replacing file into WAR file which is generated by mvn package

i have a maven project and i want when using clear package maven command to replace config file from source code and replace it with exciting one in the WAR.
i tried but the replacing only happens in extracted folder not WAR file
this is my pom.xml

            <plugin>
				<artifactId>maven-resources-plugin</artifactId>
				<version>3.0.2</version>
				<executions>
					<execution>
						<id>copy-resources</id>
						<phase>package</phase>
						<goals>
							<goal>copy-resources</goal>
						</goals>
						<configuration>
							<overwrite>true</overwrite>
							<outputDirectory>target/Project-xyz/classes/resources</outputDirectory>  
							<resources>
								<resource>
									<directory>${basedir}/src/main/java/resources/customers</directory>
									<filtering>true</filtering>
								</resource>
							</resources>
						</configuration>
					</execution>
				</executions>
			</plugin>

after so many trials it worked by using

> org.apache.maven.plugins

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-war-plugin</artifactId>
    <executions>
        <execution>
            <id>default-war</id>
            <configuration>
                <webResources>
                    <resource>
                        <directory>src/main/webapp/resources/customer1/css</directory>
                        <targetPath>resources/css</targetPath>
                    </resource>
                </webResources>
            </configuration>
        </execution>
    </executions>
</plugin>