CRUD - Member.java

package oop;
/**
 * 요구사항 (기능정의)
 * <사용자기능>
 * 1. 회원가입
 * 2. 로그인 
 * 3. 비번 수정
 * 4. 회원탈퇴
 * 5. 아이디 존재 체크
 * 6. 마이페이지
 * **********
 * <관리자기능>
 * 7. 회원목록
 * 8. 아이디검색
 * 9. 이름검색
 * 10. 전체 회원수
 */
 
import java.util.Scanner;
 
class Member {
    private String userid,password, name;
    
    public Member() {
        // TODO Auto-generated constructor stub
    }
    
    public void setUserid(String userid) {
        this.userid = userid;
    }
    public String getUserid() {
        return this.userid;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getPassword() {
        return this.password;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getName() {
        return this.name;
    }
    
    public String toString() {
        return "[아이디: "+userid+", 비번: "+password+", 이름: "+name+"]";
    }
 
}
interface MemberService {
    // 1. 회원가입
    public void join(Member member);
    // 2. 로그인
    public String login(Member member);
    // 3. 회원목록
    public Member[] list();
    // 4. 아이디 중복체크
    public String existId(String id);
    // 5. 비번 수정
    public String changePassword(Member member);
    // 6. 회원탈퇴
    public String withdrawal (Member member);
    // 7. 아이디검색
    public Member idSearch(String id);
    // 8. 이름 검색
    public Member[] nameSearch(String name);
    // 9. 전체 회원수
    public int count();
}
class MemberServiceImpl implements MemberService{
    private Member[] members; 
    private int count;
    
    public MemberServiceImpl() {
        members  = new Member[3];
        count = 0;
    }
    // 1. 회원가입
    @Override
    public void join(Member member) {
        members[count] = member;
        count++;
    }
    
    // 2. 로그인
    @Override
    public String login(Member member) {
        String result = "FAIL";
        for(int i=0;i< count; i++) {
            if(member.getUserid().equals(members[i].getUserid())
                    &&
                member.getPassword().equals(members[i].getPassword())) {
                result = "SUCCESS";
                break;
            }
        }
        return result;
    }
    // 3. 회원목록
    @Override
    public Member[] list() {
        return members;
    }
    // 4. 아이디 중복체크
    @Override
    public String existId(String id) {
        String result = "중복없음";
        for(int i=0; i< count; i++) {
            if(id.equals(members[i].getUserid())) {
                result ="중복된 아이디";
            }
        }
        return result;
    }
    // 5. 비번 수정
    @Override
    public String changePassword(Member member) {
        String result = "수정실패";
        for(int i =0; i< count; i++) {
            if(member.getUserid().equals(members[i].getUserid())) {
                members[i].setPassword(member.getPassword());
                result = "수정성공";
                break;
            }
        }
        return result;
    }
    // 6. 회원탈퇴
    @Override
    public String withdrawal(Member member) {
        String result = "탈퇴 실패";
        for(int i=0; i< count; i++) {
            if(member.getUserid().equals(members[i].getUserid())
                    && member.getPassword().equals(members[i].getPassword())) {
                members[i] = members[count-1];
                members[count-1] = null;
                count --;
                result = "탈퇴 성공";
                break;
            }
        }
        return result;
    }
    // 7. 아이디검색
    @Override
    public Member idSearch(String id) {
        Member member = new  Member();
        for(int i =0; i< members.length; i++) {
            if(id.equals(members[i].getUserid())) {
                member = members[i];
                break;
            }
        }
        return member;
    }
    // 8. 이름 검색(동명이인 처리필요)
    @Override
    public Member[] nameSearch(String name) {
        int cnt = 0; // 동명이인의 수
        for(int i =0; i< members.length; i++) {
            if(name.equals(members[i].getName())) {
                cnt++;
            }
        }
        Member[] searchMembers = new Member[cnt];
        int k = 0;
        for(int i =0; i< members.length; i++) {
            if(name.equals(members[i].getName())) {
                searchMembers[k] = members[i];
                k++;
                if(k == cnt) break;
            }
        }
        return searchMembers;
    }
    // 9. 전체 회원수
    @Override
    public int count() {
        return count;
    }
}
public class MemberApp {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Member member = null;
        MemberService memberService = new MemberServiceImpl();
        while (true) {
            System.out.println("메뉴: 0.종료 1.회원가입 2.로그인"
                    + "5.아이디존재 7.회원목록");
            switch (scanner.nextInt()) {
            case 0: System.out.println("종료");return;
            case 1: // 1. 회원가입
                member = new Member();
                System.out.println("회원가입");
                System.out.println("아이디: ");
                member.setUserid(scanner.next());
                System.out.println("비밀번호: ");
                member.setPassword(scanner.next());
                System.out.println("이름: ");
                member.setName(scanner.next());
                memberService.join(member);
                break;
            case 2: // 2. 로그인
                System.out.println("로그인");
                member = new Member();
                System.out.println("아이디: ");
                member.setUserid(scanner.next());
                System.out.println("비밀번호: ");
                member.setPassword(scanner.next());
                String result= memberService.login(member);
                System.out.println(result);
                break;
            case 3: // 3. 회원목록
                System.out.println("목록보기");
                Member[] list= memberService.list();
                for(int i=0;i < 3;i++) {
                    System.out.println(list[i].toString());
                }
                break;
            case 4: // 4. 아이디 중복체크
                System.out.println("아이디 체크");
                member = new Member();
                System.out.println("아이디: ");
                result= memberService.existId(scanner.next());
                System.out.println(result);
                break;
            case 5: // 5. 비번 수정
                System.out.println("비번 수정");
                member = new Member();
                System.out.println("아이디: ");
                member.setUserid(scanner.next());
                System.out.println("변경할 비번: ");
                member.setPassword(scanner.next());
                result= memberService.changePassword(member);
                System.out.println(result);
                break;
            case 6: // 6. 회원탈퇴
                System.out.println("회원탈퇴");
                member = new Member();
                System.out.println("삭제할 아이디: ");
                member.setUserid(scanner.next());
                System.out.println("비번 다시 입력: ");
                member.setPassword(scanner.next());
                result= memberService.withdrawal(member);
                System.out.println(result);
                break;
            case 7: // 7. 아이디검색
                System.out.println("아이디검색");
                member = new Member();
                member = memberService.idSearch(scanner.next());
                System.out.println(member.toString());
                break;
            case 8:    // 8. 이름 검색
                Member[] findedMembers = memberService.nameSearch(scanner.next());
                for(Member m: findedMembers) {
                    System.out.println(m.toString());
                }
                break;
            case 9: // 9. 전체 회원수
                System.out.println(memberService.count());
                break; 
            default:
                System.out.println("메뉴에 없는 기능입니다.");
                break;
            }
        }
 
    }
}