게시판 만들기 4일차(리팩토링) "리팩토링,구조개선,패키지분리"

★App 클래스를 만들어 Main class의 부담을 줄임

package com.KoreaIT.java.AM;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import com.KoreaIT.java.AM.dto.Article;
import com.KoreaIT.java.AM.dto.Member;
import com.KoreaIT.java.AM.util.Util;

public class App {

	List<Article> articles;
	List<Member> members;

	public App() {
		articles = new ArrayList<>();
		members = new ArrayList<>();
	}

	public void start() {
		System.out.println("==프로그램 시작==");

		makeTestData();

		Scanner sc = new Scanner(System.in);

		int lastArticleId = 3;
		int lastMemberId = 0;

		while (true) {
			System.out.print("명령어 > ");
			String command = sc.nextLine().trim();

			if (command.length() == 0) {
				System.out.println("명령어를 입력해주세요");
				continue;
			}

			if (command.equals("exit")) {
				break;
			}

			if (command.equals("member join")) {
				int id = lastMemberId + 1;
				String regDate = Util.getNowDateTimeStr();
				String loginId = null;
				while (true) {
					System.out.print("로그인 아이디 : ");
					loginId = sc.nextLine();

					if (isJoinableLoginId(loginId) == false) {
						System.out.println("이미 사용중인 아이디입니다");
						continue;
					}
					break;
				}

				String loginPw = null;
				String loginPwConfirm = null;

				while (true) {
					System.out.print("로그인 비밀번호 : ");
					loginPw = sc.nextLine();
					System.out.print("로그인 비밀번호 확인: ");
					loginPwConfirm = sc.nextLine();

					if (loginPw.equals(loginPwConfirm) == false) {
						System.out.println("비밀번호를 확인해주세요");
						continue;
					}
					break;
				}

				System.out.print("이름 : ");
				String name = sc.nextLine();

				Member member = new Member(id, regDate, regDate, loginId, loginPw, name);
				members.add(member);

				System.out.printf("%d번 회원이 가입되었습니다\n", id);
				lastMemberId++;

			} else if (command.equals("article write")) {
				int id = lastArticleId + 1;
				System.out.print("제목 : ");
				String regDate = Util.getNowDateTimeStr();
				String title = sc.nextLine();
				System.out.print("내용 : ");
				String body = sc.nextLine();

				Article article = new Article(id, regDate, regDate, title, body);
				articles.add(article);

				System.out.printf("%d번글이 생성되었습니다\n", id);
				lastArticleId++;

			} else if (command.startsWith("article list")) {
				if (articles.size() == 0) {
					System.out.println("게시글이 없습니다");
					continue;
				}

				String searchKeyword = command.substring("article list".length()).trim();

				List<Article> forPrintArticles = articles;

				if (searchKeyword.length() > 0) {
					System.out.println("searchKeyword : " + searchKeyword);
					forPrintArticles = new ArrayList<>();

					for (Article article : articles) {
						if (article.title.contains(searchKeyword)) {
							forPrintArticles.add(article);
						}
					}
					if (forPrintArticles.size() == 0) {
						System.out.println("검색 결과가 없습니다");
						continue;
					}
				}

				System.out.println(" 번호  //  제목    //  조회  ");
				for (int i = forPrintArticles.size() - 1; i >= 0; i--) {
					Article article = forPrintArticles.get(i);
					System.out.printf("  %d   //   %s   //   %d  \n", article.id, article.title, article.hit);
				}

			} else if (command.startsWith("article detail")) {

				String[] cmdDiv = command.split(" ");

				if (cmdDiv.length < 3) {
					System.out.println("명령어를 확인해주세요");
					continue;
				}

				int id = Integer.parseInt(cmdDiv[2]);

				Article foundArticle = getArticleById(id);

				if (foundArticle == null) {
					System.out.printf("%d번 게시물은 존재하지 않습니다\n", id);
					continue;
				}

				foundArticle.hit++;

				System.out.println("번호 : " + foundArticle.id);
				System.out.println("작성날짜 : " + foundArticle.regDate);
				System.out.println("수정날짜 : " + foundArticle.updateDate);
				System.out.println("제목 : " + foundArticle.title);
				System.out.println("내용 : " + foundArticle.body);
				System.out.println("조회 : " + foundArticle.hit);

