Java

2024.10.01 OOP 회원과 주문 관리 설계

정훈5 2024. 10. 1. 14:06

 

 

회원 가입 시스템 설계

 

 

프로젝트 생성

project_name : oop_sample

 

 

 

 

Grade.java

더보기 
package member;

public enum Grade {
	BASIC, VIP
}

 

Member.java

더보기 
package member;

public class Member {
	
	private Long id;
	private String name;
	private Grade grade;
	
	
	public Member(Long id, String name, Grade grade) {
		this.id = id;
		this.name = name;
		this.grade = grade;
	}


	public Long getId() {
		return id;
	}


	public void setId(Long id) {
		this.id = id;
	}


	public String getName() {
		return name;
	}


	public void setName(String name) {
		this.name = name;
	}


	public Grade getGrade() {
		return grade;
	}


	public void setGrade(Grade grade) {
		this.grade = grade;
	}


	@Override
	public String toString() {
		return "Member [id=" + id + ", name=" + name + ", grade=" + grade + "]";
	}
	
	
	
}

 

MemberRepository.java

더보기 
package member.repository;

import member.Member;

public interface MemberRepository {
	
	void save(Member member);
	Member findById(Long memberId);

}

 

MemberServiceImpl.java

더보기 
package member.service;

import member.Member;
import member.repository.MemberRepository;

public class MemberServiceImpl implements MemberService {
	
	private MemberRepository repository;
	
	public MemberServiceImpl(MemberRepository repository) {
		this.repository = repository;
	}

	@Override
	public void signUp(Member member) {
		repository.save(member);
		// TODO Auto-generated method stub
	}

	@Override
	public Member findByIdMember(Long memberId) {
		// TODO Auto-generated method stub
		return repository.findById(memberId);
	}
}

 

DBMemberRepositoryImpl.java

더보기 
package member.repository;

import member.Member;

public class DBMemberRepositoryImpl implements MemberRepository {

	@Override
	public void save(Member member) {
		// TODO Auto-generated method stub
	}

	@Override
	public Member findById(Long memberId) {
		// TODO Auto-generated method stub
		return null;
	}
}

 

MemberService.java

더보기 
package member.service;

import member.Member;

public interface MemberService {
	
	void signUp(Member member);
	Member findByIdMember(Long memberId);

}

 

MemoryMemberRepositoryImpl.java

더보기 
package member.repository;

import java.util.HashMap;
import java.util.Map;

import member.Grade;
import member.Member;

public class MemoryMemberRepositoryImpl implements MemberRepository {
	
	private static MemoryMemberRepositoryImpl instance;
	private Map<Long, Member>memberStore = new HashMap<>();
	
	public MemoryMemberRepositoryImpl() {
		// TODO Auto-generated constructor stub
		initData();
	} // 생성자
	
	public static MemoryMemberRepositoryImpl getInstance() {
		
		if(instance == null) {
			instance = new 	MemoryMemberRepositoryImpl();
		}
		return instance;
	}
	
	private void initData() {
		memberStore.put(1L, new Member(1L, "홍길동", Grade.VIP));
		memberStore.put(2L, new Member(2L, "이몽룡", Grade.BASIC));
		memberStore.put(3L, new Member(3L, "성춘향", Grade.VIP));
	}

	@Override
	public void save(Member member) {
		// TODO Auto-generated method stub
		memberStore.put(member.getId(), member);
		
	}

	@Override
	public Member findById(Long memberId) {
		// TODO Auto-generated method stub
		return memberStore.get(memberId);
	}
};

 

MainTest1.java

더보기 
package member;

import member.repository.MemberRepository;
import member.repository.MemoryMemberRepositoryImpl;
import member.service.MemberService;
import member.service.MemberServiceImpl;

public class MainTest1 {

	public static void main(String[] args) {

		// MemberRepository memberRepsitoryDB = new DBMemberRepositoryImpl();

		MemberRepository memberRepsitory = MemoryMemberRepositoryImpl.getInstance();
		MemberService memberService = new MemberServiceImpl(memberRepsitory);

		// 클라이언트
		Member member = new Member(100L, "티모", Grade.VIP);

		// 신규 회원 가입 기능 요청
		memberService.signUp(member);

		// 정상적으로 메모리에 들어 갔는지 확인

		System.out.println(memberService.findByIdMember(100L));
		System.out.println(memberService.findByIdMember(1L));
		System.out.println(memberService.findByIdMember(2L));

	}

}

 

 

 

 

FixDiscountPolicyImpl.java

더보기 
package order;

import member.Grade;
import member.Member;

public class FixDiscountPolicyImpl implements DiscountPolicy {
	
	private int discountFixAmount = 1500;

	@Override
	public int discount(Member member, int price) {
		// VIP 회원만 할인 금액 적용 된다. 
		if (member.getGrade() == Grade.VIP) {
			return discountFixAmount;
		}
		return 0;
	}
}

 

PercentDiscountPolicyImpl.java

더보기 
package order;

import member.Grade;
import member.Member;

public class PercentDiscountPolicyImpl implements DiscountPolicy {

	private double discountPercent = 10.0; // 10% 할인
	
	@Override
	public int discount(Member member, int price) {
		if (member.getGrade() == Grade.VIP) {
			return (int)(price * (discountPercent / 100));
		}
		return 0;
	}
}

