

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