회원관리-File

MemberMain

• 콘솔에 메뉴를 출력하는 클래스

package memberFile;

import java.util.Scanner;

public class MemberMain {

    public static void main(String[] args) {

        MemberService ms = new MemberService();
        Action action = null;
        Scanner sc = new Scanner(System.in);
        boolean isStop = false;
        do {
            System.out.println("메뉴를 선택하세요.");
            System.out.println("1. 회원 가입");
            System.out.println("2. 회원 목록보기");
            System.out.println("5. 종료");

            String command = sc.next();
            switch (command) {
            case "1":
                System.out.println("회원 가입");
                action = new AddAction();
                ms.process(action, sc);            
                break;
            case "2":
                System.out.println("회원 목록보기");
                action = new ListAction();
                action.execute(sc);
                break;
            case "5":
                System.out.println("5");
                isStop = true;
            }            

        }while(!isStop);

    }

}

MemberService

• 요청을 제어하는 서비스
• 실질적인 비즈니스 로직을 정의하는 Service

import java.util.Scanner;

public class MemberService {

    void process(Action action,Scanner sc){

        action.execute(sc);

    }

}

MemberVo

• 회원 정보 저장

package memberArray;

public class MemberVo {
    private String id;
    private String pw;
    private String name;
    private int age;

    public MemberVo() {
    }

    public MemberVo(String id, String pw, String name, int age) {
        super();
        this.id = id;
        this.pw = pw;
        this.name = name;
        this.age = age;
    }

    public String getId() {
        return id;
    }

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

    public String getPw() {
        return pw;
    }

    public void setPw(String pw) {
        this.pw = pw;
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "MemverVo [id=" + id + ", pw=" + pw + ", name=" + name + ", age=" + age + "]";
    }

}

Action

• 요청 처리 규격을 정의(인터페이스)
• 다형성 지원을 위해 사용

import java.util.Scanner;

public interface Action {

    void execute(Scanner sc);

}

각 액션들

AddAction

• 회원 가입 요청을 처리해 주는 클래스

package memberFile;

import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class AddAction implements Action{

    @Override
    public void execute(Scanner sc) {
        System.out.println("회원 정보 입력");
        System.out.print("ID :");
        String id = sc.next();
        System.out.print("PW :");
        String pw = sc.next();
        System.out.print("NAME :");
        String name = sc.next();
        System.out.print("AGE :");
        int age = sc.nextInt();

        String member = id;
        member += ("," + pw);
        member += ("," + name);
        member += ("," + age);
        member += ("\r\n");

        FileWriter fw = null;

        try {
            fw = new FileWriter("members.txt", true); // true : append
            fw.write(member);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                fw.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }    
}

ListAction

• 회원 목록보기 요청 처리

package memberFile;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;
import java.util.StringTokenizer;

public class ListAction implements Action{

    @Override
    public void execute(Scanner sc) {

        FileReader fr = null;
        BufferedReader bfr = null;
        StringTokenizer st = null;
        try {
            fr = new FileReader("members.txt");
            bfr = new BufferedReader(fr);
            String member = "";
            while((member = bfr.readLine()) != null){
                st = new StringTokenizer(member, ",");
                String fm = "ID : %s, PW : %s, Name : %s, Age : %s %n";
                System.out.printf(fm, st.nextToken(), st.nextToken(), st.nextToken(), st.nextToken());
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                fr.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }        

    }    

}