spring 加载多个资源文件

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> 
<property name="locations"> 
<list> 
<value>WEB-INF/mail.properties</value> 
<value>WEB-INF/jdbc.properties</value> 
</list> 
</property> 
</bean>