package com.example.demo.circulator.service; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import javax.annotation.PostConstruct; @Service public abstract class CirService { @PostConstruct public void init(){} @Transactional //数据库与事物的一致性 public double NextCirculator(long checkNum){return 0;} public double SumCirculator(long productNum,double amount,int year){return 0;} }