Spring Rest -

Spring's RequestBody and ResponseBody Annotations - Baeldung

: Implement a global exception handler (using @ControllerAdvice ) to return consistent error responses when a POST fails. Consuming POST Services Spring REST

: Combines @Controller and @ResponseBody , signaling that the class handles web requests and returns data (like JSON) directly. Spring REST

: It is often best to use DTOs rather than exposing your database entities directly to the API. Spring REST

: Use @Valid along with Jakarta Bean Validation to ensure incoming data meets quality standards before processing.