挑選了一些討論三層架構的貼子。希望能給網友們一些啓發:
http://community.csdn.net/Expert/topic/5397/5397049.xml?temp=.2310602
http://community.csdn.net/Expert/topic/5337/5337705.xml?temp=.4920313
http://community.csdn.net/Expert/topic/5504/5504328.xml?temp=.3758814
http://community.csdn.net/Expert/topic/5487/5487711.xml?temp=.5016901