spring properties的引入
<bean id="propertyConfigurer"
value="/WEB-INF/jdbc.properties"/>
<!--
<property name="location" value="classpath*:data.properties"/>
-->
</bean>
<bean id="dataSource" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
