项目源码已提交github：https://github.com/ckl001/designPattem_java

package com.Ljava.design.pattem.creational.simpleFactory;

/**
 * @Auther 20173
 * @Date 2019-4-8 14:53
 * @Des 视频（抽象）
 **/
public abstract class Video {

    public abstract void produce();
}

package com.Ljava.design.pattem.creational.simpleFactory;

/**
 * @Auther 20173
 * @Date 2019-4-8 14:53
 * @Des java视频
 **/
public class JavaVideo extends Video {

    @Override
    public void produce() {
        System.out.println("生产java视频");
    }
}

package com.Ljava.design.pattem.creational.simpleFactory;

/**
 * @Auther 20173
 * @Date 2019-4-8 14:57
 * @Des py视频
 **/
public class PythonVideo extends Video {
    @Override
    public void produce() {
        System.out.println("生产python视频");
    }
}

package com.Ljava.design.pattem.creational.simpleFactory;

/**
 * @Auther 20173
 * @Date 2019-4-8 14:58
 * @Des 视频工厂类
 **/
public class VideoFactory {

    public Video getVideo(Class c){
        Video video = null;
        try{
            //通过反射拿到instance
            video = (Video) Class.forName(c.getName()).newInstance();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        return video;
    }
}

package com.Ljava.design.pattem.creational.simpleFactory;

/**
 * @Auther 20173
 * @Date 2019-4-8 15:06
 * @Des TODO
 **/
public class Test {

    public static void main(String[] args) {
        VideoFactory videoFactory = new VideoFactory();
        Video video = videoFactory.getVideo(JavaVideo.class);
        if(video == null){
            return;
        }
        video.produce();
    }
}