How to override resource file defined in a Jar?

In a file struc开发者_如何转开发ture of standard J2EE Web application, I want to override a key-value message pair that defined in a resource file that reside in an imported Jar. I know that I need to create a resource file with the same name of which I want to override, But where should I put the file in my web application so that the message key defined in my resource file will override that of same key defined in the resource file in Jar?

<application dir>/WEB-INF/classes/path/of/the/resource/to/override