[BE5] 최현민

build.gradle

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+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.4.0'
+	id 'io.spring.dependency-management' version '1.1.6'
+}
+
+group = 'com.example'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(17)
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter'
+	implementation 'org.projectlombok:lombok'
+	compileOnly 'org.projectlombok:lombok:1.18.28'
+	implementation 'com.fasterxml.jackson.core:jackson-databind:2.15.2'
+
+	annotationProcessor 'org.projectlombok:lombok:1.18.28'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}

db/wiseSaying/1.json

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+{"id":1,"content":"1","author":"1"}

db/wiseSaying/2.json

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+{"id":2,"content":"2","author":"2"}

db/wiseSaying/3.json

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+{"id":3,"content":"3","author":"3"}

db/wiseSaying/data.json

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+[{"id":1,"content":"1","author":"1"},{"id":2,"content":"2","author":"2"}]

db/wiseSaying/lastId.txt

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+2

settings.gradle

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+rootProject.name = 'javaExamTest'

src/main/java/com/example/wisesaying/App.java

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+package com.example.wisesaying;
+
+import com.example.wisesaying.controller.WiseSayingController;
+import lombok.RequiredArgsConstructor;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+@RequiredArgsConstructor
+public class App {
+    private final WiseSayingController controller = new WiseSayingController();
+    private BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+    public void start() throws IOException {
+        String command = "";
+
+        System.out.println("== 명언 앱 ==");
+        while (true) {
+            System.out.println("명령) ");
+
+            command = br.readLine();
+            if (command.equals("등록")) {
+                controller.register();
+            } else if (command.equals("목록")) {
+                controller.getList();
+            } else if (command.equals("삭제")) {
+                controller.delete();
+            } else if (command.equals("수정")) {
+                controller.update();
+            } else if (command.equals("빌드")) {
+                controller.toBuild();
+            } else if (command.equals("종료")) {
+                break;
+            }
+
+        }
+        System.out.println("명령) 종료");
+    }
+}

src/main/java/com/example/wisesaying/Main.java

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+package com.example.wisesaying;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+import java.io.IOException;
+
+@SpringBootApplication
+public class Main {
+    public static void main(String[] args) throws IOException {
+        new App().start();
+    }
+
+}

src/main/java/com/example/wisesaying/controller/WiseSayingController.java

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+package com.example.wisesaying.controller;
+
+import com.example.wisesaying.service.WiseSayingService;
+import com.example.wisesaying.service.impl.WiseSayingServiceImpl;
+import org.springframework.stereotype.Controller;
+
+import java.io.IOException;
+
+//@RequiredArgsConstructor
+@Controller
+public class WiseSayingController{
+
+    private final WiseSayingService wiseSayingService = new WiseSayingServiceImpl();
+
+    // 등록
+    public void register() throws IOException {
+        wiseSayingService.register();
+    }
+
+    public void getList() {
+        wiseSayingService.getList();
+    }
+
+    public void delete() {
+        wiseSayingService.delete();
+    }
+
+    public void update() {
+        wiseSayingService.update();
+    }
+
+    public void toBuild() {
+        wiseSayingService.toBuild();
+    }
+}

src/main/java/com/example/wisesaying/domain/WiseSaying.java

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+package com.example.wisesaying.domain;
+
+import lombok.*;
+
+@Getter
+@Setter
+public class WiseSaying {
+
+    private long id;
+    private String content;
+    private String author;
+
+    public WiseSaying(long id, String content, String author) {
+        this.id = id;
+        this.content = content;
+        this.author = author;
+    }
+
+}

src/main/java/com/example/wisesaying/service/WiseSayingService.java

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+package com.example.wisesaying.service;
+
+import java.io.IOException;
+
+public interface WiseSayingService {
+
+    void register() throws IOException;
+
+    void getList();
+
+    void delete();
+
+    void update();
+
+    void toBuild();
+}

