@transactional 服务在 spring 中应该是单例还是原型？

Question

Will transaction management be a problem in spring if the service layer class is singleton? Or should it be prototype?

Answer 1

No that should not be a problem. What the @Transactional annotation will do is bind the Transaction lifecyle to the current thread. So each new thread will be run in a separate transaction.

So when your method is invoked, Spring will wrap that method call into a Transaction, so in a single threaded context, a transaction will start and commit if the invocation is successful, and rollback (depending on your config) if an exception is thrown.

In a multithreaded context, each Thread will run in a separate transaction.