Complete Spring 7 & Spring Boot 4 course from beginner to Advance using first thought principle.
Curated by: Coder Army (29 videos)
In this video, we will learn how to make Spring Boot REST APIs professional using proper exception handling, HTTP status codes, ResponseEntity, and global error responses. Most beginner APIs return random responses like 200 OK for everything, null when data is not found, or default Spring Boot error pages. But in real-world backend development, APIs must clearly communicate what happened to the client. In this lecture, we will understand: ✅ Why professional API responses matter ✅ HTTP status codes like 200, 201, 204, 400, 404, 409 and 500 ✅ How ResponseEntity gives control over status, body and headers ✅ Spring Boot default error handling ✅ Why handling errors inside every controller is a bad practice ✅ What is @RestControllerAdvice ✅ What is @ExceptionHandler ✅ How to create a Global Exception Handler ✅ How to create custom exceptions like ResourceNotFoundException ✅ How to return standard error response DTOs ✅ How to handle validation errors globally ✅ How to handle duplicate resources using 409 Conflict ✅ How to make CRUD APIs clean, readable and production-style By the end of this video, you will understand how real Spring Boot projects handle errors cleanly without writing repeated if-else logic in every controller. This lecture is part of our Spring Boot backend development series, where we are learning step-by-step how to build professional Java backend applications. JAVA Beginner to Advance Series : https://youtube.com/playlist?list=PLQEaRBV9gAFsR15tNo2QLF9d2qc-c018p&si=XAdvQvS0EdyjdbpL Join System Design WhatsApp Group: https://www.whatsapp.com/channel/0029VbBF1XKF1YlMyYuPM23s Code and Notes: Github : https://github.com/adityatandon15/Spring-Framework-Full-Course We have paid courses on DSA, Web Development , Blockchain, System Design & GenAI. Join Courses: https://strikes.in/ Coder Army Website: https://coderarmy.in/#home Coder Army App: https://play.google.com/store/apps/details?id=com.rohit.negi Connect with Aditya Tandon Instagram : https://www.instagram.com/adityatandon2 LinkedIn : https://www.linkedin.com/in/adityatandon2/ Twitter : https://x.com/adityatandon02