Feature: 직군 별 직무 조회 API 구현

module-api/src/main/java/kernel/jdon/jobcategory/controller/JobCategoryController.java

@@ -0,0 +1,24 @@
+package kernel.jdon.jobcategory.controller;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import kernel.jdon.dto.response.CommonResponse;
+import kernel.jdon.jobcategory.dto.response.FindListJobGroupResponse;
+import kernel.jdon.jobcategory.service.JobCategoryService;
+import lombok.RequiredArgsConstructor;
+
+@RestController
+@RequiredArgsConstructor
+public class JobCategoryController {
+	private final JobCategoryService jobCategoryService;
+
+	@GetMapping("/api/v1/job-categories")
+	public ResponseEntity<CommonResponse> getJobGroupList() {
+		FindListJobGroupResponse jobGroupList = jobCategoryService.findJobGroupList();
+
+		return ResponseEntity.ok(CommonResponse.of(jobGroupList));
+	}
+
+}

module-api/src/main/java/kernel/jdon/jobcategory/dto/response/FindListJobGroupResponse.java

@@ -0,0 +1,57 @@
+package kernel.jdon.jobcategory.dto.response;
+
+import java.util.List;
+import java.util.Map;
+
+import kernel.jdon.jobcategory.domain.JobCategory;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class FindListJobGroupResponse {
+	private List<FindJobGroupResponse> jobGroupList;
+
+	public FindListJobGroupResponse(List<JobCategory> jobGroupList, Map<Long, List<JobCategory>> jobCategoryMap) {
+		this.jobGroupList = jobGroupList.stream()
+			.map(jobGroup -> FindJobGroupResponse.of(jobGroup, jobCategoryMap.get(jobGroup.getId())))
+			.toList();
+	}
+
+	@Getter
+	@Builder
+	@AllArgsConstructor
+	public static class FindJobGroupResponse {
+		private Long id;
+		private String name;
+		private List<FindJobCategoryResponse> jobCategoryList;
+
+		public static FindJobGroupResponse of(JobCategory jobCategory, List<JobCategory> jobCategoryList) {
+			List<FindJobCategoryResponse> list = jobCategoryList.stream()
+				.map(FindJobCategoryResponse::of)
+				.toList();
+
+			return FindJobGroupResponse.builder()
+				.id(jobCategory.getId())
+				.name(jobCategory.getName())
+				.jobCategoryList(list)
+				.build();
+		}
+	}
+
+	@Getter
+	@Builder
+	@AllArgsConstructor
+	public static class FindJobCategoryResponse {
+		private Long id;
+		private String name;
+
+		public static FindJobCategoryResponse of(JobCategory jobCategory) {
+			return FindJobCategoryResponse.builder()
+				.id(jobCategory.getId())
+				.name(jobCategory.getName())
+				.build();
+		}
+	}
+}

module-api/src/main/java/kernel/jdon/jobcategory/repository/JobCategoryRepository.java

@@ -1,4 +1,10 @@
 package kernel.jdon.jobcategory.repository;
 
+import java.util.List;
+
+import kernel.jdon.jobcategory.domain.JobCategory;
+
 public interface JobCategoryRepository extends JobCategoryDomainRepository {
+	List<JobCategory> findByParentIdIsNull();
+	List<JobCategory> findByParentId(Long pareantId);
 }

module-api/src/main/java/kernel/jdon/jobcategory/service/JobCategoryService.java

@@ -0,0 +1,27 @@
+package kernel.jdon.jobcategory.service;
+
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import org.springframework.stereotype.Service;
+
+import kernel.jdon.jobcategory.domain.JobCategory;
+import kernel.jdon.jobcategory.dto.response.FindListJobGroupResponse;
+import kernel.jdon.jobcategory.repository.JobCategoryRepository;
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class JobCategoryService {
+	private final JobCategoryRepository jobCategoryRepository;
+
+	public FindListJobGroupResponse findJobGroupList() {
+		List<JobCategory> findJobGroupList = jobCategoryRepository.findByParentIdIsNull();
+		Map<Long, List<JobCategory>> groupedCategoryList = findJobGroupList.stream()
+			.collect(Collectors.toMap(JobCategory::getId, jobGroup ->
+				jobCategoryRepository.findByParentId(jobGroup.getId())));
+
+		return new FindListJobGroupResponse(findJobGroupList, groupedCategoryList);
+	}
+}