参见：https://www.cnblogs.com/aibabel/p/6910714.html
https://blog.csdn.net/u010689440/article/details/108240974
https://blog.csdn.net/weixin_44588495/article/details/92234247
https://blog.csdn.net/ZYC88888/article/details/83856416 mysql设置sql语句显示
https://blog.csdn.net/j7636579/article/details/73647885/?utm_term=mybatis%E7%9A%84%E4%B8%80%E7%BA%A7%E7%BC%93%E5%AD%98%E5%A6%82%E4%BD%95%E5%85%B3%E9%97%AD&utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2~all~sobaiduweb~default-2-73647885&spm=3001.4430 mybatis关闭一级缓存
https://blog.csdn.net/u010660575/article/details/80654879 测试事务隔离级别的时候出现问题