applicationContext3.xml

<bean id="dataSource1" class="org.springframework.jndi.JndiObjectFactoryBean">
  <property name="jndiName" value="java:comp/env/jdbc/master/dataSource1" />
</bean>
 <bean id="dataSource2" class="org.springframework.jndi.JndiObjectFactoryBean">
  <property name="jndiName" value="java:comp/env/jdbc/master/dataSource2" />
</bean>
 <bean id="dataSource3" class="org.springframework.jndi.JndiObjectFactoryBean">
  <property name="jndiName" value="java:comp/env/jdbc/master/dataSource3" />
</bean>
 
<bean id="routingDataSource" class="com.nc.datasource.RoutingDataSourceImpl">
  <property name="targetDataSources">
    <map>
      <entry key="ds1" value-ref="dataSource1" />
      <entry key="ds2" value-ref="dataSource2" />
      <entry key="ds3" value-ref="dataSource3" />
    </map>
  </property>
  <property name="defaultTargetDataSource" ref="dataSource1" />
</bean>
 
<bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
  <property name="configLocation" value="classpath:com/nc/ibatis/SQLMapConfig.xml" />
  <property name="dataSource" ref="routingDataSource" />
</bean>