Spring Boot Exception Handling | REST API Request Validation & Exception Handling with Example

In this Spring Boot Tutorial Video, we are going to learn about Importance of applying Exception Handling in Java with Spring. And how we can manage Exceptions Globally with Spring.

Spring Boot provides beneficial error messages to engineers building REST APIs. Yet, those messages are useless for the general API consumer. We provide a simple approach to improving this functionality.

Important Concepts of Exception Handling in Spring -

RestController is the base annotation for classes that handle REST operations.

ExceptionHandler is a Spring annotation that provides a mechanism to treat exceptions thrown during execution of handlers (controller operations). This annotation, if used on methods of controller classes, will serve as the entry point for handling exceptions thrown within this controller only.

Altogether, the most common implementation is to use @ExceptionHandler on methods of @ControllerAdvice classes so that the Spring Boot exception handling will be applied globally or to a subset of controllers.

ControllerAdvice is an annotation in Spring and, as the name suggests, is “advice” for multiple controllers. It enables the application of a single ExceptionHandler to multiple controllers. With this annotation, we can define how to treat such an exception in a single place, and the system will call this handler for thrown exceptions on classes covered by this ControllerAdvice.

The subset of controllers affected can be defined by using the following selectors on @ControllerAdvice: annotations(), basePackageClasses(), and basePackages(). ControllerAdvice is applied globally to all controllers if no selectors are provided


Spring Boot Tutorial Series - https://www.youtube.com/watch?v=D2W4RogkwQw&list=PLegwQ5okVpBaQDOW2iv0S4Tq7JsFpQbJW

#java #exceptionhandling #spring #springboot