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# @ControllerAdvice

https\://spring.io/blog/2013/11/01/exception-handling-in-spring-mvc

 @ControllerAdvice 란?

 동일한 예외 처리를 개별 컨트롤러가 아닌 전체 애플리케이션에 적용할 수 있다.

* Exception handling methods annotated with `@ExceptionHandler`.
* Model enhancement methods (for adding additional data to the model) annotated with\
  `@ModelAttribute`. Note that these attributes are *not* available to the exception handling views.
* Binder initialization methods (used for configuring form-handling) annotated with\
  `@InitBinder`.

 @ControllerAdvice가 없기전의 Exception 처리

* Error 페이지
* Controller기반 @ExceptionHandler 사
* Exception에 따른 Class 생성