You could use the Maven Resources Plugin and its resources:copy-resources
mojo. From the Examples:
You can use the mojo copy-resources to
copy resources which are not in the
default maven layout or not declared
in the build/resources element and
attach it to a phase
<project>
...
<build>
<plugins>
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>2.4.3</version>
<executions>
<execution>
<id>copy-resources</id>
<!-- here the phase you need -->
<phase>validate</phase>
<goals>
<goal>copy-resources</goal>
</goals>
<configuration>
<outputDirectory>${basedir}/target/extra-resources</outputDirectory>
<resources>
<resource>
<directory>src/non-packaged-resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
...
</build>
...
</project>
Another option would be to use the Maven AntRun Plugin and Ant filtering capabilities (e.g. with the Filter and/or the Copy tasks) but the above looks just fine.