One to Many JPA Hibernate Configuration

David Winterfeldt

2008

This is a one-to-many JPA configuration 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.

	Note
	This example has the DAO class extend JpaDaoSupport and uses the JpaTemplate, but Spring recommends the native JPA style of coding.

	`JpaTemplate` mainly exists as a sibling of `JdoTemplate` and `HibernateTemplate`, offering the same style for people used to it. or newly started projects, consider adopting the native JPA style of coding data access objects instead, based on a "shared EntityManager" reference obtained through the JPA `@PersistenceContext` annotation.
	-- Spring 2.5.x JPA Documentation

1. Spring Configuration

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.

PersonDaoTest-context.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.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="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>

Prev	Up	Next
5. Reference	Home	2. JPA Entity Configuration