Liferay如何连接其它数据库
http://www.liferay.com/web/guest/community/wiki/-/wiki/Main/Extending+Liferay+Tables+in+Another+Database
http://www.liferay.com/web/guest/community/wiki/-/wiki/Main/Connecting+to+Separate+Database+Using+Build-service+in+Plugins+SDK
