多连接 + JPA + Spring答案

【问题标题】：Multiple Connections + JPA + Spring多连接 + JPA + Spring
【发布时间】：2015-01-15 18:21:31
【问题描述】：

我有 2 个 DataSource 连接，我正在指定每个连接应该使用哪个类，但我仍然遇到一些异常：

这是我的 applicationContext.xml

    <context:component-scan base-package="com.example.video"/> 
    <context:annotation-config/>
    <tx:annotation-driven />  
    <jee:jndi-lookup id="VOD" jndi-name="java:comp/env/jdbc/VOD" />
    <jee:jndi-lookup id="SB" jndi-name="java:comp/env/jdbc/SB" />



     <bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="VOD" />
        <property name="packagesToScan" value="com.example.video" />
        <property name="persistenceProviderClass" value="org.hibernate.ejb.HibernatePersistence" />
        <property name="jpaProperties">
                <props>
                        <prop key="hibernate.hbm2ddl.auto">validate</prop>
                </props>
        </property>
    </bean>

    <bean id="transactionManager" 
        class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    </bean> 


     <bean id="entityManagerFactorySB"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="SB" />
        <property name="packagesToScan" value="com.example.service" />
        <property name="persistenceProviderClass" value="org.hibernate.ejb.HibernatePersistence" />
        <property name="jpaProperties">
                <props>
                        <prop key="hibernate.hbm2ddl.auto">validate</prop>
                </props>
        </property>
    </bean>

    <bean id="transactionManagerSB" 
       class="org.springframework.orm.jpa.JpaTransactionManager">
            <property name="entityManagerFactory" ref="entityManagerFactorySB"/>
    </bean> 

    <jpa:repositories base-package="com.example.video"
                        entity-manager-factory-ref="entityManagerFactory" 
                        transaction-manager-ref="transactionManager"/>

    <jpa:repositories base-package="com.example.service"
                      entity-manager-factory-ref="entityManagerFactorySB" 
transaction-manager-ref="transactionManagerSB"/>

这是我的 persistence.xml

  <persistence-unit name="VOD" transaction-type="RESOURCE_LOCAL">

       <provider>org.hibernate.ejb.HibernatePersistence</provider>
       <class>com.example.video.model.Product</class>
                             .
                             .
       <class>com.example.video.model.Task</class>
       <exclude-unlisted-classes>true</exclude-unlisted-classes> 

       <properties>

            <property name="hibernate.dialect"  value="org.hibernate.dialect.Oracle10gDialect" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.format_sql" value="true" />
            <property name="hibernate.transaction.factory_class" value="org.hibernate.transaction.JDBCTransactionFactory" /> 
            <property name="hibernate.hbm2ddl.auto" value="update" />
       </properties>

    </persistence-unit>
   <persistence-unit name="SB" transaction-type="RESOURCE_LOCAL">

       <provider>org.hibernate.ejb.HibernatePersistence</provider>
       <class>com.example.service.model.ChargingInfo</class>
       <exclude-unlisted-classes>true</exclude-unlisted-classes>

    </persistence-unit>
</persistence>

这是个例外：引起：org.hibernate.HibernateException：缺少表：CHARGINGINFO

【问题讨论】：

你的数据库中有CHARGINGINFO表吗？
是的，数据库没问题。

标签： java spring hibernate spring-mvc jpa

【解决方案1】：

你检查过 MergingPersistenceUnitManager http://docs.spring.io/spring-data/jpa/docs/current/reference/html/#jpa.misc.merging-persistence-units 允许您将多个持久性提供程序合并为一个。

【讨论】：

【解决方案2】：

发现问题，只需要从 applicationContext.xml 中删除该行

验证

从 bean 声明然后它工作正常。

【讨论】：