4.0.0 property-exp-custom-config 0.0.1-SNAPSHOT property-exp-custom-config jar com.baeldung.spring-boot-modules spring-boot-property-exp 0.0.1-SNAPSHOT org.springframework.boot spring-boot-starter ${spring-boot.version} org.springframework.boot spring-boot-starter-test ${spring-boot.version} test org.junit.vintage junit-vintage-engine ${basedir}/src/main/resources true **/application*.yml **/application*.yaml **/application*.properties ${basedir}/src/main/resources true **/application*.yml **/application*.yaml **/application*.properties org.apache.maven.plugins maven-resources-plugin ${apache-maven.version} @ true org.codehaus.mojo exec-maven-plugin com.baeldung.propertyexpansion.SpringBootPropertyExpansionApp Custom Property Value 2.7