责任链模式

public class YuanGong {
    String name;

    int days;

    public YuanGong(String name, int days) {
        this.name = name;
        this.days = days;
    }

    public int getDays() {
        return days;
    }

    public void qinJia() {
        System.out.println(name + "被批准请假" + days + "天");
    }
}

public abstract class Leader {
    YuanGong yuanGong;

    Leader leader;

    public Leader(YuanGong yuanGong, Leader leader) {
        this.yuanGong = yuanGong;
        this.leader = leader;
    }

    abstract void approve();
}

public class ZhuZhang extends Leader {

    public ZhuZhang(YuanGong yuanGong, Leader higherleader) {
        super(yuanGong, higherleader);
    }

    @Override
    public void approve() {
        if (yuanGong.days <= 3) {
            yuanGong.qinJia();
            System.out.println("组长批准的");
        } else {
            leader.approve();
        }
    }
}

public class JingLi extends Leader {

    public JingLi(YuanGong yuanGong, Leader higherleader) {
        super(yuanGong, higherleader);
    }

    @Override
    public void approve() {
        if (yuanGong.days <= 5) {
            yuanGong.qinJia();
            System.out.println("经理批准的");
        } else {
            leader.approve();
        }
    }
}

public class LaoBan extends Leader {

    public LaoBan(YuanGong yuanGong, Leader higherleader) {
        super(yuanGong, higherleader);
    }

    @Override
    public void approve() {
        yuanGong.qinJia();
        System.out.println("老板批准的");
    }
}

测试

public class Test {
    public static void main(String[] args) {
        YuanGong yuanGong1 = new YuanGong("张雨婷", 3);
        ZhuZhang zhuZhang = new ZhuZhang(yuanGong1, new JingLi(yuanGong1, new LaoBan(yuanGong1, null)));
        zhuZhang.approve();
        YuanGong yuanGong2 = new YuanGong("张雨婷", 8);
        ZhuZhang zhuZhang2 = new ZhuZhang(yuanGong2, new JingLi(yuanGong2, new LaoBan(yuanGong2, null)));
        zhuZhang2.approve();
    }
}