config.properties
c3p0.driverClass=com.mysql.jdbc.Driver
xxx=yyyy
加载Properties配置文件
<bean id="applicationConfig" class="org.springframework.context.support.PropertySourcesPlaceholderConfigurer">
<property name="order" value="1"/>
<property name="ignoreUnresolvablePlaceholders" value="true"/>
<!--外置配制-->
<!-- <property name="location" value="file:/var/superaccount/config/config.properties"/> -->
<!--内置配制-->
<property name="location" value="classpath:config/config.properties"/>
</bean>
或另一种写法
<context:property-placeholder location="classpath:jdbbc.properties,classpath:config/xxx.properties"/>
在配制文件引用加载的properties
<property name="driverClass" value="${c3p0.driverClass}" />