命令模式

命令，我们知道有命令、命令者、和被命令者。代码如下：

public class Command {    //命令模式 本来很简单的一句话的事为啥要整个模式，这个模式最主要的是命令者和被命令者的分离    public interface command {//命令接口        void exe();    }    public static class MyCommand implements command {        private Receiver receiver;        public MyCommand(Receiver receiver) {            this.receiver = receiver;        }        @Override        public void exe() {            receiver.action();        }    }    public static class Receiver {//被命令者        public void action() {            System.out.println("command received!");        }    }    public static void main(String[] args) {        Receiver receiver = new Receiver();        command cmd = new MyCommand(receiver);//也可用set形式使被命令者与命令隔离        //这样我就可以把cmd命令到处传，谁想调都行        cmd.exe();//命令者调用    }}输出：command received!

觉得容易理解的话面向对象的23种设计模式点这里