laravel excel 笔记 writeType和readers,

private static $readers = [
    'Xlsx' => Reader\Xlsx::class,
    'Xls' => Reader\Xls::class,
    'Xml' => Reader\Xml::class,
    'Ods' => Reader\Ods::class,
    'Slk' => Reader\Slk::class,
    'Gnumeric' => Reader\Gnumeric::class,
    'Html' => Reader\Html::class,
    'Csv' => Reader\Csv::class,
];

private static $writers = [
    'Xls' => Writer\Xls::class,
    'Xlsx' => Writer\Xlsx::class,
    'Ods' => Writer\Ods::class,
    'Csv' => Writer\Csv::class,
    'Html' => Writer\Html::class,
    'Tcpdf' => Writer\Pdf\Tcpdf::class,
    'Dompdf' => Writer\Pdf\Dompdf::class,
    'Mpdf' => Writer\Pdf\Mpdf::class,
];Copy