有的时候，我在一个工程中需要访问两个以上的数据源，尤其是在系统集成的时候，以下是我在系统集成的时候遇到的情况，我的工程的架构是：spring2.0+ibatis2.0+struts1.2. 数据库是oracle数据库，而需要集成的系统是sql server数据库，对方没有提供接口，要求直接操作sql server库。以下是spring配置文件中配置了两个数据源，包括service事务。实际上要把applicationContext.xml中的dao部分独立到daoContext.xml文件中，为了节省篇幅，就放到了一起。
jdbc.properties文件内容如下：jdbc2.driverClassName=net.sourceforge.jtds.jdbc.Driverjdbc2.url=jdbc:jtds:sqlserver://10.101.122.9:1433/testdb;charset=gb2312jdbc2.username=user1jdbc2.password=password
jdbc.driverClassName=oracle.jdbc.driver.OracleDriverjdbc.url=jdbc:oracle:thin:@10.101.126.29:1521:DBSERVERjdbc.username=user1jdbc.password=password
applicationContext.xml配置文件内容如下：<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd"><beans><bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="locations"> <list> <value>jdbc.properties</value> </list></property></bean><!-- =========================transactionManager========================= --><bean id="autoProxyCreator" class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"><property name="beanNames"> <value>*Service</value></property><property name="interceptorNames"> <list> <value>transactionInterceptor</value> <value>transactionInterceptor2</value> </list></property></bean>
<!-- =========================oracle dataSource========================= --><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driverClassName}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/>
</bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"/></bean> <bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor"> <property name="transactionManager" ref="transactionManager"/> <property name="transactionAttributes"> <props> <prop key="insert*">PROPAGATION_REQUIRED</prop> <prop key="delete*">PROPAGATION_REQUIRED</prop> <prop key="update*">PROPAGATION_REQUIRED</prop> <prop key="do*">PROPAGATION_REQUIRED</prop> </props> </property></bean><bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean"> <property name="configLocation" value="sql-map-config.xml"/> <property name="dataSource" ref="dataSource"/></bean><!-- =========================sqlserver dataSource========================= --> <bean id="dataSource2" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc2.driverClassName}"/> <property name="url" value="${jdbc2.url}"/> <property name="username" value="${jdbc2.username}"/> <property name="password" value="${jdbc2.password}"/></bean> <bean id="transactionManager2" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource2"/></bean><bean id="transactionInterceptor2" class="org.springframework.transaction.interceptor.TransactionInterceptor"> <property name="transactionManager" ref="transactionManager2"/> <property name="transactionAttributes"> <props> <prop key="insert*">PROPAGATION_REQUIRED</prop> <prop key="delete*">PROPAGATION_REQUIRED</prop> <prop key="update*">PROPAGATION_REQUIRED</prop> <prop key="do*">PROPAGATION_REQUIRED</prop> </props> </property></bean> <bean id="sqlMapClient2" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean"> <property name="configLocation" value="sql-map-config.xml"/> <property name="dataSource" ref="dataSource2"/></bean>
<!-- =========================for example ========================= --> <bean id="FirstDAO" class="com.demo.impl.FirstDAOImpl"> <property name="sqlMapClient" ref="sqlMapClient"/></bean> <bean id="SecondDAO" class="com.demo.impl.SecondDAOImpl"> <property name="sqlMapClient" ref="sqlMapClient2"/></bean>
<bean id="FirstService" class="com.demo.impl.FirstServiceImpl"> <property name="firstDAO" ref="FirstDAO"/> </bean> <bean id="SecondService" class="com.demo.impl.SecondServiceImpl"> <property name="secondDAO" ref="SecondDAO"/> </bean></beans>
