打开配置文件：textlaravel.cc\laravel5\config\admin.php
修改路由前缀：'prefix' => env('ADMIN_ROUTE_PREFIX', 'willem'),
/*
|--------------------------------------------------------------------------
| dcat-admin route settings
|--------------------------------------------------------------------------
|
| The routing configuration of the admin page, including the path prefix,
| the controller namespace, and the default middleware. If you want to
| access through the root path, just set the prefix to empty string.
|
*/
'route' => [
'domain' => env('ADMIN_ROUTE_DOMAIN'),
'prefix' => env('ADMIN_ROUTE_PREFIX', 'willem'),
'namespace' => 'App\\Admin\\Controllers',
'middleware' => ['web', 'admin'],
'enable_session_middleware' => false,
],访问地址：
