本书设计实例从面向对象的设计中精选出23个设计模式，总结了面向对象设计中最有价值的经验，并且用简洁可复用的形式表达出来。本书分类描述了一组设计良好，表达清楚的软件设计模式，这些模式在实用环境下有特别有用。-Examples of book design from the design of object-oriented selection of 23 design patterns, object-oriented design sums up the most valuable experience and a concise form of reusable expressed. Classification of this book describes the design of a group of good, clear expression of the software design patterns, these models are in the practical environment particularly useful.