[WIP] CRUD 작성 중

build.gradle

@@ -14,6 +14,7 @@ repositories {
 
 dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.projectlombok:lombok:1.18.12'
     testImplementation('org.springframework.boot:spring-boot-starter-test') {
         exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
     }

src/main/java/com/example/javaweb/controller/BookController.java

@@ -0,0 +1,35 @@
+package com.example.javaweb.controller;
+
+import com.example.javaweb.model.Board;
+import com.example.javaweb.service.BookService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/v1/books")
+public class BookController {
+
+    @Autowired
+    BookService bookService;
+
+    @GetMapping
+    public List<Board> readBoard() {
+        return bookService.selectAll();
+    }
+
+    @PostMapping
+    public Board createBoard(@RequestBody Board board) {
+        return bookService.create(board);
+    }
+
+    @PutMapping("/{id}")
+    public Board editBoard(@PathVariable Long id, @RequestBody Board updateData) {
+        return bookService.update(id, updateData);
+    }
+
+    @DeleteMapping("/{id}")
+    public void deleteBoard(@PathVariable Long id) {
+        bookService.delete(id);
+    }
+}

src/main/java/com/example/javaweb/db/Repository.java

@@ -0,0 +1,36 @@
+package com.example.javaweb.db;
+
+import com.example.javaweb.model.Board;
+import org.springframework.stereotype.Component;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@Component
+public class Repository {
+    private Map<Long, Board> map = new HashMap<>();
+    private Long idCount = 1L;
+
+    public Board save(Board board) {
+        map.put(idCount++, board);
+        return board;
+    }
+
+    public Board update(Long id, Board board) {
+        map.put(id, board);
+        return board;
+    }
+
+    public Board get(Long id) {
+        return map.get(id);
+    }
+
+    public void delete(Long id) {
+        map.remove(id);
+    }
+
+    public List<Board> getAll() {
+        return new ArrayList<>(map.values());
+    }
+}

src/main/java/com/example/javaweb/model/Board.java

@@ -0,0 +1,11 @@
+package com.example.javaweb.model;
+
+import lombok.Data;
+
+@Data
+public class Board {
+    public Long id;
+    public String subject;
+    public String content;
+    public String writer;
+}

src/main/java/com/example/javaweb/service/BookService.java

@@ -0,0 +1,35 @@
+package com.example.javaweb.service;
+
+import com.example.javaweb.db.Repository;
+import com.example.javaweb.model.Board;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class BookService {
+
+    @Autowired
+    private Repository repository;
+
+    public Board create(Board board) {
+        return repository.save(board);
+    }
+
+    public void delete(Long id) {
+        repository.delete(id);
+    }
+
+    public Board update(Long id, Board updateData) {
+        Board updatedBoard =  repository.get(id);
+        if (updateData.content != null) updatedBoard.content = updateData.content;
+        if (updateData.subject != null) updatedBoard.subject = updateData.subject;
+        if (updateData.writer != null) updatedBoard.writer = updateData.writer;
+        return repository.update(id, updatedBoard);
+    }
+
+    public List<Board> selectAll() {
+        return repository.getAll();
+    }
+}