Spring boot and maven build number plugin - maven

Question

I am using Spring boot 2.0.5,and added code to generate build number using maven build number plugin. The build number is generating fine. I can see on jar and in the builNumber.properties file but its not being substituted in finalName in version.txt file.
Additional details:
Here is my POM.
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>buildnumber-maven-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<id>buildNumber</id>
<phase>validate</phase>
<goals>
<goal>create</goal>
</goals>
</execution>
</executions>
<configuration>
<format>{0,number}</format>
<items>
<item>buildNumber</item>
</items>
<doCheck>false</doCheck>
<doUpdate>false</doUpdate>
<revisionOnScmFailure>unknownbuild</revisionOnScmFailure>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<finalName>${project.artifactId}-${project.version}.${buildNumber}</finalName>
</build>
I have created version.txt file in resources folder and it has following text.
#project.build.finalName#
On maven clean install this file is updated in target folder. In below logs line # 2 you can see build number is added to jar file name.
[INFO] --- maven-jar-plugin:2.6:jar (default-jar) # try ---
[INFO] Building jar: /home/ubuntu/Spring/SpringBootData-REST/target/try-0.0.1-SNAPSHOT.10.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:2.0.5.RELEASE:repackage (default) # try ---
[INFO]
[INFO] --- maven-install-plugin:2.5.2:install (default-install) # try ---
[INFO] Installing /home/ubuntu/Spring/SpringBootData-REST/target/try-0.0.1-SNAPSHOT.10.jar to /home/ubuntu/.m2/repository/com/try/0.0.1-SNAPSHOT/try-0.0.1-SNAPSHOT.jar
[INFO] Installing /home/ubuntu/Spring/SpringBootData-REST/pom.xml to /home/ubuntu/.m2/repository/com/try/0.0.1-SNAPSHOT/try-0.0.1-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
But buildNumber is not replaced in version.txt.
Here is how it looks after maven clean install.
try-0.0.1-SNAPSHOT.${buildNumber}
Here is buildNumber.properties file with the buildNumber.
#maven.buildNumber.plugin properties file
#Sat Mar 09 11:51:51 CST 2019
buildNumber=10
Can you point out whats wrong?

Answer 1

So I found a workaround.
Changed my Version.txt to below instead of #project.build.finalName# and its working fine now.
#project.artifactId#
#project.version#
#buildNumber#
Output
SpringBootDataRest
1.0
15