[수업창작]게시판만들기 20-05-14

import java.util.Scanner;
import java.util.*;
import java.text.*; 

class Main{
	public static void main(String[] args) {
	Scanner scanner = new Scanner(System.in);
	Board board = new Board();
	board.setScanner(scanner);
	board.start();
	}
}
class Board{
	Scanner scanner;
	void setScanner(Scanner scanner) {
		this.scanner = scanner;
	}
	Article[] articleArr = new Article[100];
	int articleArrLastIndex = -1;
	int lastArticleId = 0;
	void start() {
		commandHelp();
		while(true) {
			System.out.println("명령어입력:");
			String command = scanner.next().trim();
			if(command.equals("help")) {
				scanner.nextLine();
				commandHelp();
			} else if(command.equals("add")) {
				scanner.nextLine();
				commandAdd();
			} else if(command.equals("list")) {
				scanner.nextLine();
				commandList();
			} else if(command.equals("detail")) {
				int detailIn = scanner.nextInt();
				scanner.nextLine();
				commandDetail(detailIn);
			} else if(command.equals("modify")) {
				int modifyIn = scanner.nextInt();
				scanner.nextLine();
				commandModify(modifyIn);
			}  else if(command.equals("delete")) {
				int deleteIn = scanner.nextInt();
				scanner.nextLine();
				commandDelete(deleteIn);
				commandList();
			} else if(command.equals("exit")) {
				scanner.nextLine();
				System.out.println("게시판종료");
				break;
			}
		}
	}
	void commandHelp() {
		System.out.println("===명령어 리스트===");
		System.out.println("help");
		System.out.println("list");
		System.out.println("add");
		System.out.println("modify");
		System.out.println("delete");
		System.out.println("detail + 게시물번호");
		System.out.println("exit");
	}
	void commandAdd() {
		Article newArticle = new Article();
		
		lastArticleId ++;
		System.out.printf("제목: ");
		newArticle.title = scanner.next();
		scanner.nextLine();
		System.out.printf("내용: ");
		newArticle.body=scanner.next();
		
		newArticle.date= getNowDateStr();
		System.out.printf("날짜: %s\n", newArticle.date);
		newArticle.id = lastArticleId;
		System.out.printf("%d번 게시물이 추가되었습니다.\n", newArticle.id);
		
		articleArrLastIndex ++;
		articleArr[articleArrLastIndex] = newArticle;
	}
	void commandList() {
		System.out.println("=게시물 리스트=");
		System.out.println("번호 |날짜          |제목");
		for(int i=0; i<=articleArrLastIndex; i++) {
			System.out.printf("%d  |%s     |%s\n",articleArr[i].id,articleArr[i].date,articleArr[i].title);
		}
	}
	Article getArticleById(int num) {
		for(int i=0; i<=articleArrLastIndex; i++) {
			if(articleArr[i].id == num) {
				return articleArr[i];
			}
		}
		return null;
	}
	void commandDetail(int num) {
		Article temp = getArticleById(num);
		if(temp==null) {
			System.out.println("해당 게시물은 존재하지 않습니다.");
			return;
		}
		System.out.println("=게시물 상세=");
		System.out.printf("번호:%d \n",temp.id);
		System.out.printf("날짜:%s \n",temp.date);
		System.out.printf("제목:%s \n",temp.title);
		System.out.printf("내용:%s \n",temp.body);
	}
	void commandModify(int num) {
		Article temp = getArticleById(num);
		if(temp==null) {
			System.out.println("해당 게시물은 존재하지 않습니다.");
			return;
		}
		System.out.println("=게시물 수정=");
		System.out.printf("제목: ");
		temp.title = scanner.next();
		scanner.nextLine();
		System.out.printf("내용: ");
		temp.body=scanner.next();
	}
	void commandDelete(int num) {
		Article temp = getArticleById(num);
		if(temp==null) {
			System.out.println("해당 게시물은 존재하지 않습니다.");
			return;
		}
		int index = temp.id -1 ; 
		for(int i=index; i<=articleArrLastIndex-1; i++) {
			articleArr[i] = articleArr[i+1];
		}
		System.out.printf("%d번 게시물이 삭제되었습니다.", temp.id);
		articleArrLastIndex --;
	}
	String getNowDateStr() {
		SimpleDateFormat formatter = new SimpleDateFormat ( "yyyy.MM.dd HH:mm:ss", Locale.KOREA );
		Date currentTime = new Date ( );
		String dTime = formatter.format ( currentTime );
		return dTime;
		
	}
}

class Article{
	int id;
	String date;
	String title;
	String body;
}