Spring MyBatis Oracle 多数据源

数据源1

<bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="oracle.jdbc.OracleDriver" />
        <property name="url" value="jdbc:oracle:thin:@//IP地址1:1521/数据库名1" />
        <property name="username" value="用户名" />
        <property name="password" value="密码" />
</bean>
<bean id="sqlSessionFactory1" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource1" />
        <property name="configLocation" value="classpath:myBatis/myBatis-Configuration1.xml" />
</bean>
<bean id="mapper1" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.zxg.dao1" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory1" />
</bean>
<bean id="transactionManager1" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource1" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager1" />

数据源2

<bean id="dataSource2" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="oracle.jdbc.OracleDriver" />
        <property name="url" value="jdbc:oracle:thin:@//IP地址2:1521/数据库名2" />
        <property name="username" value="用户名" />
        <property name="password" value="密码" />
</bean>
<bean id="sqlSessionFactory2" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource2" />
        <property name="configLocation" value="classpath:myBatis/myBatis-Configuration2.xml" />
</bean>
<bean id="mapper2" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.zxg.dao2" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory2" />
</bean>
<bean id="transactionManager2" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource2" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager2" />

注：xx1Mapper.java  和  xx1Mapper.xml      、 xx2Mapper.java 和 xx2Mapper.xml

     上下文中不能出现同名的

结果：操作db1 调用 mapper1 ，操作db2 调用 mapper2

配置多数据源时需注意的单元测试问题：

@ContextConfiguration(locations = { "classpath*:spring/root/private_*.xml" })
@RunWith(SpringJUnit4ClassRunner.class)
@Transactional

如果 @Transactional 不指定具体的，会报异常

java.lang.IllegalStateException: Failed to retrieve PlatformTransactionManager for @Transactional test for test context

需要具体指定一个 TransactionManager 

例如：

@Transactional("txManagerAlpha")