🚀 *@ControllerAdvice in Spring Boot | Global Exception Handling | REST API*

In this video, as part of the *Spring Boot Beginner to Advanced series**, we'll learn how to implement **Global Exception Handling* using `@ControllerAdvice` and `@ExceptionHandler`.

In the previous video, we learned how to handle exceptions using `@ExceptionHandler` inside a controller. But what happens when we have multiple controllers?

Instead of duplicating exception-handling code in every controller, Spring Boot provides `@ControllerAdvice` to centralize our exception-handling logic.

📌 In this video, you'll learn:

✅ What is `@ControllerAdvice`?
✅ Why do we need Global Exception Handling?
✅ Difference between `@ExceptionHandler` and `@ControllerAdvice`
✅ Creating a Global Exception Handler
✅ Handling `UserNotFoundException` globally
✅ Using `ResponseEntity` with exception handling
✅ Returning proper HTTP status codes
✅ Creating a standard error response
✅ Handling exceptions across multiple controllers
✅ Understanding generic exception handling

🔥 Practical Flow

```text
UserController
ProductController
OrderController
      ↓
@ControllerAdvice
      ↓
@ExceptionHandler
      ↓
Error Response
```

Example response:

```json
{
 "status": 404,
 "message": "User with id 10 not found"
}
```

This approach keeps your REST APIs *clean, maintainable, and easier to manage* as your application grows.

📚 Spring Boot Series

This video continues the Spring Boot REST API learning path:

`@RequestBody` → `ResponseEntity` → `@ExceptionHandler` → *`@ControllerAdvice`* → Validation

If you're learning *Java, Spring Boot and REST API development**, subscribe to **TechWithSravan* and follow the complete Beginner to Advanced series.

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