When I started learning Spring Boot, I noticed two ways to return data from a controller. Return the object directly. Or wrap it in a ResponseEntity. At first, returning the object directly seemed simpler. Less code. Fewer things to think about. But the more I learned it, the more I understood why ResponseEntity is the right default. When you return a raw object, you are letting Spring decide the status code, the headers, and how the response is shaped. Most of the time it guesses correctly. But an API that works because of guessing is an API waiting to surprise you. ResponseEntity puts you in control of three things at once. The status code, the headers, and the body. All in one place. All explicit. The caller knows exactly what to expect, and you know exactly what you are sending. It also makes your API honest. A method that returns ResponseEntity is saying clearly: I processed your request and I have nothing to give back. A method that returns ResponseEntity is saying: here is the resource you asked for. The contract is visible in the code itself. I have consumed a lot of APIs that didn't make this contract clear. You would get a 200 with an empty body and no idea whether that meant success, not found, or something in between. ResponseEntity is a small habit that makes a meaningful difference. #SpringBoot #Java #BackendDevelopment #SoftwareEngineering
Great insight. Relying on explicit status codes and headers via ResponseEntity is so much better than letting the framework guess. Those small details define a clean API.
https://www.baeldung.com/spring-response-entity