思路来自： 明确网站定位，增加学习日记目标分组功能
向开源社区提交了issue 21:
http://learndiary.tigris.org/issues/show_bug.cgi?id=21
The all different goals can be organized by group, in this way, user can get the
outline of a website which running LearnDiary.
Add some Top 10 statistical data of website, such as top 10 newly created
diaries, top 10 most posting diaries' user, etc..
今天完成了相关数据库表建立，一个bean模型，和bean模型的数据库存取类。延续原来的入门级设计方法，快速实现需要的功能。
还是以前的思路，软件应用为先。