实现WithHeadings，并将其定义为数组：

class UsersExport implements FromCollection,WithHeadings {

      public function headings(): array {
          return [
              "name","mobile","email"
          ];
      }

..
检查此示例：https://makitweb.com/export-data-in-excel-and-csv-format-with-laravel-excel/

在FormCollection之后实现WithHeadings并定义标头。

<?php
    namespace App\Exports;
    use App\User;
    use App\Models\Models\Energy;
    use Maatwebsite\Excel\Concerns\FromCollection;
    use Maatwebsite\Excel\Concerns\WithHeadings;
    
    class UsersExport implements FromCollection, WithHeadings
    {
        public function collection()
        {
            return Energy::all();
        }
    
        public function headings(): array
        {
            return ["First Name", "Last Name", "Contact", "Address", "Gender"];
        }
    }