设计模式之命令模式

public abstract class Command {

protected Receiver receiver;

public Command(Receiver receiver) {
this.receiver = receiver;
}

public abstract void execute();
}
public class ConcreteCommand extends Command {

public ConcreteCommand(Receiver receiver) {
super(receiver);
}

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

}
public class Receiver {

public void action() {
// TODO Auto-generated method stub
System.out.println("执行请求");
}

}

public class Invoker {

private Command command;

public void setCommand(Command command) {

this.command = command;
}

public void executeCommand() {
command.execute();
}
}

public class Client {

public static void main(String[] args) {

Receiver r = new Receiver();

Command c = new ConcreteCommand(r);

Invoker i = new Invoker();

i.setCommand(c);

i.executeCommand();
}
}