スプリング容器(スプリング基本編by金英漢)

ばね容器

AppConfig

@Configuration
  public class AppConfig {
  
      @Bean
      public MemberService memberService() {
          return new MemberServiceImpl(memberRepository());
      }
      
      @Bean
      public OrderService orderService() {
          return new OrderServiceImpl(
                  memberRepository(),
                  discountPolicy());
	}
    
    ....
    
}

MemberApp

public class MemberApp {
      public static void main(String[] args) {
  //        AppConfig appConfig = new AppConfig();
  //        MemberService memberService = appConfig.memberService();
          ApplicationContext applicationContext = new AnnotationConfigApplicationContext(AppConfig.class);
          MemberService memberService = applicationContext.getBean("memberService", MemberService.class);
          }
   }

OrderApp

public class OrderApp {

public static void main(String[] args) {
//      AppConfig appConfig = new AppConfig();
//      MemberService memberService = appConfig.memberService();
//      OrderService orderService = appConfig.orderService();

        ApplicationContext applicationContext = new AnnotationConfigApplicationContext(AppConfig.class);
        MemberService memberService = applicationContext.getBean("memberService", MemberService.class);
        OrderService orderService = applicationContext.getBean("orderService", OrderService.class);
        }
  }

//스프링 컨테이너 생성
ApplicationContext applicationContext = new AnnotationConfigApplicationContext(AppConfig.class);