Скачать или смотреть #64 Spring Framework Day 31 | ResponseEntity & HTTP Status Codes ⚡ | REST API CRUD in Spring Boot

📌 Welcome to Day 31 of of our Spring Framework Series!
In this session, we’ll dive deep into ResponseEntity in Spring Boot and understand how to return proper HTTP responses for REST APIs.

✅ What You’ll Learn in this Session:

ResponseEntity Basics
• What is ResponseEntity & why it is better than returning raw objects.
• Full control over HTTP response: body, status, and headers.

HTTP Status Codes Explained
• What is an HTTP Status Code?
• Common status codes in REST APIs: 200, 201, 204, 400, 401, 403, 404, 409, 500.
• Mapping CRUD operations (Create, Read, Update, Delete) to correct status codes.

Hands-On Examples
• Returning data with ResponseEntity.ok().
• Sending custom status code (201 Created).
• Handling 404 (Not Found) with ResponseEntity.notFound().
• Returning empty response (204 No Content).
• Adding custom headers in response.

CRUD Operations with ResponseEntity
• POST → 201 Created
• GET → 200 OK / 404 Not Found
• PUT / PATCH → 200 OK / 204 No Content
• DELETE → 204 No Content

✅ Why This is Important:
• REST APIs are not just about returning data – they must return correct status codes for clients.
• ResponseEntity gives developers fine-grained control over the response.
• Essential for building professional APIs used by frontend apps, mobile apps, and third-party integrations.

🎯 Perfect For:
👨‍🎓 Java & Spring Beginners
🧑‍💻 Backend Developers learning REST APIs
💼 Interview Preparation & Real-World API Projects

📚 Key Topics Covered:
• ResponseEntity in Spring Boot
• HTTP Status Codes for CRUD
• REST API CRUD Examples (GET, POST, PUT, DELETE)
• Custom Headers & Empty Responses

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