当你自定义一个删除的delete方法时，不加事务注解，报错

报错：cannot reliably process 'remove' call

要用的注解：

    @Modifying
    @Transactional
int deleteUserByUserName(String username);

 

参考：

jpa 报错:No EntityManager with actual transaction available for current thread - cannot reliably proce_Wu_______的博客-CSDN博客_cannot reliably process 'remove' call