ResponseEntity and HTTP Status Codes | Spring Boot Interview Series #15
In this video, we will discuss **ResponseEntity and HTTP Status Codes in Spring Boot**.
This is Video #15 of our **Spring Boot Interview Series**.
In the previous video, we discussed **Request Body, Response Body and JSON Conversion**. We understood how Spring Boot reads JSON request data using `@RequestBody` and returns Java objects as JSON response.
Now, in this video, we will understand how to return a proper response body along with the correct HTTP status code using `ResponseEntity`.
Topics covered in this video:
1. What is `ResponseEntity` in Spring Boot?
2. Why do we use `ResponseEntity`?
3. Common HTTP status codes in REST APIs
4. Difference between returning an object directly and returning `ResponseEntity`
5. How to create a proper custom API response structure
In REST APIs, returning only data is not always enough.
For example:
`GET /courses/101`
Course found → `200 OK`
`POST /courses`
Course created → `201 Created`
`DELETE /courses/101`
Deleted successfully with no body → `204 No Content`
`GET /courses/999`
Course not found → `404 Not Found`
Using `ResponseEntity`, we can control:
Response body
HTTP status code
Response headers
We will also discuss how to create a common API response structure using fields like `success`, `message`, and `data`.
By the end of this video, you will be able to clearly explain `ResponseEntity`, HTTP status codes, direct object return vs `ResponseEntity`, and custom API response structure in Spring Boot interviews.
Watch the complete Spring Boot Interview Series playlist:
[ • Spring Boot Interview Questions ]( • Spring Boot Interview Questions )
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