请问spring怎么样重新初始化数据库连接池

</bean>
    <!-- 配置数据源 -->
    <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}" />
        <property name="initialSize" value="${jdbc.initialSize}" />
        <property name="maxActive" value="${jdbc.maxActive}" />
        <property name="maxIdle" value="${jdbc.maxIdle}" />
        <property name="minIdle" value="${jdbc.minIdle}" />
        <property name="poolPreparedStatements" value="${jdbc.poolPreparedStatements}" />
        <property name="defaultAutoCommit" value="${jdbc.defaultAutoCommit}" />
        <property name="validationQuery" value="select * from dual"/>
    </bean>
在spring的配置文件中加入“<property name="validationQuery"