说明：  为能和大家能共同探讨"设计模式",我将自己在学习中的心得写下来,只是想帮助更多人更容易理解GoF的《设计模式》。由于原著都是以C++为例, 以Java为例的设计模式基本又都以图形应用为例,而我们更关心Java在中间件等服务器方面的应用,因此,本站所有实例都是非图形应用,并且顺带剖析Jive论坛系统.同时为降低理解难度，尽量避免使用UML图.
(In order to explore and we can design mode , I will own experience in learning to write it down, but want to help more people more easily understand the GOF of the design model. As a result of the original are C++ As an example to the design of Java as an example the basic mode to graphics applications both as an example, and we are more concerned with the middleware such as Java application server, so all instances of this site are non- graphics applications, and analyze the Jive forum passing system. At the same time in order to reduce the difficulty of understanding, as far as possible avoid the use of UML diagram.)