【摘要】 简单介绍了设计模式的概念和ErichGamma归纳的一些基本的面向对象软件设计模式.根据Email系统的特点,将这些模式应用到系统的整体设计中,使得系统结构清晰协调,保证了系统的稳定性和可扩充性.更多还原

【Abstract】 The concept of design patterns is simply introduced and some basic object-or iented software design patterns summarized by Erich Gamma are described. Accordi ng to the characteristics of an Email system, the design patterns mentioned abov e are applied to its total design. This design method not only contributes to the clarity and harmony of the system frame, but also benefits the stability an d scalability of the system. 更多还原