Question

我需要在我的项目中使用hibernate连接多个数据库。我尝试使用2个数据源bean标签，但它不工作它会引发错误。但是，如果我给1个数据源bean，它工作正常。在这里，我展示了我的属性文件和servlet.xml文件。

database.properties：

'homeUrl' => '/yii2advance',

'components' => [
'request' => [
        'baseUrl' => '/yii2advance', // localhost/yii2advance
    ],
    'urlManager' => [
         'enablePrettyUrl' => true,
         'showScriptName' => false,
         'rules' => [
            '<controller:\w+>/<id:\d+>' => '<controller>/view',
            '<controller:\w+>/<action:\w+>/<id:\d+>' => '<controller>/<action>',
            '<controller:\w+>/<action:\w+>' => '<controller>/<action>',
            ],
],

弹簧servlet.xml中：

#mySQL DB Properties
database.driver=com.mysql.jdbc.Driver
database.url=jdbc:mysql://localhost:3306/abc
database.user=root
database.password=pass
hibernate.dialect=org.hibernate.dialect.MySQLDialect
hibernate.show_sql=true
hibernate.hbm2ddl.auto=update


#DB2DB Properties
db2.driver=com.ibm.db2.jcc.DB2Driver
db2.url=jdbc:db2://123.141.74.323:50000/DB
db2.user=user
db2.password=pass
db2hibernate.dialect=org.hibernate.dialect.DB2Dialect
db2hibernate.show_sql=true
db2hibernate.hbm2ddl.auto=update

如果我评论第二个数据源bean意味着它工作正常，但我没有注释第二个数据源bean意味着它会抛出错误。下面我显示错误。

错误：

<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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

<!--Properties file  -->
<context:property-placeholder location="classpath:resources/database.properties" />

<!--Packages to scan  -->
<context:component-scan base-package="com.gcs.*" />

<tx:annotation-driven transaction-manager="hibernateTransactionManager"/>

<tx:annotation-driven transaction-manager="hibernateTransactionManager1"/>

<!--View Resolver  -->

    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass">
            <value>
                org.springframework.web.servlet.view.tiles2.TilesView
            </value>
        </property>
    </bean>
    <bean id="tilesConfigurer"
        class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
        <property name="definitions">
            <list>
                <value>/WEB-INF/tiles.xml</value>
            </list>
        </property>
    </bean>
<!--End of View Resolver  -->

<!-- mySQL DataSource -->

    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${database.driver}" />
        <property name="url" value="${database.url}" />
        <property name="username" value="${database.user}" />
        <property name="password" value="${database.password}" />
    </bean>

    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="annotatedClasses">
            <list>
                <value>com.gcs.beans.SystemBean</value>
                <value>com.gcs.beans.TemplateBean</value>
                <value>com.gcs.beans.LoginBean</value>
                <value>com.gcs.beans.TestSuitBean</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${hibernate.dialect}</prop>
                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>             
            </props>
        </property>
    </bean>

    <bean id="hibernateTransactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

<!-- End of mySQL DataSource -->

<!-- DB2 DataSource  -->    

    <bean id="DB2dataSource" class="com.ibm.db2.jcc.DB2DataSource">  
        <property name="driverClassName" value="${db2.driver}" />
        <property name="url" value="${db2.url}" />
        <property name="username" value="${db2.user}" />
        <property name="password" value="${db2.password}" />
    </bean>

    <bean id="DB2sessionFactory"
        class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="dataSource" ref="DB2dataSource" />
        <property name="annotatedClasses">
            <list>
                <value>com.gcs.beans.AudTrailBean</value>
                <value>com.gcs.beans.AudTrailDtlBean</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${db2hibernate.dialect}</prop>
                <prop key="hibernate.show_sql">${db2hibernate.show_sql}</prop>
                <prop key="hibernate.hbm2ddl.auto">${db2hibernate.hbm2ddl.auto}</prop>          
            </props>
        </property>
    </bean>

    <bean id="hibernateTransactionManager1"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="DB2sessionFactory" />
    </bean>

<!-- End of DB2 DataSource -->

<bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

<!-- one of the properties available; the maximum file size in bytes -->
<property name="maxUploadSize" value="10000000" />
</bean>

</beans>

我不知道自己弄错了什么。我希望有人能帮助我找到错误。

Answer 1

你的spring-servlet.xml看起来很好。当您尝试注入sessionFactory时，您会收到错误。请尝试以下代码。

@Transactional(value ="hibernateTransactionManager",propagation = Propagation.REQUIRED)
public class FirstDao extends HibernateDaoSupport{


    @Autowired
    public void init(@Qualifier("sessionFactory1") SessionFactory sessionFactory) {
        setSessionFactory(sessionFactory);
    }


    public SampleEstimate fetchEstimate(long objectId){
        SampleEstimate estimate=(SampleEstimate) getSessionFactory().openSession().getNamedQuery("SampleEstimate.findOne").
                                setLong("objectId",objectId).list().get(0);
        return estimate;
    }

    public void saveGroup(SampleEstimateGroup group){
        getHibernateTemplate().saveOrUpdate(group);
    }

}

第二届工厂注入另一个Dao

    @Transactional(value = "hibernateTransactionManager1",propagation = Propagation.REQUIRED,readOnly = false)
public class SecondDao extends HibernateDaoSupport {

    @Autowired
    @Qualifier("secondSessionFactory")
    public void init(SessionFactory sessionFactory){
        setSessionFactory(sessionFactory)   ;
    }

    public SecondDbEntity getSecondDbEntity(){
        return (SecondDbEntity)getHibernateTemplate().findByNamedQuery("SecondDbEntity.findAll").get(0);
    }
}

希望这会有所帮助..

如何在spring-servlet.xml中映射多个数据？

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