Add auto config by Component Scan

src/main/java/com/naver/shopping/AutoAppConfig.java

@@ -0,0 +1,12 @@
+package com.naver.shopping;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.ComponentScan.Filter;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.FilterType;
+
+@Configuration
+@ComponentScan(
+        excludeFilters = @Filter(type = FilterType.ANNOTATION, classes = Configuration.class)
+)
+public class AutoAppConfig { }

src/main/java/com/naver/shopping/discount/FixDiscountPolicy.java

@@ -2,7 +2,9 @@
 
 import com.naver.shopping.member.Grade;
 import com.naver.shopping.member.Member;
+import org.springframework.stereotype.Component;
 
+@Component
 public class FixDiscountPolicy implements DiscountPolicy {
     private int discountFixAmount = 1000; //할인할 고정 금액
 

src/main/java/com/naver/shopping/discount/RateDiscountPolicy.java

@@ -2,7 +2,9 @@
 
 import com.naver.shopping.member.Grade;
 import com.naver.shopping.member.Member;
+import org.springframework.stereotype.Component;
 
+@Component
 public class RateDiscountPolicy implements DiscountPolicy {
     private int discountPercent = 10; //10% 할인
     @Override

src/main/java/com/naver/shopping/member/MemberServiceImpl.java

@@ -1,5 +1,9 @@
 package com.naver.shopping.member;
 
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
 public class MemberServiceImpl implements MemberService {
     private final MemberRepository memberRepository;
 

src/main/java/com/naver/shopping/member/MemoryMemberRepository.java

@@ -1,8 +1,11 @@
 package com.naver.shopping.member;
 
+import org.springframework.stereotype.Component;
+
 import java.util.HashMap;
 import java.util.Map;
 
+@Component
 public class MemoryMemberRepository implements MemberRepository {
     private static Map<Long, Member> store = new HashMap<>();
 

src/main/java/com/naver/shopping/order/OrderServiceImpl.java

@@ -3,7 +3,10 @@
 import com.naver.shopping.member.Member;
 import com.naver.shopping.member.MemberRepository;
 import com.naver.shopping.discount.DiscountPolicy;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
 
+@Component
 public class OrderServiceImpl implements OrderService {
     private MemberRepository memberRepository;
     private DiscountPolicy discountPolicy;