Maven Plugins - how to require a license

问题

I would like to make my plugin require a license to run similar to the maven clover plugin. Is there some utility out there that I can generate licenses with that will also allow me to integrate that into the plugin?

I need to do the following steps.

1. Modify the existing plugin to validate the license file
2. Generate the license file online and store the information for retrieval later.

Thanks, Walter

来源：https://stackoverflow.com/questions/1548831/maven-plugins-how-to-require-a-license