1，/cofig/project.php  设置允许的文件后缀

2，

\app\commonlservice\UploadService.php

// 校验上传文件后缀

        $limit = array_merge(config('project.file_image'), config('project.file_video'), config('project.file_excel'), config('project.file_files'));

        if (!in_array(strtolower($this->file->extension()), $limit)) {

            throw new Exception('不允许上传' . $this->file->extension() . '后缀文件');