修改获取文件类型bug

src/Tools/ExcelImporter.php

@@ -53,9 +53,9 @@ class ExcelImporter
     public function __construct($file, $sheetIndex = 0)
     {
         $this->config = container(ConfigInterface::class);
+        $this->fileType = ucfirst($file->getExtension());
         $this->rootPath = $this->config->get('server.settings.document_root', BASE_PATH . '/public');
         $path = UploadManager::uploadExcelGetRealPath($file);
-        $this->fileType = ucfirst(strtolower(pathinfo($file, PATHINFO_EXTENSION)));
         $this->reader = IOFactory::createReaderForFile($path)->load($path);
         $this->filePath = $path;
         $this->sheet = $this->reader->getSheet($sheetIndex);