영상
문제
DAO : Data Access Object
DTO : Data Transfer Object
JavaScript
복사
package 메서드정리3_문제;
import java.util.Scanner;
class MemberDAO {
int lastNumber = 10001;
int maxSize = 10000;
// [0]번호 [1]아이디 [2]비밀번호 [3]이름
String[][] memberList = new String[maxSize][4];
int memberCount = 0;
boolean checkId(String id) {
boolean check = false;
for(int i = 0; i < memberCount; i++) {
if(memberList[i][1].equals(id)) {
check = true;
break;
}
}
return check;
}
void insertMember(String id , String pw , String name) {
memberList[memberCount][0] = lastNumber + "";
memberList[memberCount][1] = id;
memberList[memberCount][2] = pw;
memberList[memberCount][3] = name;
lastNumber += 1;
memberCount += 1;
}
boolean checkLogin(String id , String pw) {
boolean check = false;
for(int i = 0; i < memberCount; i++) {
if(memberList[i][1].equals(id) && memberList[i][2].equals(pw)) {
check = true;
break;
}
}
return check;
}
}
class Controller {
Scanner scan = new Scanner(System.in);
MemberDAO memberDAO = null;
String log = "";
void init(MemberDAO memberDAO) {
this.memberDAO = memberDAO;
}
void run() {
while(true) {
System.out.println("=== [메인화면] ===");
System.out.println("[1]가입 [2]로그인 [0]종료");
int sel = scan.nextInt();
if(sel == 1) {
System.out.println("아이디를 입력하세요 : ");
String id = scan.next();
boolean check = memberDAO.checkId(id);
if(check == true) {
System.out.println("존재하는 아이디입니다.");
}else {
System.out.println("사용할수있는 아이디입니다.");
System.out.println("비밀번호를 입력하세요 : ");
String pw = scan.next();
System.out.println("이름을 입력하세요 : ");
String name = scan.next();
memberDAO.insertMember(id, pw, name);
}
}else if(sel == 2) {
System.out.println("아이디를 입력하세요 : ");
String id = scan.next();
System.out.println("비밀번호를 입력하세요 : ");
String pw = scan.next();
boolean check = memberDAO.checkLogin(id, pw);
if(check == true) {
log = id;
System.out.println("로그인성공");
while(true) {
System.out.println("[" + log + "님 로그인중]");
System.out.println("[1] 로그아웃 [2] 정보수정 [3] 정보확인 [4] 회원탈퇴");
int sel2 = scan.nextInt();
if(sel2 == 1) {
System.out.println("로그아웃합니다.");
log = "";
break;
} else if(sel2 == 2) {
// 직접 구현해보세요.
} else if(sel2 == 3) {
// 직접 구현해보세요.
} else if(sel2 == 4) {
// 직접 구현해보세요.
