我应该在Laravel 5中使用什么依赖注入或绑定？

class ExampleController extends Controller
{
    protected $dependency;

    public function __construct(Dependency $dependency)
    {
        $this->dependency = $dependency;
    }

    public function index()
    {
        // 使用注入的依赖项
        $this->dependency->doSomething();
    }
}

class ExampleController extends Controller
{
    public function index(Dependency $dependency)
    {
        // 使用注入的依赖项
        $dependency->doSomething();
    }
}

app()->bind(Interface::class, ConcreteImplementation::class);

app()->when(ExampleController::class)
    ->needs(DependencyInterface::class)
    ->give(ConcreteDependency::class);