php，java实现命令模式

public abstract class AbsReceiver {

public abstract void doSomething();
}

public class RealReceiver1 extends AbsReceiver {

@Override
public void doSomething() {

}
}

public class RealReceiver2 extends AbsReceiver {

@Override
public void doSomething() {

}
}

public abstract class AbsCommand {

protected AbsReceiver receiver;

public AbsCommand(AbsReceiver receiver){
this.receiver = receiver;
}

public abstract void exe();

}

public class RealCommand1 extends AbsCommand {

public RealCommand1() {
super(new RealReceiver1());
}

@Override
public void exe() {
receiver.doSomething();
}
}

ublic class RealCommand2 extends AbsCommand {

public RealCommand2(){
super(new RealReceiver2());
}

@Override
public void exe() {

}
}

public class Invoke {

private AbsCommand command;

public void setCommand(AbsCommand command){
this.command = command;
}

public void action(){
command.exe();
}
}

abstract class AbsReceiver
{
public abstract function doSomething();
}

class RealReceiver1 extends AbsReceiver
{
public function doSomething()
{
echo 'RealReceiver1';
}
}

class RealReceiver2 extends AbsReceiver
{
public function doSomething()
{
echo 'RealReceiver2';
}
}

abstract class Command
{
protected $receiver;

public function __construct(AbsReceiver $receiver)
{
$this->receiver = $receiver;
}

public abstract function exe();
}

class RealCommand1 extends Command
{
public function __construct()
{
parent::__construct(new RealReceiver1);
}

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

class RealComand2 extends Command
{
public function __construct()
{
parent::__construct(new RealReceiver2);
}

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

class Invoke
{
private $command;

public function __set($name,$value)
{
if('command' == $name)
{
$this->command = $value;
}
}

public function __get($name)
{
if('command' == $name)
{
return $this->command;
}
}

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

$realCommand = new RealCommand1;

$invoke = new Invoke;
$invoke->command = $realCommand;
$invoke->action();