工厂模式（依赖反射）

工厂方法：

public class HumanFactory2 {
    public static Human getHuman(String className) throws ClassNotFoundException, IllegalAccessException, InstantiationException {
        Class clazz = Class.forName(className);
        return (Human)clazz.newInstance();
    }
}

human和实现类

public interface Human {
    void say();
}

public class WhilteHuman implements Human {
    @Override
    public void say () {
        System.out.println(“我是白种人”);
    }
}

public class YellowFactory implements Human {
    @Override
    public void say() {
        System.out.println(”我是黄种人”);
    }
}

测试类：

public class TestSimpleFactory {
    public static void main(String[] args) throws IllegalAccessException, InstantiationException, ClassNotFoundException {
        Human human = HumanFactory2.getHuman("simpleFactory.human.WhiteHuman");
        human.say();
    }
}