The MyBatis data mapper framework makes it easier to use a relational database with object-oriented applications.
MyBatis couples objects with stored procedures or SQL statements using a XML descriptor or annotations.
Simplicity is the biggest advantage of the MyBatis data mapper over object relational mapping tools.

See the docs in: http://mybatis.github.io/mybatis-3
Download it from: https://github.com/mybatis/mybatis-3/releases

里面包含了我阅读源码时的备注

hhw:task 任务集合
1.当事务设置为自动提交时，自动提交的代码在什么地方？
2.当事务交给外部管理的时候，是怎么实现的？