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。-Book design examples from a selection of 23 design patterns in object-oriented design, summarizes

For the most valuable experience in object design, and simple reusable form of expression

To. Book classification describes a group of design to express a clear software design patterns, these

Mode is particularly useful in a practical environment.