Spring bean配置读取配置文件

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在beans.xml中加入两个必须的bean

<bean id="propertyConfigurer"     class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">      <property name="location" value="/WEB-INF/jdbc.properties" />      </bean>   <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"     destroy-method="close">     <property name="driverClassName" value="${jdbc.driverClassName}" />     <property name="url" value="${jdbc.url}" />     <property name="username" value="${jdbc.username}" />     <property name="password" value="${jdbc.password}" />  </bean>

在web-inf下面的jdbc.properties

jdbc.driverClassName=com.mysql.jdbc.Driver     jdbc.url=jdbc:mysql://210.30.12.3:3306/spring     jdbc.username=root     jdbc.password=sa

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  <!-- 定义受环境影响易变的变量 -->    <bean id="properties" class="org.springframework.beans.factory.config.PropertiesFactoryBean"><property name="locations"><list><!-- 标准配置 --><value>classpath*:/application.properties</value></list></property></bean>

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