Spring中PropertyPlaceholderConfigurer的使用

转载别人的 记录自己的学习

 

基本的使用方法是:(1)

<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>

接下来我们要使用多个PropertyPlaceholderConfigurer来分散配置,达到整合多工程下的多个分散的Properties 文件,其配置如下:(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属性代表其加载顺序,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

至此你已经了解到了如何使用PropertyPlaceholderConfigurer,如何使用多个Properties文件,以及如何配置多个PropertyPlaceholderConfigurer来分解工程中分散的Properties文件。至于 PropertyPlaceholderConfigurer还有更多的扩展应用,如属性文件加密解密等方法将在之后的博文中续写

posted @ 2012-10-08 21:05  Aaron li  阅读(285)  评论(0编辑  收藏  举报