			} else if (command.startsWith("article modify")) {

				String[] cmdDiv = command.split(" ");

				if (cmdDiv.length < 3) {
					System.out.println("명령어를 확인해주세요");
					continue;
				}

				int id = Integer.parseInt(cmdDiv[2]);

				Article foundArticle = getArticleById(id);

				if (foundArticle == null) {
					System.out.printf("%d번 게시물은 존재하지 않습니다\n", id);
					continue;
				}
				System.out.print("새 제목 : ");
				String updateDate = Util.getNowDateTimeStr();
				String newTitle = sc.nextLine();
				System.out.print("새 내용 : ");
				String newBody = sc.nextLine();

				foundArticle.title = newTitle;
				foundArticle.body = newBody;
				foundArticle.updateDate = updateDate;

				System.out.println(id + "번 글을 수정했습니다");

			} else if (command.startsWith("article delete")) {

				String[] cmdDiv = command.split(" ");

				if (cmdDiv.length < 3) {
					System.out.println("명령어를 확인해주세요");
					continue;
				}

				int id = Integer.parseInt(cmdDiv[2]);

				int foundIndex = getArticleIndexById(id);

				if (foundIndex == -1) {
					System.out.printf("%d번 게시물은 존재하지 않습니다\n", id);
					continue;
				}

				articles.remove(foundIndex);
				System.out.println(id + "번 글을 삭제했습니다");

			} else {
				System.out.println("존재하지 않는 명령어입니다");
			}
		}

		System.out.println("==프로그램 끝==");

		sc.close();

	}

	private boolean isJoinableLoginId(String loginId) {
		int index = getMemberIndexByLoginId(loginId);

		if (index == -1) {
			return true;
		}

		return false;
	}

	private int getMemberIndexByLoginId(String loginId) {
		int i = 0;
		for (Member member : members) {
			if (member.loginId.equals(loginId)) {
				return i;
			}
			i++;
		}
		return -1;
	}

	private int getArticleIndexById(int id) {
		int i = 0;
		for (Article article : articles) {
			if (article.id == id) {
				return i;
			}
			i++;
		}
		return -1;
	}

	private Article getArticleById(int id) {
		int index = getArticleIndexById(id);

		if (index != -1) {
			return articles.get(index);
		}

		return null;
	}

	private void makeTestData() {
		System.out.println("테스트를 위한 데이터를 생성합니다");
		articles.add(new Article(1, Util.getNowDateTimeStr(), Util.getNowDateTimeStr(), "제목1", "제목1", 11));
		articles.add(new Article(2, Util.getNowDateTimeStr(), Util.getNowDateTimeStr(), "제목2", "제목2", 22));
		articles.add(new Article(3, Util.getNowDateTimeStr(), Util.getNowDateTimeStr(), "제목3", "제목3", 33));
	}

}

굉장히 간략해진 Main 클래스

package com.KoreaIT.java.AM;

public class Main {
	public static void main(String[] args) {
		new App().start();
	}
}

dto 패키지를 만들어

 

Dto,Article,Member 클래스를 나눔

package com.KoreaIT.java.AM.dto;

public class Article extends Dto {
	public String title;
	public String body;
	public int hit;

	public Article(int id, String regDate, String updateDate, String title, String body) {
		this(id, regDate, updateDate, title, body, 0);
	}

	public Article(int id, String regDate, String updateDate, String title, String body, int hit) {
		this.id = id;
		this.regDate = regDate;
		this.updateDate = updateDate;
		this.title = title;
		this.body = body;
		this.hit = hit;
	}
}

//////////////////////


package com.KoreaIT.java.AM.dto;

public class Dto {
	public int id;
	public String regDate;
	public String updateDate;
}


///////////
package com.KoreaIT.java.AM.dto;

public class Member extends Dto {
	public String loginId;
	public String loginPw;
	public String name;

	public Member(int id, String regDate, String updateDate, String loginId, String loginPw, String name) {
		this.id = id;
		this.regDate = regDate;
		this.updateDate = updateDate;
		this.loginId = loginId;
		this.loginPw = loginPw;
		this.name = name;
	}
}

//////

Util 클래스의 util 패키지

package com.KoreaIT.java.AM.util;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Util {
	/** 포맷팅 현재 날짜/시간 반환 Str */
	public static String getNowDateTimeStr() {
		// 현재 날짜/시간
		LocalDateTime now = LocalDateTime.now();
		// 포맷팅
		String formatedNow = now.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
		// 포맷팅 현재 날짜/시간 출력

		return formatedNow;
	}
}