This is a one-to-many JpaTemplate example using Hibernate that can to find, save, and update a record. There is a Person that
has a one-to-many relationship to Address. This example is very similar
to One to Many Hibernate Annotation Configuration example
since that example was already using javax.persistence annotations to configure the Person and Address beans.
Using JpaTemplate can make an easier upgrade path to JPA from an application already using Spring's HibernateTemplate.
![[Note]](images/note.gif) | Note |
|---|---|
This example has the DAO class extend |
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| -- Spring 2.5.x JPA Documentation | ||
The Person DAO is configured using context:component-scan. Then tx:annotation-driven will configure transactions
on any beans with @Transactional, and just after it the JPA transaction manager is setup.
The HsqldbInitializingDriverManagerDataSource is used to initialize the test HSQLDB database.
The LocalContainerEntityManagerFactoryBean is configured with the DataSource and for use with Hibernate as the JPA adapter.
It also sets the persistenceUnitName attribute to specify which persistence unit to use for this entity manager
(multiple examples use this persistence.xml).
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:component-scan base-package="org.springbyexample.orm.jpa.template.dao" />
<tx:annotation-driven />
<bean id="transactionManager"
class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="dataSource" ref="dataSource" />
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<bean id="dataSource"
class="org.springbyexample.jdbc.datasource.HsqldbInitializingDriverManagerDataSource">
<property name="sqlScriptProcessor">
<bean class="org.springbyexample.jdbc.core.SqlScriptProcessor">
<property name="charset" value="UTF-8" />
<property name="sqlScripts">
<list>
<value>classpath:/schema.sql</value>
</list>
</property>
</bean>
</property>
</bean>
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="persistenceUnitName" value="simple-jpa-template" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="showSql" value="true" />
<property name="generateDdl" value="true" />
<property name="database" value="HSQL" />
</bean>
</property>
</bean>
</beans>