HeadFirstDesignPattern中文版本1WelcometoDesignPatterns:anintroduction12KeepingyourObjectsintheknow:theObserverPattern373DecoratingObjects:theDecoratorPattern794BakingwithOOgoodness:theFactoryPattern1095OneofaKindObjects:theSingletonPattern1696EncapsulatingInvocation:theCommandPatter