@Transactional manages transactions

Using Spring configuration based on @Transactional

<beans:bean id="transactionManager"  class="org.springframework.orm.jpa.JpaTransactionManager">  
    <beans:property name="dataSource" ref="dataSource" />  
    <beans:property name="entityManagerFactory" ref="entityManagerFactory" />  
</beans:bean>  
  
<!-- 声明使用注解式事务 -->  
<tx:annotation-driven transaction-manager="transactionManager" />  

Use @Transactional directly on a class or method that requires transactions to mark the class or method using transactions to manage database operations