 

Order.java

더보기 
package order;

public class Order {

	private Long memberId;
	private String itemName;
	private int imtePrice;
	private int dicountPrice;

	public Order(Long memberId, String itemName, int imtePrice, int dicountPrice) {
		this.memberId = memberId;
		this.itemName = itemName;
		this.imtePrice = imtePrice;
		this.dicountPrice = dicountPrice;
	}

	// 상품 금액에 할인된 가격 금액 출력 하는 기능
	public int calculateDiscount() {
		return imtePrice - dicountPrice;
	}

	public Long getMemberId() {
		return memberId;
	}

	public void setMemberId(Long memberId) {
		this.memberId = memberId;
	}

	public String getItemName() {
		return itemName;
	}

	public void setItemName(String itemName) {
		this.itemName = itemName;
	}

	public int getImtePrice() {
		return imtePrice;
	}

	public void setImtePrice(int imtePrice) {
		this.imtePrice = imtePrice;
	}

	public int getDicountPrice() {
		return dicountPrice;
	}

	public void setDicountPrice(int dicountPrice) {
		this.dicountPrice = dicountPrice;
	}

	@Override
	public String toString() {
		return "Order [memberId=" + memberId + ", itemName=" + itemName + ", imtePrice=" + imtePrice + ", dicountPrice="
				+ dicountPrice + "]";
	}
}

 

OrderService.java

더보기 
package order;

public interface OrderService {
	Order createOrder(Long memberId, String itemName, int itemPrice);
}

 

OrderServiceImpl.java

더보기 
package order;

import member.Member;
import member.repository.MemberRepository;

public class OrderServiceImpl implements OrderService {

	private final MemberRepository memberRepsitory;
	private final DiscountPolicy discountPolicy;

	public OrderServiceImpl(MemberRepository memberRepsitory, DiscountPolicy discountPolicy) {
		this.memberRepsitory = memberRepsitory;
		this.discountPolicy = discountPolicy;
	}

	@Override
	public Order createOrder(Long memberId, String itemName, int itemPrice) {
		Member member = memberRepsitory.findById(memberId);
		int discountPrice = discountPolicy.discount(member, itemPrice);
		return new Order(memberId, itemName, itemPrice, discountPrice);
	}

}

 

DiscountPloicy.java

더보기 
package order;

import member.Member;

public interface DiscountPolicy {
	int discount(Member member, int price);
}

 

OrderServiceTest.java

더보기 
package order;

import member.Grade;
import member.Member;
import member.repository.MemberRepository;
import member.repository.MemoryMemberRepositoryImpl;

public class OrderServiceTest {
	
	public static void main(String[] args) {
		
		MemberRepository memberRepsitory = MemoryMemberRepositoryImpl.getInstance();
		Member member = new Member(1L, "홍길동", Grade.VIP);
		
		
		// 고정 할인 정책 테스트 
		DiscountPolicy fixDiscountPolicy = new FixDiscountPolicyImpl();
		DiscountPolicy percentDiscountPolicy = new PercentDiscountPolicyImpl();
		
		OrderService orderService1 = new OrderServiceImpl(memberRepsitory, percentDiscountPolicy);
		Order order1 = orderService1.createOrder(1L, "맥북", 10000);
		System.out.println(order1);
		System.out.println(order1.calculateDiscount());
	}
}

 

 

AppConfig.java

더보기 
package config;

import member.repository.MemberRepository;
import member.repository.MemoryMemberRepositoryImpl;
import member.service.MemberService;
import member.service.MemberServiceImpl;
import order.DiscountPolicy;
import order.FixDiscountPolicyImpl;
import order.OrderService;
import order.OrderServiceImpl;

public class AppConfig {
	
	public MemberRepository geMemberRepsitory() {
		return MemoryMemberRepositoryImpl.getInstance();
	}
	
	public MemberService getMemberService() {
		return new MemberServiceImpl(geMemberRepsitory());
	}
	
	public DiscountPolicy getDiscountPolicy() {
		// 할인 정책이 --> 고정할인 
		// 변경 --->정율 할인 바꾸면 된다. 
		 return new FixDiscountPolicyImpl();  // 이 부분만 변경하면 됩니다. 
		//return new PercentDiscountPolicyImpl();
	}
	
	public OrderService getOrderService() {
		return new OrderServiceImpl(geMemberRepsitory(), getDiscountPolicy());
	}

}

 

MainApp.java

더보기 
package config;

import member.Grade;
import member.Member;
import member.service.MemberService;
import order.Order;
import order.OrderService;

public class MainApp {
	
public static void main(String[] args) {
		
		AppConfig appConfig = new AppConfig();
		
		// 클라이언트 입장에서 코딩 
		
		// 회원 가입 기능이 필요 함. 
		MemberService memberService = appConfig.getMemberService();
		Member member = new Member(200L, "도시락", Grade.VIP);
		memberService.signUp(member); // 회원 가입 
		
		// 사용자 주문 요청 
		OrderService orderService1 = appConfig.getOrderService();
		Order order1 = orderService1.createOrder(member.getId(), "아이폰16", 3_000);
		System.out.println(order1);
		System.out.println(order1.getDicountPrice());
	}
}

 

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