Spring数据jpa在普通的java应用程序中提交？

Question

When using spring and spring data jpa in a normal java application how will jpa know when to commit the data to the database?

I ask this because repository.save() doesn't commit.

Should i manually commit or can spring handle this for me?

My application context xml:

 <context:component-scan base-package="...">
    </context:component-scan>

<jpa:repositories base-package="..." entity-manager-factory-ref="emf"  />



<bean id="emf" class="...spring.MyEMF"></bean>

<!-- Add Transaction support -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="emf" />
</bean>

<!-- Use @Transaction annotations for managing transactions -->
<tx:annotation-driven transaction-manager="transactionManager" />

I manually init my context with:

new ClassPathXmlApplicationContext("classpath:/data.xml")

Answer 1

No spring can handle transaction for you just before your method repository.save() add @Transactional

@Transactional
public void save(){
   //do something
}

and in your configuration class make sure that spring transaction handling is enabled

@EnableTransactionManagement
class myConfig{

}