模型库、矢量文件

src/main/java/com/yj/earth/common/util/FileCommonUtil.java

@@ -0,0 +1,51 @@
+package com.yj.earth.common.util;
+
+import org.springframework.http.MediaType;
+import org.springframework.mock.web.MockMultipartFile;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+public class FileCommonUtil {
+
+    /**
+     * 将本地文件转换为 MultipartFile
+     */
+    public static MultipartFile convertToMultipartFile(File file) {
+        try (FileInputStream inputStream = new FileInputStream(file)) {
+            return new MockMultipartFile(
+                    "files",
+                    file.getName(),
+                    MediaType.APPLICATION_OCTET_STREAM_VALUE,
+                    inputStream
+            );
+        } catch (IOException e) {
+            return null;
+        }
+    }
+
+    public static MediaType getImageMediaType(String suffix) {
+        String lowerSuffix = suffix.toLowerCase();
+        switch (lowerSuffix) {
+            case ".jpg":
+            case ".jpeg":
+                return MediaType.IMAGE_JPEG;
+            case ".glb":
+                return MediaType.valueOf("model/gltf-binary");
+            case ".png":
+                return MediaType.IMAGE_PNG;
+            case ".gif":
+                return MediaType.IMAGE_GIF;
+            case ".bmp":
+                return MediaType.valueOf("image/bmp");
+            case ".webp":
+                return MediaType.valueOf("image/webp");
+            case ".svg":
+                return MediaType.valueOf("image/svg+xml");
+            default:
+                return MediaType.APPLICATION_OCTET_STREAM;
+        }
+    }
+}