spring applicationContext.xml配置

当applicationContext.xml,item-servlet.xml,jdbc.properties是放在WEB-INF目录下时，配置如下即可 【

  <bean id="propertyConfigurer"

  class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

  <property name="locations">

   <list>

    <value>WEB-INF/jdbc.properties</value>

   </list>

  </property>

 </bean>

当放在src目录下时 配置需要如下编写【<bean id="propertyConfigurer"

  class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

  <property name="locations">

   <list>

    <value>classpath:source/jdbc/jdbc.properties</value>

   </list>

  </property>

 </bean>】

如果 放在src下配置写成<value>source/jdbc/jdbc.properties</value>则会报如下错误：

org.springframework.beans.factory.BeanInitializationException: Could not load properties; nested exception is Java.io.FileNotFoundException:
Could not open ServletContext resource [/source/jdbc/jdbc.properties]