博主转载的几篇文章都不错。
我下来会好好组织实施。
系统架构：
<a target="_blank" href="http://blog.csdn.net/dinglang_2009/article/details/6863697">http://blog.csdn.net/dinglang_2009/article/details/6863697</a>
http://blog.csdn.net/dinglang_2009/article/details/6863707
http://blog.csdn.net/dinglang_2009/article/details/6863697
http://blog.csdn.net/dinglang_2009/article/details/6863701