How to set some Hibernate properties in Spring JPA

问题:

I am trying to get rid of the typical persistence.xml file in Spring JPA web application. So far, I have managed to inject the EntityManager successfully with the following:

@Configuration
@EnableTransactionManagement
public class JpaConfig {

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(){

        LocalContainerEntityManagerFactoryBean factoryBean
            = new LocalContainerEntityManagerFactoryBean();

        factoryBean.setDataSource( this.restDataSource() );
        factoryBean.setPackagesToScan( new String[ ] { "com.jverstry" } );
        factoryBean.setPersistenceUnitName("MyMy");

        JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter(){
         {
            // JPA properties ...
         }
        };

        factoryBean.setJpaVendorAdapter( vendorAdapter );

        return factoryBean;

    }

    @Bean
    public DataSource restDataSource(){

        DriverManagerDataSource dataSource = new DriverManagerDataSource();

        dataSource.setDriverClassName("org.hsqldb.jdbcDriver");
        dataSource.setUrl("jdbc:hsqldb:mem:testdb");
        dataSource.setUsername("sa");
        dataSource.setPassword("");

        return dataSource;

    }

    @Bean
    public PlatformTransactionManager transactionManager(){

        JpaTransactionManager transactionManager = new JpaTransactionManager();

        transactionManager.setEntityManagerFactory(
            this.entityManagerFactoryBean().getObject() );

        return transactionManager;

    }

}

I have managed to move the properties of my persistence.xml for the datasource:

<properties>
    ... 
    <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect"/>
    <property name="hibernate.hbm2ddl.auto" value="create"/>
</properties>

but how to I set the two remaining hibernate properties above? Thanks

回答1:

Spring provides a way to configure these options in provider-independent way using AbstractJpaVendorAdapter (setDatabase() and setGenerateDdl(), though setGenerateDdl() doesn't take DDL mode).

Alternatively, you can pass arbitrary properties to LocalContainerEntityManagerFactory using setJpaProperties() (or setJpaPropertyMap()):

Properties props = new Properties();
props.put("hibernate.dialect", "org.hibernate.dialect.HSQLDialect");
props.put("hibernate.hbm2ddl.auto", "create");
factoryBean.setJpaProperties(props);

回答2:

This is the old question but might help someone who is using XML for configuration.

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="persistenceUnitName" value="test-jpa"/>
    <property name="dataSource" ref="dataSourceProxy"/>
    <property name="jpaDialect">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
    </property>

    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
            <property name="showSql" value="true"/>
            <property name="generateDdl" value="false"/>
            <property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect"/>
            <property name="database" value="MYSQL"/>
        </bean>
    </property>
    <property name="jpaPropertyMap">
        <map>
            <entry key="hibernate.jdbc.batch_size" value="10"/>
            <entry key="hibernate.jdbc.fetch_size" value="10"/>
            <entry key="hibernate.order_inserts" value="true"/>
            <entry key="hibernate.order_updates" value="true"/>
            <entry key="hibernate.jdbc.batch_versioned_data" value="true"/>
            <entry key="hibernate.format_sql" value="true"/>
        </map>
    </property>
</bean>