[Springboot] Parameter 1 of constructor in ClassA required a bean of type 'ClassB' that could not be found

jwt 적용 연습 중에 맞이한 에러를 정리한다.

@EnableWebSecurity
@RequiredArgsConstructor
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    private final TokenProvider tokenProvider;
    private final JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint;
    private final JwtAccessDeniedHandler jwtAccessDeniedHandler;
    
    ...
}

public class JwtAccessDeniedHandler implements AccessDeniedHandler {
	...
}

public class JwtAuthenticationEntryPoint implements AuthenticationEntryPoint {
	...
}

에러 메시지는 아래와 같다.
Parameter 1 of constructor in ClassA required a bean of type 'ClassB' that could not be found

단순한건데.. 오랜만에 보니 한참을 헤맸다.
JwtAccessDeniedHandler, JwtAuthenticationEntryPoint 정의부 상단에 @Component를 추가하니 해결~

@Component
public class JwtAccessDeniedHandler implements AccessDeniedHandler {
	...
}

@Component
public class JwtAuthenticationEntryPoint implements AuthenticationEntryPoint {
	...
}