Spring中PropertyPlaceholderConfigurer的使用

基本的使用方法是： <bean id="propertyConfigurerForAnalysis" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">     <property name="location">         <value>classpath:/spring/include/dbQuery.properties</value>     </property> </bean> 其中classpath是引用src目錄下的文件寫法。 當存在多個Properties文件時，配置就需使用locations了：(2) <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">     <property name="locations">        <list>           <value>classpath:/spring/include/jdbc-parms.properties</value>           <value>classpath:/spring/include/base-config.properties</value>         </list>     </property> </bean> 接下來咱們要使用多個PropertyPlaceholderConfigurer來分散配置，達到整合多工程下的多個分散的Properties 文件，其配置以下：(3) <bean id="propertyConfigurerForProject1" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">     <property name="order" value="1" />     <property name="ignoreUnresolvablePlaceholders" value="true" />     <property name="location">        <value>classpath:/spring/include/dbQuery.properties</value>     </property> </bean> <bean id="propertyConfigurerForProject2" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">     <property name="order" value="2" />     <property name="ignoreUnresolvablePlaceholders" value="true" />     <property name="locations">       <list>         <value>classpath:/spring/include/jdbc-parms.properties</value>         <value>classpath:/spring/include/base-config.properties</value>       </list>     </property> </bean> 其中order屬性表明其加載順序，而ignoreUnresolvablePlaceholders爲是否忽略不可解析的 Placeholder，如配置了多個PropertyPlaceholderConfigurer，則需設置爲true