java - Where should I put @Transactional annotation: at an interface definition or at an implementing class? - Stack Overflow

https://*.com/questions/3120143/where-should-i-put-transactional-annotation-at-an-interface-definition-or-at-a

第9章事务管理
https://docs.spring.io/spring/docs/2.0.x/reference/transaction.html

java - Where to put @Transactional? In interface specification or implementation? - Stack Overflow
https://*.com/questions/5551541/where-to-put-transactional-in-interface-specification-or-implementation

10.交易管理
https://docs.spring.io/spring/docs/3.0.x/spring-framework-reference/html/transaction.html

关于@transactional使用在接口上的问题-CSDN论坛
https://bbs.csdn.net/topics/392176928

Spring Boot入门教程(四十五): 事务@Transactional - vbirdbest的博客 - CSDN博客
https://blog.csdn.net/vbirdbest/article/details/82313903