1、创建服务类
Student.php
namespace App\Service\School;
class Student
{
protected $TafficTool;
function __construct(WayToSchool $foot)
{
$this->TafficTool = $foot;
}
public function goToSchool()
{
$this->TafficTool->goToSchool();
}
}
WayToSchool.php
namespace App\Service\School;
interface WayToSchool
{
public function goToSchool();
}
Foot.php
namespace App\Service\School;
class Foot implements WayToSchool
{
public function goToSchool()
{
// TODO: Implement goToSchool() method.
echo "walk to school";
}
}
2、创建service provider
namespace App\Providers;
use App\Service\School;
use Illuminate\Support\ServiceProvider;
class StudentServiceProvider extends ServiceProvider
{
protected $defer = false;
/**
* Register services.
*
* @return void
*/
public function register()
{
$this->app->singleton(‘student‘,function(){
return new School\Student(new School\Bike());//不使用WayToSchoolServiceProvider.php 默认的 Foot,实现个性化的需求
});
//$this->app->singleton(‘Student‘,\App\Service\School\Student::class);//使用自动注入解决依赖
}
}
WayToSchool.php
namespace App\Providers;
use App\Service\School;
use Illuminate\Support\ServiceProvider;
class WayToSchoolServiceProvider extends ServiceProvider
{
public function register()
{
$this->app->singleton(School\WayToSchool::class,‘App\Service\School\Foot‘);//接口 App\Service\School\WayToSchool 默认使用App\Service\School\Foot去实例化
}
}
3、写到配置文件 config/app.php 的 providers数组
App\Providers\WayToSchoolServiceProvider::class,
App\Providers\StudentServiceProvider::class,
4、使用
routes/web.php
Route::get(‘std‘, function () {
app(‘student‘)->goToSchool();
})
输出：by bike to school