laravel下载文件

public function jobDownload(){
    $realPath = public_path('download/job/postForm.xls');
    $filename = '应聘表格.xls';
    $headers=[
        "Content-Disposition"=>"attachment; filename=".$filename,
        "Content-Transfer-Encoding"=>" binary",
        "Content-Type"=>" application/xls"
        ];

    return response()->download($realPath,$filename,$headers);
}

黄色部分，文件真实名一定要用中文，否则找不到文件！