北京火龙果软件工程技术中心OutlineInroductionPatternMapLiskovSusbstitutionPrincipleDependencyInversionPrincipleStructuralPatternsBridgeOpen/ClosedPrincipleCompositeCreationalPatternsSingletonMazeAbstractFactoryBuilderFactoryBehavioralPatternsVisitorReviewBibliogra