The classifier in Maven

Classifier is probably the most overlooked Maven feature, but it is really important and we need it to help plan coordinates. Imagine a case in which a jar project would be Dog-cli-1.0.jar, and running it would make it possible for the user to draw a puppy on the command line. Now the user's request is that you can provide a zip package that contains not only the runnable jar, but also the source code and documentation, in other words, this is a more formal distribution package. What should be the name of this file? Dog-cli-1.0.zip. Not clear enough, just from the extension it is hard to tell what is maven default generated artifacts and what is the additional configuration of the raw component bundle. It would be best if it were dog-cli-1.0-dist.zip. The dist here is classifier, and the default MAVEN generates only one artifact, which we call the main component, and we can use classifier when we want MAVEN to generate other affiliate artifacts. Common classifier also like Dog-cli-1.0-sources.jar expression source package, Dog-cli-1.0-javadoc.jar represents Javadoc package and so on. There are a variety of ways to make classifier, the most important of which is the use of Maven Assembly Plugin, which interested readers can explore further.