职责链模式

public abstract class Manger {
        protected Manger superior;  //上级
        protected String postion;   //职位
        public Manger(String position) {    //构造方法设置
            this.postion=position;         //你的职位
        }
        public void setsuperior(Manger superior) {
            this.superior=superior;
        }                      //设置上级
        public abstract void dealrequdst(String request) ;
}

public class Leverone extends Manger {
    public Leverone(String string) {     //构造方法设置职位
        super(string);
    }
    
    public void dealrequdst(String request) {
        if (request.equals("加薪100")) {
            System.out.println(postion+": "+"请求通过");
        }
        else if (superior!=null) {
            superior.dealrequdst(request);
        }
    }
}

public class Levertwo extends Manger {
    public Levertwo(String string) {
        super(string);
    }
    
    public void dealrequdst(String request) {
        if (request.equals("加薪200")) {
            System.out.println(postion+": "+"请求通过");
        }
        else if (superior!=null) {
            superior.dealrequdst(request);
        }
    }
}

public class Leverthree extends Manger {
    public Leverthree(String string) {
        super(string);
    }
    
    public void dealrequdst(String request) {
        if (request.equals("加薪300")) {
            System.out.println(postion+": "+"请求通过");
        }
        else {
            System.out.println(postion+": "+"不可以");
        }
    }
}

public class Client {
    public static void main(String[] args) {
        Leverone leverone=new Leverone("主管");
        Levertwo levertwo=new Levertwo("经理");
        Leverthree leverthree=new Leverthree("总经理");
        
        leverone.setsuperior(levertwo);
        levertwo.setsuperior(leverthree);
        leverone.dealrequdst("加薪200");
    }
}