如何在3.1版本的laravel excel中设置要导出的自定义数值

composer require maatwebsite/excel

<?php

namespace App\Exports;

use Maatwebsite\Excel\Concerns\FromCollection;

class CustomExport implements FromCollection
{
    public function collection()
    {
        // 在这里获取要导出的自定义数据集合，并返回
    }
}

<?php

namespace App\Http\Controllers;

use App\Exports\CustomExport;
use Maatwebsite\Excel\Facades\Excel;

class ExportController extends Controller
{
    public function export()
    {
        return Excel::download(new CustomExport, 'custom_data.xlsx');
    }
}

<a href="{{ route('export') }}">导出Excel</a>