Maven Resources Plugin

Specifying resource directories

   <resources><resource><directory>resource1</directory></resource><resource><directory>resource2</directory></resource><resource><directory>resource3</directory></resource></resources>

Filtering

      <resource><directory>src/main/resources</directory><filtering>true</filtering></resource>

But to organize your project, you may want to put all your variables and their values in a separate file so that you will not have to rewrite your POM, or set their values all the time with every build. This can be done by adding a filter.

    <project>...<name>My Resources Plugin Practice Project</name>...<build>...<filters><filter>[a filter property]</filter></filters>...</build>...</project>

Including and excluding files and directories

    <project>...<name>My Resources Plugin Practice Project</name>...<build>...<resources><resource><directory>src/my-resources</directory><includes><include>**/*.txt</include></includes><excludes><exclude>**/*test*.*</exclude></excludes></resource>...</resources>...</build>...</project>

Copy Resources

    <project>...<build><plugins><plugin><artifactId>maven-resources-plugin</artifactId><version>3.1.0</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>