如何在Laravel包中使用基于配置的连接

return [
    'default' => 'mysql',
    'connections' => [
        'mysql' => [
            'driver' => 'mysql',
            'host' => 'localhost',
            'database' => 'my_database',
            'username' => 'my_username',
            'password' => 'my_password',
            'charset' => 'utf8mb4',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
        ],
        // 可以定义更多的连接配置...
    ],
];

public function boot()
{
    $this->mergeConfigFrom(__DIR__.'/path/to/my-package.php', 'my-package');
}

$connection = config('my-package.connections.mysql');
DB::connection($connection)->select('SELECT * FROM my_table');