单数据源配置方式
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mapperLocations" value="classpath:com/mapper/*.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
<property name="basePackage" value="com.mapper" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
多数据源配置方式_1
<bean id="dataSource_1" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="dataSource_2" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="sqlSessionFactory_1" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource_1" />
<property name="mapperLocations" value="classpath:com/mapper/*.xml" />
</bean>
<bean id="sqlSessionFactory_2" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource_2" />
<property name="mapperLocations" value="classpath:com/mapper/*.xml" />
</bean>
<bean id="multipleSqlSessionTemplate" class="com.*.*.MultipleSqlSessionTemplate">
<constructor-arg index="0" ref="masterSqlSessionFactory" />
<property name="targetSqlSessionFactorys">
<map>
<entry value-ref="sqlSessionFactory_1" key="ssf_1"/>
<entry value-ref="sqlSessionFactory_2" key="ssf_2"/>
</map>
</property>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
<property name="basePackage" value="com.mapper" />
<property name="sqlSessionTemplateBeanName" value="multipleSqlSessionTemplate" />
</bean>
参考：https://www.cnblogs.com/FlyHeLanMan/p/6744171.html
多数据源配置方式_2
<bean id="dataSource_1" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="dataSource_2" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="multipleDataSource" class="com.*.*.MultipleDataSource">
<property name="defaultTargetDataSource" ref="dataSource_1" />
<property name="targetDataSources">
<map>
<entry key="ds_1" value-ref="dataSource_1" />
<entry key="ds_2" value-ref="dataSource_2" />
</map>
</property>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="multipleDataSource" />
<property name="mapperLocations" value="classpath:com/mapper/*.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
<property name="basePackage" value="com.mapper" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
参考：https://www.cnblogs.com/digdeep/p/4512368.html