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关于系统中使用多个PropertyPlaceholderConfigurer的配置

2010-06-11 22:28 435 查看
今天在配置多个PropertyPlaceholderConfigurer是总是出错,路径也没写错啊,郁闷,就在网上搜了一下,果然是有些属性没有配置导致的,解决办法如下:

基本的使用方法是:(1)

Xml代码



<beanid="propertyConfigurerForAnalysis"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

<propertyname="location">

<value>classpath:/spring/include/dbQuery.properties</value>

</property>

</bean>

<beanid="propertyConfigurerForAnalysis"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<propertyname="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)

Xml代码



<beanid="propertyConfigurer"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

<propertyname="locations">

<list>

<value>classpath:/spring/include/jdbc-parms.properties</value>

<value>classpath:/spring/include/base-config.properties</value>

</list>

</property>

</bean>

<beanid="propertyConfigurer"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<propertyname="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)

Xml代码



<beanid="propertyConfigurerForProject1"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

<propertyname="order"value="1"/>

<propertyname="ignoreUnresolvablePlaceholders"value="true"/>

<propertyname="location">

<value>classpath:/spring/include/dbQuery.properties</value>

</property>

</bean>


Java代码


<beanid="propertyConfigurerForProject2"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<propertyname="order"value="2"/>
<propertyname="ignoreUnresolvablePlaceholders"value="true"/>
<propertyname="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。

摘自:http://seraph115.javaeye.com/blog/435165
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