4.0.0 org.slf4j slf4j-parent 2.1.0-alpha1 ../parent/pom.xml slf4j-simple jar SLF4J Simple Provider SLF4J Simple Provider http://www.slf4j.org org.slf4j.simple org.slf4j.simple.SimpleServiceProvider simple org.slf4j slf4j-api org.slf4j slf4j-testing ${project.version} test org.apache.maven.plugins maven-compiler-plugin ${maven-compiler-plugin.version} module-compile compile compile ${jdk9.version} ${project.basedir}/src/main/java9 true