[单例模式](%E5%8D%95%E4%BE%8B%E6%A8%A1%E5%BC%8F.md) [工厂模式](%E5%B7%A5%E5%8E%82%E6%A8%A1%E5%BC%8F.md) [代理模式](%E4%BB%A3%E7%90%86%E6%A8%A1%E5%BC%8F%E6%96%B9%E5%BC%8F%E5%9C%B0%E6%96%B9.md) [建造者模式](%E5%BB%BA%E9%80%A0%E8%80%85%E6%A8%A1%E5%BC%8F.md)