src/main/java/com/example/wisesaying/service/impl/WiseSayingServiceImpl.java

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+package com.example.wisesaying.service.impl;
+
+import com.example.wisesaying.domain.WiseSaying;
+import com.example.wisesaying.service.WiseSayingService;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.stereotype.Service;
+
+import java.io.*;
+import java.util.ArrayList;
+
+@Service
+public class WiseSayingServiceImpl implements WiseSayingService {
+
+    private final String DB_FOLDER = "db/wiseSaying";
+
+    private final ArrayList<WiseSaying> wiseSayingArrayList = new ArrayList<>();
+    private long n = 1;
+
+    private final ObjectMapper objectMapper = new ObjectMapper();
+
+    public WiseSayingServiceImpl() {
+        // db/wiseSaying 폴더 생성
+        File folder = new File(DB_FOLDER);
+        if (!folder.exists()) {
+            folder.mkdirs();
+        }
+
+        // lastId.txt 파일 생성 (없을 경우)
+        File lastIdFile = new File(DB_FOLDER + "/lastId.txt");
+        if (!lastIdFile.exists()) {
+            try (FileWriter writer = new FileWriter(lastIdFile)) {
+                writer.write("1"); // 초기값 1
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    // lastId.txt 수정
+    private void updateLastId(long id) throws IOException {
+        try (FileWriter writer = new FileWriter(DB_FOLDER + "/lastId.txt")) {
+            writer.write(String.valueOf(id));
+        }
+    }
+
+    /*// lastId.txt 읽기
+    private long getLastId() throws IOException {
+        String lastIdContent = new String(Files.readAllBytes(Paths.get(DB_FOLDER + "/lastId.txt")));
+        return Long.parseLong(lastIdContent.trim());
+    }*/
+
+    @Override
+    public void register() throws IOException {
+
+        String content = "";
+        String author = "";
+        try {
+            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+            content = br.readLine();
+            author = br.readLine();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        System.out.println("명언 : " + content);
+        System.out.println("작가 : " + author);
+        System.out.println(n + "번 명언이 등록되었습니다.");
+
+        wiseSayingArrayList.add(new WiseSaying(n, content, author));
+
+        // 파일생성
+        saveToFile(new WiseSaying(n, content, author));
+
+        File lastIdFile = new File(DB_FOLDER + "/lastId.txt");
+        if (lastIdFile.exists()) {
+            System.out.println("txt 파일 존재");
+            try {
+                updateLastId(n);
+                System.out.println(n);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+
+        n += 1;
+    }
+
+    // JSON 파일로 저장
+    private void saveToFile(WiseSaying wiseSaying) throws IOException {
+        File file = new File(DB_FOLDER + "/" + wiseSaying.getId() + ".json");
+        objectMapper.writeValue(file, wiseSaying);
+    }
+
+    @Override
+    public void getList() {
+        System.out.println("번호 / 작가 / 명언");
+        System.out.println("---------------------");
+
+        for (int i = wiseSayingArrayList.size() - 1; i >= 0; i--) {
+            WiseSaying w = wiseSayingArrayList.get(i);
+            System.out.println(w.getId() + " / " + w.getAuthor() + " / " + w.getContent());
+        }
+    }
+
+    @Override
+    public void delete() {
+        try {
+            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+            int number = Integer.parseInt(br.readLine());
+            for (int i = 0; i < wiseSayingArrayList.size(); i++) {
+                if (wiseSayingArrayList.get(i).getId() == number) {
+                    // 삭제하기
+                    wiseSayingArrayList.remove(i);
+                    System.out.println(number + "번 명언이 삭제되었습니다.");
+                    break;
+                } else {
+                    System.out.println(number + "번 명언은 존재하지 않습니다.");
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void update() {
+        try {
+            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+            int number = Integer.parseInt(br.readLine());
+            for (int i = 0; i < wiseSayingArrayList.size(); i++) {
+                if (wiseSayingArrayList.get(i).getId() == number) {
+                    // 수정하기
+                    System.out.println("명언(기존) : " + wiseSayingArrayList.get(i).getContent());
+                    String content = br.readLine();
+
+                    wiseSayingArrayList.get(i).setContent(content);
+
+                    System.out.println("명언 : " + content);
+
+                    System.out.println("작가(기존) : " + wiseSayingArrayList.get(i).getAuthor());
+
+                    String author = br.readLine();
+
+                    wiseSayingArrayList.get(i).setAuthor(author);
+                    System.out.println("작가 : " + author);
+
+                    break;
+                } else {
+                    System.out.println(number + "번 명언은 존재하지 않습니다.");
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void toBuild() {
+        try {
+            File file = new File(DB_FOLDER + "/" + "data" + ".json");
+            objectMapper.writeValue(file, wiseSayingArrayList);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        System.out.println("data.json 파일의 내용이 갱신되었습니다.");
+    }
+
+
+}

src/main/resources/application.properties

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+spring.application.name=javaExamTest

src/test/java/com/example/wisesaying/JavaExamTestApplicationTests.java

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+package com.example.wisesaying;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class JavaExamTestApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}