我必须在我的应用程序（spring）中使用两个不同的数据库和 Hibernate、Jpa。
我想直接为不同的数据源定义不同的表。
所以我使用两个不同的持久性单元并尝试使用
<property name="packagesToScan" value="it.two.app.domain.first" />
and
<property name="packagesToScan" value="it.two.app.domain.second" />
将不同的表放入不同的包中。
但它不起作用。
事实上，所有表都带有第一个数据源。
然后我尝试将类的名称写入持久性 XML 文件
喜欢
<persistence-unit name="persistenceFirst" transaction-type="RESOURCE_LOCAL">
<class>it.two.app.domain.first.OneTable</class>
<exclude-unlisted-classes/>
</persistence-unit>
和
it.two.app.domain.second.OtherTable
但是当我运行日志时说
表“firstDB.other-table”不存在
我在服务文件中使用
@PersistenceContext(unitName ="persistenceFirst")
private EntityManager em;
and
@PersistenceContext(unitName = "persistenceSecond")
EntityManager em;
你有一些想法吗？
这是数据源 XML 文件
<?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:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<!-- first datasource -->
<context:property-placeholder location="classpath:jdbc-first.properties"/>
<bean id="dataSourceFirst" class="org.apache.commons.dbcp.BasicDataSource"
p:driverClassName="${jdbc.driverClassName}" p:url="${jdbc.databaseurl}"
p:username="${jdbc.username}" p:password="${jdbc.password}" />
<!-- second datasource -->
<context:property-placeholder location="classpath:jdbc-second.properties"/>
<bean id="dataSourceSecond" class="org.apache.commons.dbcp.BasicDataSource"
p:driverClassName="${jdbc.driverClassName}" p:url="${jdbc.databaseurl}"
p:username="${jdbc.username}" p:password="${jdbc.password}" />
<bean id="transactionManagerFirst" class="org.springframework.orm.jpa.JpaTransactionManager"
p:entityManagerFactory-ref="emfFirst"/>
<bean id="transactionManagerSecond" class="org.springframework.orm.jpa.JpaTransactionManager"
p:entityManagerFactory-ref="emfSecond"/>
<tx:annotation-driven transaction-manager="transactionManagerFirst"/>
<tx:annotation-driven transaction-manager="transactionManagerSecond"/>
<jpa:repositories base-package="it.two.app.repository.first"
entity-manager-factory-ref="emfFirst" transaction-manager-ref="transactionManagerFirst" />
<jpa:repositories base-package="it.two.app.repository.second"
entity-manager-factory-ref="emfSecond" transaction-manager-ref="transactionManagerSecond" />
<bean id="emfFirst"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="persistenceFirst"/>
<property name="persistenceXmlLocation" value="classpath:/META-INF/persistence-first.xml"/>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="dataSource" ref="dataSourceFirst" />
<property name="packagesToScan" value="it.two.app.domain.first" />
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.max_fetch_depth">3</prop>
<prop key="hibernate.jdbc.fetch_size">50</prop>
<prop key="hibernate.jdbc.batch_size">10</prop>
</props>
</property>
</bean>
<bean id="emfSecond" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="persistenceSecond"/>
<property name="persistenceXmlLocation" value="classpath:/META-INF/persistence- second.xml"/>
<property name="jpaVendorAdapter" >
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
</property>
<property name="dataSource" ref="dataSourceSecond"/>
<property name="packagesToScan" value="it.two.app.domain.second"/>
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.max_fetch_depth">3</prop>
<prop key="hibernate.jdbc.fetch_size">50</prop>
<prop key="hibernate.jdbc.batch_size">10</prop>
</props>
</property>
</bean>
</beans>
解决方案！！！！！！
我明白这个问题。
简单地
<!-- first datasource -->
<bean id="dataSourceFirst" class="org.apache.commons.dbcp.BasicDataSource"
p:driverClassName="com.mysql.jdbc.Driver" p:url="url...."
p:username="username" p:password="password" />
<!-- second datasource -->
<bean id="dataSourceSecond" class="org.apache.commons.dbcp.BasicDataSource"
p:driverClassName="com.mysql.jdbc.Driver" p:url="url2...."
p:username="username2" p:password="password2" />
