Automatic dependencies is one of the powerful feature of Apache maven and its one of the reason Maven is very popular in developer community. Maven resolve the dependent library from local repository which is again connected with central repository or remote repository. thus we can say that Maven has 3 kinds of repository concept.
1. Local repostory e.g $USER_HOME/.m2
2. Central repostory e.g http://repo.maven.apache.org/maven2/
3. Private repostory e.g Sonatype Nexus, Artifactory, Archiva etc.
The diagram shown below represent how maven resolve the dependendency. Read more click here
Reference:- This article was originally posted on scmGalaxy.com