详细的介绍了MyBatis技术，并辅以几个小项目(With the advent of the big data age, the Java persistence layer framework MyBatis has become a choice for more and more enterprises. Unfortunately, at present, there is still no book about MyBatis in China, which increases the difficulty of beginners. Beginners often learn MyBatis based on sporadic cases, unable to systematically grasp MyBatis, let alone proficient. The principles and practices of MyBatis are written by the author after lots of practice and Research on source code, which is the introduction of MyBatis system in China.)