[单例模式](%E5%8D%95%E4%BE%8B%E6%A8%A1%E5%BC%8F.md) [发布订阅模式(观察者模式)](%E5%8F%91%E5%B8%83%E8%AE%A2%E9%98%85%E6%A8%A1%E5%BC%8F%E8%A7%82%E5%AF%9F%E8%80%85%E6%A8%A1%E5%BC%8F.md) [工厂模式](%E5%B7%A5%E5%8E%82%E6%A8%A1%E5%BC%8F.md) [命名空间模式](%E5%91%BD%E5%90%8D%E7%A9%BA%E9%97%B4%E6%A8%A1%E5%BC%8F.md)