I have a requirement to have all our properties files be stored in a directory. The location of this directory should be stored in a system environment variable. In my application context I will need to access this environment variable to create the FileSystemResource bean. Here is an example of what I would normally have: 

<bean id="properties" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
        <bean class="org.springframework.core.io.FileSystemResource">
            <constructor-arg>
                <value>myprops.properties</value>
            </constructor-arg>
        </bean>
    </property>
</bean>

Instead I will need to have it be something like 

<value>${prop_file_location}/myprops.properties</value>

Where prop file location is an environment variable. Does anyone know an easy way of doing this?

I am using spring 2.5.6 and java 1.6

java spring
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