To only "print it (any "maven properties") to log":

1. pom.xml:

   <properties>
     <foo>bar</foo>
     ...
   

   (this can be used throughout the pom...)

2. application.properties:

   my.domain.someKey=@foo@
   

3. Some bean referencing it as @Value("${my.domain.someKey})String foo.

4. ...and logging it. (LOGGER.info(foo))

Refs:

• https://docs.spring.io/spring-boot/docs/2.6.2/maven-plugin/reference/htmlsingle/#using
• https://maven.apache.org/plugins/maven-resources-plugin/examples/filter.html

  Note: Since the application.properties and application.yml files accept Spring style placeholders (${…​}), the Maven filtering is changed to use @..@ placeholders. (You can override that by setting a Maven property called resource.delimiter.)

A "production ready" spring-boot (web exposure) approach:

Assuming this spring-boot-starter(web,actuator).

We add this to our application.properties:

# we need this (jmx is exposed by default):
management.endpoints.web.exposure.include=info
# ... and this (enables info.* properties):
management.info.env.enabled=true
# ...then can write here arbitrary values, starting with info.*
info.foo=foo
# ...or "filtered" from the pom, like e.g:
info.app.spring-boot.version=@project.parent.version@
# we can use here also any pom.properties like @my.property@
# for pessimistic enablement/opt out:
#management.endpoints.enabled-by-default=false 
#management.endpoint.info.enabled=true

And find them at http://localhost:8080/actuator/info , like:

{"foo":"foo","app":{"spring-boot":{"version":"2.6.2"}}}

Refs:

• https://docs.spring.io/spring-boot/docs/current/reference/html/actuator.html#actuator.endpoints.info (mainly)