Filter

[사진 출처] https://mangkyu.tistory.com/173

필터에서는 @Autowired 가 안됌!!!

직접 Context의 Bean을 불러와야 함!!!

 ApplicationContext applicationContext = ApplicationContextProvider.getApplicationContext();
        UserServiceNewImpl serviceBean = applicationContext.getBean("userServiceNewImpl", UserServiceNewImpl.class);