4.0.0 com.example helloworld 0.0.1-SNAPSHOT helloworld jar Demo project for simple helloworld in java 1.8 1.8 maven-assembly-plugin 3.1.1 com.example.helloworld.HelloWorldApplication jar-with-dependencies make-assembly package single com.sparkjava spark-core 2.7.2 org.slf4j slf4j-simple 1.7.21