[BE-FEAT] 아이템 도감 API get 구현

backend/pokerogue/src/main/java/com/pokerogue/helper/item/controller/ItemController.java

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+package com.pokerogue.helper.item.controller;
+
+import com.pokerogue.helper.item.dto.ItemResponse;
+import com.pokerogue.helper.item.service.ItemService;
+import com.pokerogue.helper.util.dto.ApiResponse;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+
+
+@Controller
+@RequiredArgsConstructor
+public class ItemController {
+
+    private final ItemService itemService;
+
+    @GetMapping("/api/v1/items")
+    public ApiResponse<List<ItemResponse>> itemList() {
+        return new ApiResponse<>("아이템 리스트 불러오기에 성공했습니다.", itemService.findAll());
+    }
+
+    @GetMapping("/api/v1/item/{id}")
+    public ApiResponse<ItemResponse> itemDetails(@PathVariable("id") String id) {
+        return new ApiResponse<>("아이템 정보 불러오기에 성공했습니다.", itemService.findById(id));
+    }
+
+}

backend/pokerogue/src/main/java/com/pokerogue/helper/item/data/Item.java

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+package com.pokerogue.helper.item.data;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.Document;
+import org.springframework.data.mongodb.core.mapping.Field;
+
+@Getter
+@Document(collection = "item")
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Item {
+
+    @Id
+    private String id;
+
+    @Id
+    private String imageId;
+
+    @Field("name")
+    private String name;
+
+    @Field("koName")
+    private String koName;
+
+    @Field("description")
+    private String description;
+}

backend/pokerogue/src/main/java/com/pokerogue/helper/item/dto/ItemResponse.java

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+package com.pokerogue.helper.item.dto;
+
+import com.pokerogue.helper.item.data.Item;
+
+public record ItemResponse(String id, String imageId, String koName, String description) {
+
+    public static ItemResponse from(Item item) {
+        return new ItemResponse(item.getId(), item.getImageId(), item.getKoName(), item.getDescription());
+    }
+}

backend/pokerogue/src/main/java/com/pokerogue/helper/item/repository/ItemRepository.java

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+package com.pokerogue.helper.item.repository;
+
+import com.pokerogue.helper.item.data.Item;
+import org.springframework.data.mongodb.repository.MongoRepository;
+
+public interface ItemRepository extends MongoRepository<Item,String> {
+}

backend/pokerogue/src/main/java/com/pokerogue/helper/item/service/ItemService.java

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+package com.pokerogue.helper.item.service;
+
+
+import com.pokerogue.helper.global.exception.ErrorMessage;
+import com.pokerogue.helper.global.exception.GlobalCustomException;
+import com.pokerogue.helper.item.dto.ItemResponse;
+import com.pokerogue.helper.item.repository.ItemRepository;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class ItemService {
+
+    private final ItemRepository itemRepository;
+
+    public List<ItemResponse> findAll() {
+        return itemRepository.findAll().stream()
+                .map(ItemResponse::from)
+                .toList();
+    }
+
+    public ItemResponse findById(String id) {
+        return itemRepository.findById(id)
+                .map(ItemResponse::from)
+                .orElseThrow(() -> new GlobalCustomException(ErrorMessage.ITEM_NOT_FOUND));
+    }
+}