命令模式

package Command;
/***
 * 真正命令的执行者
 * @author zw
 *
 */
public class Receiver {
	public void action() {
		System.out.println("执行动作");
	}
}

package Command;

public interface Command {
	void execute();
}



class ConcreteCommand implements Command{
	
	private Receiver receiver;
	
	public ConcreteCommand(Receiver receiver) {
		super();
		this.receiver = receiver;
	}

	@Override
	public void execute() {
		// TODO Auto-generated method stub
		receiver.action();
	}
	
}

package Command;
/***
 * 调用者和发起者
 * @author zw
 *
 */
public class Invoke {
	private Command command;

	public Invoke(Command command) {
		super();
		this.command = command;
	}
	
	public void call() {
		command.execute();
	}
	
	
}

package Command;

public class Client {
	public static void main(String[] args) {
		
		Receiver r = new Receiver();
		Command command = new ConcreteCommand(r);
		Invoke i = new Invoke(command);
		
		i.call();
		
	}
}