Stop Bad Data at the Door: Spring Boot Validation Explained!

Описание: 🎯 Your API is only as strong as the data it accepts.

Tired of dealing with null pointers, cryptic errors, or inconsistent inputs breaking your backend logic? You’re not alone — and the fix is simpler than you think.
In this video, I’ll show you how to build rock-solid APIs with Spring Boot by mastering validation. Whether you’re just using @Valid and @NotNull or ready to level up with custom validators, this is your go-to guide for writing clean, defensive API contracts.
We’ll cover:

✅ Why input validation is your first line of defense
✅ How to use annotations like @Size, @Min, and @Email
✅ What’s really happening under the hood with @Valid
✅ How to create your own custom validation annotations
✅ Bonus: how to return user-friendly error messages the right way

This isn't just theory — you’ll get real code examples, best practices, and the mindset shift that separates amateur APIs from professional, production-grade services.

Chapters:
00:00 Intro
00:52 Manual Validations
03:53 Concept: Where to Put Your Validations?
05:10 Getting Starter With Bean Validation
09:14 Returning Meaningful Error Responses
16:37 Custom Validator - Write Your Own Logic
21:57 That's All Folks!

📌 Based on the full in-depth blog post 👉 https://igventurelli.io/building-robu...

🫘 Bean Validation Spec: https://beanvalidation.org/2.0-jsr380/

👮🏻‍♂️ ControllerAdvice blog post: https://igventurelli.io/handling-exce...

📥 Download my free eBook Mastering Spring Boot Project Structure and start building APIs like a pro: https://spring-structure.igventurelli...

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🔥 Drop a comment: What’s your favorite validation trick in Spring?