MyBatis Generator 自动化生成代码工具

 mybatis 自动化代码工具，文档介绍： http://www.mybatis.org/generator/generatedobjects/exampleClassUsage.html

 mysql 在分组内按照时间倒序显示数据 http://www.zhimengzhe.com/shujuku/other/255252.html

  

SELECT BBS_id,reply_time FROM (SELECT * FROM app_bbs_reply WHERE parent_id='-1' ORDER BY reply_time DESC) AS A WHERE 1=1 GROUP BY BBS_id ORDER BY reply_time DESC