java - Set System Property With Spring Configuration File

Question

Configuration:
Spring 2.5, Junit 4, Log4j
The log4j file location is specified from a system property

${log.location}

At runtime, system property set with -D java option. All is well.

Problem / What I Need:
At unit test time, system property not set, and file location not resolved.
App uses Spring, would like to simply configure Spring to set the system property.

More Info:
Requirement is for configuration only. Can't introduce new Java code, or entries into IDE. Ideally, one of Spring's property configuration implementations could handle this--I just haven't been able to find the right combination.

This idea is close, but needs to add Java code:
Spring SystemPropertyInitializingBean

Any help out there? Any ideas are appreciated.

Answer 1

There was a request in the comments for a Spring 3 example on how to do this.

<bean id="systemPrereqs"
    class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
    <property name="targetObject" value="#{@systemProperties}" />
    <property name="targetMethod" value="putAll" />
    <property name="arguments">
        <!-- The new Properties -->
        <util:properties>
            <prop key="java.security.auth.login.config">/super/secret/jaas.conf</prop>
        </util:properties>
    </property>
</bean>