druid 数据源 使用属性文件的一个坑

<bean id="propertiesFactoryBean"
          class="org.springframework.beans.factory.config.PropertiesFactoryBean">
        <property name="locations">
            <list>
                <value>classpath*:properties/druid.properties</value>
            </list>
        </property>
    </bean>

    <context:property-placeholder properties-ref="propertiesFactoryBean"/>

    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <property name="url" value="${jdbc-url}"/>
        <property name="username" value="${username}"/>
        <property name="password" value="${jdbc-pwd}"/>
        <property name="initialSize" value="1"/>
        <property name="minIdle" value="1"/>
        <property name="maxActive" value="20"/>
        <property name="maxWait" value="60000"/>
        <property name="timeBetweenEvictionRunsMillis" value="60000"/>
        <property name="minEvictableIdleTimeMillis" value="300000"/>
        <property name="validationQuery" value="select 1 from dual"/>
        <property name="testWhileIdle" value="true"/>
        <property name="testOnBorrow" value="false"/>
        <property name="testOnReturn" value="false"/>
        <property name="poolPreparedStatements" value="true"/>
        <property name="maxPoolPreparedStatementPerConnectionSize" value="20"/>
        <property name="filters" value="stat" />
    </bean>

jdbc-url=jdbc:oracle:thin:@localhost:1521:orcl
jdbc-driver=oracle.jdbc.driver.OracleDriver
username=test
jdbc-pwd=123456

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"      init-method="init" destroy-method="close">    <property name="url" value="${jdbc-url}"/>    <property name="username" value="${jdbc-user}"/>    <property name="password" value="${jdbc-pwd}"/>