@RequiredArgsConstructor

RequiredArgsConstructor 란??

생성자를통한 의존성주입을 간결하게 설정하는 애노테이션이다.

Before

@Controller
public class UserController {
    
    private UserService userService;
    
    public UserController(UserService userService){
       this.userService = userService; 
    }
}

After

@Controller
@RequiredArgsConstructor
public class UserController {
    
    private final UserService userService;
}