设计模式——命令模式

说明

示例

下面看下命令模式的代码实现

// 创建接口Command
interface Command{
    public function exe();
}

class Receiver{
    public function action(){
        echo "command received!";
    }
}

// 类MyCommand实现接口Command
class MyCommand implements Command{
    private Receiver $receiver;
    public function __construct(Receiver $receiver){
        $this->receiver = $receiver;
    }

    public function exe(){
        $this->receiver->action();
    }
}

class Invoker{
    private Command $command;
    public function __construct(Command $command){
        $this->command = $command;
    }
    public function action(){
        $this->command->exe();
    }
}


// 调用
$receiver = new Receiver();
$cmd = new MyCommand($receiver);
$invoker = new Invoker($cmd);
$invoker->action();
// 创建接口Command
interface Command{
    public function exe();
}

class Receiver{
    public function action(){
        echo "command received!";
    }
}

// 类MyCommand实现接口Command
class MyCommand implements Command{
    private Receiver $receiver;
    public function __construct(Receiver $receiver){
        $this->receiver = $receiver;
    }

    public function exe(){
        $this->receiver->action();
    }
}

class Invoker{
    private Command $command;
    public function __construct(Command $command){
        $this->command = $command;
    }
    public function action(){
        $this->command->exe();
    }
}


// 调用
$receiver = new Receiver();
$cmd = new MyCommand($receiver);
$invoker = new Invoker($cmd);
$invoker->action();
// output:  command received!

总结