更新文件名验证规则

src/Library/Validate.php

@@ -507,6 +507,6 @@ class Validate
      * @return false|int
      */
     public function isValidFileName($name) {
-        return preg_match("/^[\x7f-\xffA-Za-z0-9_\.]+$/", $name);
+        return $name != "" && preg_match("/^[\x7f-\xffA-Za-z0-9_\s\.]+[^\.|\s]$/", $name);
     }
 }