feat: 로컬 storage 구현

src/main/java/com/j9/bestmoments/service/LocalStorageService.java

@@ -0,0 +1,35 @@
+package com.j9.bestmoments.service;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+@Service
+@Slf4j
+public class LocalStorageService implements StorageService {
+
+    @Value("${storage.local.dir}")
+    private String dir;
+
+    @Override
+    public String uploadFile(MultipartFile file, String fileName) {
+        try {
+            Path path = Paths.get(dir + fileName);
+            if (!path.toFile().exists()) {
+                path.toFile().mkdirs();
+            }
+            File destinationFile = new File(dir, fileName);
+            file.transferTo(destinationFile);
+            return destinationFile.getAbsolutePath();
+
+        } catch (IOException e) {
+            e.printStackTrace();
+            return "파일 업로드에 실패했습니다.";
+        }
+    }
+}

src/main/java/com/j9/bestmoments/service/VideoService.java

@@ -25,7 +25,7 @@
 public class VideoService {
 
     private final VideoRepository videoRepository;
-    private final StorageService storageService;
+    private final LocalStorageService storageService;
 
     @Transactional
     public Video upload(Member member, VideoCreateDto createDto) {