php artisan migrate时报错

执行完php artisan make:auth，再执行php artisan migrate时，报错
SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes，解决方法：
在AppServiceProvider中

use Illuminate\Support\Facades\Schema; //import Schema

public function boot()
{
//
Schema::defaultStringLength(191);
}