工厂方法模式【FACTORY METHOD PATTERN】
public class Main { public static void main(String[] args) { Factory factory = new IDCardFactory(); Product card1 = factory.create("1"); Product card2 = factory.create("2"); Product card3 = factory.create("3"); System.out.println("card:"+factory.getOwners()); card1.use(); card2.use(); card3.use(); } }