title: How to use properties in a Spring project to configure log4j.xml
body: <p>I have multiple properties files in my Spring project.  The spring context loads these properties and handles property overriding in a convenient manner.  Is there a way to take the properties that are available to my Spring configuration XML files (ie. <code>${myprop}</code>) and use them in a similar fashion in my <code>log4j.xml</code> file?  I know that I can pass system properties to log4j using <code>-Dprop=value</code> on startup, but I would prefer having all of the configuration in the properties files in my project.  Is this possible?</p>
  
  <p>My app runs in Tomcat.</p>