说明：  《设计模式》中文电子书，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。
(" Design Patterns" Chinese e-books, book design examples from object-oriented design in the selection of 23 design patterns, object-oriented design sums up the most valuable experience, and expressed with a simple reusable form. The book describes the classification of a set of design, software design patterns to express clearly, these modes are particularly useful in practical environments.)