Maven & Java: The parameters 'mainClass' for goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java are missing or invalid

Question

My Java EE proj builds fine, but when trying to execute get following error:

gert@gert-VirtualBox:~/workspace/CDBOOKSTORE$ mvn exec:java 
[INFO] Scanning for         


        

Answer 1

If the is outside the , it is the configuration for the plugin to be used no matter what the life-cycle phase is.

If the is inside the , it is the configuration to be used in certain life-cycle phase.

As Vabis has suggested, use mvn exec:java@someID to execute the specific execution of the goal for a plugin.

For more information, please see https://maven.apache.org/guides/mini/guide-configuring-plugins.html.