gistfile1.txt

<plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-resources-plugin</artifactId>
      <version>3.2.0</version>
      <configuration>
        <outputDirectory>${project.build.directory}/modified</outputDirectory>
        <resources>
          <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
          </resource>
        </resources>
        <delimiters>
          <delimiter>@@</delimiter>
        </delimiters>
      </configuration>
      <executions>
        <execution>
          <id>copy-resources</id>
          <phase>process-resources</phase>
          <goals>
            <goal>copy-resources</goal>
          </goals>
        </execution>
      </executions>
    </plugin>