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目录下的文件写法。 当存在多个Properties文件时，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> 接下来咱们要使用多个PropertyPlaceholderConfigurer来分散配置，达到整合多工程下的多个分散的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属性表明其加载顺序，而ignoreUnresolvablePlaceholders为是否忽略不可解析的 Placeholder，如配置了多个PropertyPlaceholderConfigurer，则需设置为true