}
}
}else {
System.out.println("로그인실패");
}
}else if(sel == 0) {
break;
}
}
}
}
public class 메서드정리3_회원가입_문제 {
public static void main(String[] args) {
Controller controller = new Controller();
MemberDAO memberDAO = new MemberDAO();
controller.init(memberDAO);
controller.run();
}
}
Java
복사
해설
package 메서드정리3_문제;
import java.util.Scanner;
class MemberDAO {
int lastNumber = 10001;
int maxSize = 10000;
// [0]번호 [1]아이디 [2]비밀번호 [3]이름
String[][] memberList = new String[maxSize][4];
int memberCount = 0;
boolean checkId(String id) {
boolean check = false;
for(int i = 0; i < memberCount; i++) {
if(memberList[i][1].equals(id)) {
check = true;
break;
}
}
return check;
}
void insertMember(String id , String pw , String name) {
memberList[memberCount][0] = lastNumber + "";
memberList[memberCount][1] = id;
memberList[memberCount][2] = pw;
memberList[memberCount][3] = name;
lastNumber += 1;
memberCount += 1;
}
boolean checkLogin(String id , String pw) {
boolean check = false;
for(int i = 0; i < memberCount; i++) {
if(memberList[i][1].equals(id) && memberList[i][2].equals(pw)) {
check = true;
break;
}
}
return check;
}
}
class Controller {
Scanner scan = new Scanner(System.in);
MemberDAO memberDAO = null;
String log = "";
void init(MemberDAO memberDAO) {
this.memberDAO = memberDAO;
}
int getMemberIndex(String id) {
String[][] memberList = memberDAO.memberList;
int index = 0;
for(int i=0; i<memberList.length; i++) {
if(id.equals(memberList[i][1])) {
index = i;
break;
}
}
return index;
}
void run() {
while(true) {
if(memberDAO.memberCount > 0) {
System.out.println("=== [전체회원] ===");
System.out.println("[번호]\t[아이디]\t[비밀번호]\t[이름]");
for(int i=0; i<memberDAO.memberCount; i++) {
System.out.println(memberDAO.memberList[i][0] + "\t"
+ memberDAO.memberList[i][1] + "\t"
+ memberDAO.memberList[i][2] + "\t\t"
+ memberDAO.memberList[i][3] + "\t");
}
System.out.println();
}
System.out.println("=== [메인화면] ===");
System.out.println("[1]가입 [2]로그인 [0]종료");
int sel = scan.nextInt();
if(sel == 1) {
System.out.println("아이디를 입력하세요 : ");
String id = scan.next();
boolean check = memberDAO.checkId(id);
if(check == true) {
System.out.println("존재하는 아이디입니다.");
}else {
System.out.println("사용할수있는 아이디입니다.");
System.out.println("비밀번호를 입력하세요 : ");
String pw = scan.next();
System.out.println("이름을 입력하세요 : ");
String name = scan.next();
memberDAO.insertMember(id, pw, name);
}
}else if(sel == 2) {
System.out.println("아이디를 입력하세요 : ");
String id = scan.next();
System.out.println("비밀번호를 입력하세요 : ");
String pw = scan.next();
boolean check = memberDAO.checkLogin(id, pw);
if(check == true) {
log = id;
System.out.println("로그인성공");
while(true) {
System.out.println("[" + log + "님 로그인중]");
System.out.println("[1] 로그아웃 [2] 정보수정 [3] 정보확인 [4] 회원탈퇴");
int sel2 = scan.nextInt();
if(sel2 == 1) {
System.out.println("로그아웃합니다.");
log = "";
break;
} else if(sel2 == 2) {
while(true) {
System.out.println("수정할 항목을 선택하세요.");
System.out.println("[1] 비밀번호 [2] 이름 [0] 종료");
int menu = scan.nextInt();
if(menu == 0) {
break;
} else if(menu == 1) {
System.out.print("수정할 비밀번호를 입력하세요 : ");
String newPw = scan.next();
int index = getMemberIndex(log);
memberDAO.memberList[index][2] = newPw;
} else if(menu == 2) {
System.out.print("수정할 이름을 입력하세요 : ");
String newName = scan.next();
int index = getMemberIndex(log);
memberDAO.memberList[index][3] = newName;
}
}
} else if(sel2 == 3) {
int index = getMemberIndex(log);
System.out.println(memberDAO.memberList[index][0] + " " + memberDAO.memberList[index][1] + " "
+ memberDAO.memberList[index][2] + " " + memberDAO.memberList[index][3]);
} else if(sel2 == 4) {
int index = getMemberIndex(log);
for(int i=index; i<memberDAO.memberCount - 1; i++) {
memberDAO.memberList[i] = memberDAO.memberList[i + 1];
}
memberDAO.memberCount -= 1;
log = "";
break;
}
}
}else {
System.out.println("로그인실패");
}
}else if(sel == 0) {
break;
}
}
}
}
public class 메서드정리3_회원가입_정답 {
public static void main(String[] args) {
Controller controller = new Controller();
MemberDAO memberDAO = new MemberDAO();
controller.init(memberDAO);
controller.run();
}
}
Java
복사