SSM 框架实战教程 事务传播行为 75-77一、参考资料【尚硅谷最新版SSM教程基于AI的全新ssm框架实战】 https://www.bilibili.com/video/BV14WtLeDEit/?p75share_sourcecopy_webvd_source855891859b2dc554eace9de3f28b4528二、笔记总结75、READ_UNCOMMITED 读未提交76、READ_COMMITED 读已提交77、REPEATABLE_REDA 可重复读