[Java] OOP 회원과 주문 관리 설계 - (1) 회원 정보 관리 기능

[Java] OOP 회원과 주문 관리 설계 - (1) 회원 정보 관리 기능

 

: 예제를 통해 OOP(Object Oriented Programming) 개념을 확실히 다잡아보자.

: 객체를 통해 회원가입 시스템을 구축해보자.

 

 

1. 패키지 및 클래스 생성

(1) Grade.java (Enum 타입)

package member;

public enum Grade {
	BASIC, VIP
}

 

 

(2) Member.java (클래스)

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;
	}
	
	
}

 

 

(3) MemberRepository.java(인터페이스)

package member.repository;

import member.Member;

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

 

 

(4) MemoryMemberRepositoryImpl.java(구현체)

package member.repository;

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

import member.Grade;
import member.Member;

public class MemoryMemberRepositoryImpl implements MemberRepsitory {

	private static MemoryMemberRepositoryImpl instance;
	private Map<Long,Member> memberStore = new HashMap<>();
	
	// 생성자
	public MemoryMemberRepositoryImpl() {
		initData();
	}
	
	// 싱글톤 외부 접근 메서드
	public static MemoryMemberRepositoryImpl getInstance() {
		if(instance == null) {
			instance = new MemoryMemberRepositoryImpl();
		}
		return instance;
	}
	
	// 샘플 초기 데이터
	private void initData() {
		memberStore.put(1L, new Member(1L, "홍길동", Grade.VIP)); // L:접미사
		memberStore.put(1L, new Member(2L, "이몽룡", Grade.BASIC)); // L:접미사
		memberStore.put(1L, new Member(3L, "성춘향", Grade.VIP)); // L:접미사
	}
	
	@Override
	public void save(Member member) {
		// 회원 저장
		memberStore.put(member.getId(), member);
	}

	@Override
	public Member findById(Long memberId) {
		// 회원 찾기
		return memberStore.get(memberId);
	}

}

 

 

(5) DBMemberRepositoryImpl.java

package member.repository;

import member.Member;

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

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

}