我可以在spring應用程序上下文中從jpa獲取jdbc數據源嗎？

Question

如你所知，在Spring中的ApplicationContext，我們可以定義從persistence.xml中的entityManagerFactory豆就像：

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
    <property name="persistenceUnitName" value="MyUnit" /> 
    <property name="jpaVendorAdapter"> 
     <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
      <property name="showSql" value="true" /> 
      <property name="generateDdl" value="false" /> 
      <property name="database" value="MYSQL" /> 
     </bean> 
    </property> 
</bean> 

現在

如果我想初始化數據庫如下：

<jdbc:initialize-database data-source="myDataSource" enabled="true"> 
    <jdbc:script location="classpath*:com/myapp/data*.sql"/> 
</jdbc:initialize-database> 

應該我必須配置其他數據源bean爲它？或者我可以參考上面定義的emf，或者可以參考persistence.xml？

Answer 1

<!-- use jndi lookup, or define it by your selfe --> 
<jee:jndi-lookup id="dataSource" jndi-name="java:comp/env/jdbc/myDataSource" /> 

<bean 
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" 
    id="entityManagerFactory"> 
    <property name="persistenceUnitName" value="persistenceUnit" /> 
    <property name="dataSource" ref="dataSource" /> 

    <!-- this is important to connect JPA and JdbcTemplate transaction control --> 
    <property name="jpaVendorAdapter"> 
     <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
      <property name="showSql" value="false" /> 
     </bean> 
    </property> 
</bean> 

<!-- jdbc templates that are equals for all databases --> 
<bean class="org.springframework.jdbc.core.JdbcTemplate" id="jdbcTemplate"> 
    <constructor-arg ref="dataSource" /> 
</bean> 
<bean class="org.springframework.jdbc.core.simple.SimpleJdbcTemplate" id="simpleJdbcTemplate"> 
    <constructor-arg ref="dataSource" /> 
</bean>