设计模式（Design pattern）是一套被反复使用、多数人知晓的、经过分类编目的、代码设计经验的总结。使用设计模式是为了可重用代码、让代码更容易被他人理解、保证代码可靠性。 毫无疑问，设计模式于己于他人于系统都是多赢的，设计模式使代码编制真正工程化，设计模式是软件工程的基石，如同大厦的一块块砖石一样。

-Design patterns (Design pattern) is a set of repeated use, most people know, after cataloging, a summary of the code design experience. The use of design patterns for reusable code, the code easier to be understood to ensure code reliability. There is no doubt that design patterns have been others in the system is a win-win design patterns to make the code preparation of real engineering design model is the cornerstone of software engineering, like building a brick stone.