[ci/cd] add code style checker workflow

.github/workflows/code-style-test.yml

@@ -0,0 +1,43 @@
+name: Java Code Style Check
+
+on:
+  pull_request:
+    branches: ['**']
+  push:
+    branches: ['**']
+  workflow_dispatch:
+
+jobs:
+  style-check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v3
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Run Spotless and Checkstyle
+        run: |
+          set -e
+          ./gradlew spotlessCheck --no-daemon
+          ./gradlew checkstyleMain checkstyleTest --no-daemon
+        shell: bash
+
+      - name: Show summary
+        run: |
+          if [ $? -eq 0 ]; then
+            echo "🎉 Code style checks passed!"
+          else
+            echo "❌ Code style violations detected!"
+            echo "Please run './gradlew spotlessApply' locally and fix Checkstyle issues."
+            exit 1
+          fi
+        shell: bash

build.gradle

@@ -2,6 +2,7 @@ plugins {
 	id 'java'
 	id 'org.springframework.boot' version '3.5.7'
 	id 'io.spring.dependency-management' version '1.1.7'
+	id 'com.diffplug.spotless' version '6.25.0'
 }
 
 group = 'opensource'
@@ -64,3 +65,27 @@ dependencies {
 tasks.named('test') {
 	useJUnitPlatform()
 }
+
+apply plugin: 'checkstyle'
+
+checkstyle {
+	toolVersion = '10.12.0'
+	configFile = file('config/checkstyle/google_checks.xml')
+}
+
+tasks.withType(Checkstyle) {
+	reports {
+		xml.required.set(true)
+		html.required.set(true)
+	}
+}
+
+// Spotless 적용
+apply plugin: 'com.diffplug.spotless'
+
+spotless {
+	java {
+		googleJavaFormat()
+		target 'src/**/*.java'
+	}
+}

config/checkstyle/google_checks.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+        "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<module name="Checker">
+    <module name="TreeWalker">
+        <!-- 최소 규칙만 적용 -->
+    </module>
+</module>

src/main/java/opensource/bravest/BravestApplication.java

@@ -6,8 +6,7 @@
 @SpringBootApplication
 public class BravestApplication {
 
-	public static void main(String[] args) {
-		SpringApplication.run(BravestApplication.class, args);
-	}
-
+  public static void main(String[] args) {
+    SpringApplication.run(BravestApplication.class, args);
+  }
 }

src/main/java/opensource/bravest/domain/chatList/controller/ChatListController.java

@@ -1,9 +1,12 @@
 package opensource.bravest.domain.chatList.controller;
 
+import static opensource.bravest.domain.chatList.dto.ChatListDto.ChatListCreateRequest;
 import static opensource.bravest.domain.chatList.dto.ChatListDto.ChatListResponse;
 import static opensource.bravest.domain.chatList.dto.ChatListDto.ChatListUpdateRequest;
-import static opensource.bravest.domain.chatList.dto.ChatListDto.ChatListCreateRequest;
 
+import jakarta.validation.Valid;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
 import opensource.bravest.domain.chatList.service.ChatListService;
 import opensource.bravest.global.apiPayload.ApiResponse;
 import org.springframework.web.bind.annotation.DeleteMapping;
@@ -15,47 +18,42 @@
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
-import lombok.RequiredArgsConstructor;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.ResponseEntity;
-import jakarta.validation.Valid;
-import java.util.List;
-
 @RestController
 @RequestMapping("/chatlists")
 @RequiredArgsConstructor
 public class ChatListController {
 
