命令模式

浅浅的花香味﹌ 2022-06-06 00:05 65阅读 0赞

![这里写图片描述][SouthEast]

/** * 士兵 * @author Administrator * */
    public class Soldier { 
        private  String attach;
    
        private  String back;
    
        public String getAttach() {
            return attach;
        }
    
        public void setAttach(String attach) {
            this.attach = attach;
        }
    
        public String getBack() {
            return back;
        }
    
        public void setBack(String back) {
            this.back = back;
        }
    
    
    
    
    /** * 军队 * 具体执行攻打任务 * @author Administrator * */
    public class Army { 
        private Soldier soldier;
    
        public Army(Soldier soldier) {
            super();
            this.soldier = soldier;
        }
    
        public void attack()
        {
            soldier.setAttach("攻击 齐国");
            System.out.println("攻击 齐国");
    
        }
    
        public void back()
        {
            soldier.setBack("前方大事不妙，赶紧撤退");
            System.out.println("前方大事不妙，赶紧撤退");
        }
        public void undo()
        {
            soldier.setBack("原路撤退");
            System.out.println("原路撤退");
        }
    
    }
    
    
    
    
    /** * 命令 圣旨 * @author Administrator * */
    public interface Command { 
    
        void excute();
    
        void back();
    
    }
    
    
    //真实命令
    public class AttachCommand implements Command { 
        private Army army;
    
        public AttachCommand(Army army) {
            this.army = army;
        }
    
        @Override
        public void excute() {
            army.attack();
        }
    
        @Override
        public void back() {
            army.back();
        }
    
    }
    
    
    
    //真实命令
    public class UndoCommand implements Command { 
        private Army army;
    
    
        public UndoCommand(Army army) {
            this.army = army;
        }
    
        @Override
        public void excute() {
            army.undo();
        }
    
        @Override
        public void back() {
            army.back();
        }
    
    }
    
    
    
    
    /** * 将军 * @author Administrator * */
    public class General { 
        private Command undoCommand;
        private Command attackCommand;
    
    
        public General()
        {
            //构建士兵
            Soldier soldier=new Soldier();
            //建立军队
            Army army=new Army(soldier);
            undoCommand=new UndoCommand(army);
            attackCommand =new AttachCommand(army);
        }
        /** * 皇帝调用大臣攻击方法 */
        public void attach()
        {
            attackCommand.excute();
        }
        public  void  undo()
        {
            undoCommand.back();
        }
    
    }
    
    
    //皇帝
    public class Emperor { 
        public static void main(String[] args) {
            General general=new General();
            general.attach();
            general.undo();
            /** * 不仅仅做隔离 */
             }
    }

[SouthEast]: /images/20220606/81ee9f6794bf42318f3d2b4daf1eae56.png