The dependencies
that need to be introduced are spring, mybatis, mybatis-spring (integrated jar package), mysql-related jar package, druid (it needs to create sqlsessionfactory, so the data source object is used), lombook, log4j (to display logs)
Transaction understanding: https://blog.csdn.net/jiangyu1013/article/details/84397366?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.edu_weight&depth_1-utm_source=distribute.pc_relevant.none-task- blog-BlogCommendFromMachineLearnPai2-2.edu_weight
