★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;
}
}
