ssm mysql主从配置

<bean id="dataSourceMaster" class="com.alibaba.druid.pool.DruidDataSource">
    <property name="url" value="jdbc:mysql://master_host:3306/db_name?useSSL=false&amp;serverTimezone=UTC"/>
    <property name="username" value="master_username"/>
    <property name="password" value="master_password"/>
</bean>

<bean id="dataSourceSlave" class="com.alibaba.druid.pool.DruidDataSource">
    <property name="url" value="jdbc:mysql://slave_host:3306/db_name?useSSL=false&amp;serverTimezone=UTC"/>
    <property name="username" value="slave_username"/>
    <property name="password" value="slave_password"/>
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSourceMaster"/> <!-- 默认使用主库 -->
    <property name="configLocation" value="classpath:mybatis-config.xml"/>
    <property name="mapperLocations" value="classpath:mapper/*.xml"/>
</bean>

<!-- 读写分离配置 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSourceMaster"/>
</bean>

<bean id="routingDataSource" class="com.example.RoutingDataSource">
    <property name="targetDataSources">
        <map key-type="java.lang.String">
            <entry key="MASTER" value-ref="dataSourceMaster"/>
            <entry key="SLAVE" value-ref="dataSourceSlave"/>
        </map>
    </property>
    <property name="defaultTargetDataSource" ref="dataSourceMaster"/>
</bean>