fix: 修复文件上传接口

src/main/java/com/petstore/controller/FileController.java

@@ -17,7 +17,9 @@ import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.time.LocalDate;
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
+import java.util.Set;
 import java.util.UUID;
 
 @RestController
@@ -25,10 +27,43 @@ import java.util.UUID;
 @RequiredArgsConstructor
 @CrossOrigin
 public class FileController {
-    
+
+    private static final Set<String> IMAGE_EXT = Set.of(
+            ".jpg", ".jpeg", ".png", ".gif", ".webp", ".bmp", ".heic", ".heif", ".jpe"
+    );
+    private static final Set<String> VIDEO_EXT = Set.of(
+            ".mp4", ".mov", ".m4v", ".webm", ".avi", ".mkv", ".3gp"
+    );
+
     @Value("${upload.path:uploads/}")
     private String uploadPath;
 
+    /**
+     * 微信小程序 uni.uploadFile 常为 application/octet-stream；须优先认扩展名，再认 MIME。
+     */
+    static boolean isAllowedMediaType(String contentType, String originalFilename) {
+        if (hasMediaExtension(originalFilename)) {
+            return true;
+        }
+        if (contentType == null || contentType.isBlank()) {
+            return false;
+        }
+        String ct = contentType.toLowerCase(Locale.ROOT).trim();
+        if (ct.startsWith("image/") || ct.startsWith("video/")) {
+            return true;
+        }
+        // 微信客户端上传常见：无正确 MIME，按二进制传
+        return "application/octet-stream".equals(ct);
+    }
+
+    private static boolean hasMediaExtension(String originalFilename) {
+        if (originalFilename == null || !originalFilename.contains(".")) {
+            return false;
+        }
+        String ext = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase(Locale.ROOT);
+        return IMAGE_EXT.contains(ext) || VIDEO_EXT.contains(ext);
+    }
+
     @GetMapping("/image/**")
     public ResponseEntity<Resource> getImage(HttpServletRequest request) throws IOException {
         String path = request.getRequestURI().replace("/api/upload/image", "");
@@ -70,15 +105,15 @@ public class FileController {
             return result;
         }
         
+        String originalFilename = file.getOriginalFilename();
         String contentType = file.getContentType();
-        boolean isImage = contentType != null && contentType.startsWith("image/");
+
-        boolean isVideo = contentType != null && contentType.startsWith("video/");
+        if (!isAllowedMediaType(contentType, originalFilename)) {
-        if (!isImage && !isVideo) {
             result.put("code", 400);
             result.put("message", "只能上传图片或视频");
             return result;
         }
-        
+
         try {
             // 创建上传目录
             String datePath = LocalDate.now().toString().replace("-", "/");
@@ -87,16 +122,26 @@ public class FileController {
             if (!dir.exists()) dir.mkdirs();
             
             // 生成文件名
-            String originalFilename = file.getOriginalFilename();
             String ext = "";
             if (originalFilename != null && originalFilename.contains(".")) {
-                ext = originalFilename.substring(originalFilename.lastIndexOf("."));
+                ext = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase(Locale.ROOT);
+                if (ext.length() > 10) {
+                    ext = "";
+                }
+            }
+            if (ext.isEmpty()) {
+                boolean looksVideo = contentType != null && contentType.toLowerCase(Locale.ROOT).startsWith("video/");
+                // application/octet-stream 且无扩展名时，大文件更可能是视频
+                if (!looksVideo && "application/octet-stream".equalsIgnoreCase(String.valueOf(contentType).trim())) {
+                    looksVideo = file.getSize() > 3 * 1024 * 1024L;
+                }
+                ext = looksVideo ? ".mp4" : ".jpg";
             }
             String filename = UUID.randomUUID().toString().replace("-", "") + ext;
             
-            // 保存文件
+            // 保存文件（流式写入，避免大视频一次性进内存）
             Path filePath = Paths.get(dirPath, filename);
-            Files.write(filePath, file.getBytes());
+            file.transferTo(filePath.toFile());
             
             // 返回访问URL（/api/upload/image/ + 日期路径 + 文件名）
             String url = "/api/upload/image/" + datePath + "/" + filename;