-    private final ChatListService chatListService;
-
-    @PostMapping
-    public ApiResponse<ChatListResponse> createChatList(@Valid @RequestBody ChatListCreateRequest request) {
-        ChatListResponse response = chatListService.createChatList(request);
-        return ApiResponse.onSuccess(response);
-    }
-
-    @GetMapping("/room/{roomId}")
-    public ApiResponse<List<ChatListResponse>> getChatListsByRoomId(@PathVariable Long roomId) {
-        List<ChatListResponse> response = chatListService.getChatListsByRoomId(roomId);
-        return ApiResponse.onSuccess(response);
-    }
-
-    @GetMapping("/{id}")
-    public ApiResponse<ChatListResponse> getChatListById(@PathVariable Long id) {
-        ChatListResponse response = chatListService.getChatListById(id);
-        return ApiResponse.onSuccess(response);
-    }
-
-    @PutMapping("/{id}")
-    public ApiResponse<ChatListResponse> updateChatList(@PathVariable Long id,
-                                                           @Valid @RequestBody ChatListUpdateRequest request) {
-        ChatListResponse response = chatListService.updateChatList(id, request);
-        return ApiResponse.onSuccess(response);
-    }
-
-    @DeleteMapping("/{id}")
-    public ApiResponse<Void> deleteChatList(@PathVariable Long id) {
-        chatListService.deleteChatList(id);
-        return ApiResponse.onSuccess(null);
-    }
-}
+  private final ChatListService chatListService;
+
+  @PostMapping
+  public ApiResponse<ChatListResponse> createChatList(
+      @Valid @RequestBody ChatListCreateRequest request) {
+    ChatListResponse response = chatListService.createChatList(request);
+    return ApiResponse.onSuccess(response);
+  }
+
+  @GetMapping("/room/{roomId}")
+  public ApiResponse<List<ChatListResponse>> getChatListsByRoomId(@PathVariable Long roomId) {
+    List<ChatListResponse> response = chatListService.getChatListsByRoomId(roomId);
+    return ApiResponse.onSuccess(response);
+  }
+
+  @GetMapping("/{id}")
+  public ApiResponse<ChatListResponse> getChatListById(@PathVariable Long id) {
+    ChatListResponse response = chatListService.getChatListById(id);
+    return ApiResponse.onSuccess(response);
+  }
+
+  @PutMapping("/{id}")
+  public ApiResponse<ChatListResponse> updateChatList(
+      @PathVariable Long id, @Valid @RequestBody ChatListUpdateRequest request) {
+    ChatListResponse response = chatListService.updateChatList(id, request);
+    return ApiResponse.onSuccess(response);
+  }
+
+  @DeleteMapping("/{id}")
+  public ApiResponse<Void> deleteChatList(@PathVariable Long id) {
+    chatListService.deleteChatList(id);
+    return ApiResponse.onSuccess(null);
+  }
+}

src/main/java/opensource/bravest/domain/chatList/dto/ChatListDto.java

@@ -1,53 +1,51 @@
 package opensource.bravest.domain.chatList.dto;
 
-import jakarta.validation.constraints.NotBlank;
-import jakarta.validation.constraints.NotNull;
+import java.time.LocalDateTime;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.Setter;
 import opensource.bravest.domain.chatList.entity.ChatList;
 
-import java.time.LocalDateTime;
 public class ChatListDto {
 
-    // 1. 아이디어 생성 요청 DTO (Create Request)
-    @Getter
-    @Setter
-    public static class ChatListCreateRequest {
-
-        private Long roomId;
-
-        private String content;
-
-        private Long registeredBy;
-    }
-
-    // 2. 아이디어 수정 요청 DTO (Update Request)
-    @Getter
-    @Setter
-    public static class ChatListUpdateRequest {
-
-        // 아이디어 내용 수정만 가정
-        private String content;
-    }
-
-    @Getter
-    @Builder
-    public static class ChatListResponse {
-        private Long id;
-        private Long roomId;
-        private String content;
-        private Long registeredBy;
-        private LocalDateTime createdAt;
-
-        public static ChatListResponse fromEntity(ChatList chatList) {
-            return ChatListResponse.builder()
-                .id(chatList.getId())
-                .roomId(chatList.getRoomId())
-                .content(chatList.getContent())
-                .registeredBy(chatList.getRegisteredBy().getId())
-                .createdAt(chatList.getCreatedAt())
-                .build();
-        }
+  // 1. 아이디어 생성 요청 DTO (Create Request)
+  @Getter
+  @Setter
+  public static class ChatListCreateRequest {
+
+    private Long roomId;
+
+    private String content;
+
+    private Long registeredBy;
+  }
+
+  // 2. 아이디어 수정 요청 DTO (Update Request)
+  @Getter
+  @Setter
+  public static class ChatListUpdateRequest {
+
+    // 아이디어 내용 수정만 가정
+    private String content;
+  }
+
+  @Getter
+  @Builder
+  public static class ChatListResponse {
+    private Long id;
+    private Long roomId;
+    private String content;
+    private Long registeredBy;
+    private LocalDateTime createdAt;
+
+    public static ChatListResponse fromEntity(ChatList chatList) {
+      return ChatListResponse.builder()
+          .id(chatList.getId())
+          .roomId(chatList.getRoomId())
+          .content(chatList.getContent())
+          .registeredBy(chatList.getRegisteredBy().getId())
+          .createdAt(chatList.getCreatedAt())
+          .build();
     }
-}
+  }
+}