Some time ago wrote a SpringBoot projects, some of the information for automatic synchronization, some time ago also good, no problem, did not make any changes to start on the error, get a long time, also delete all local libraries Spring framework jar package, or not, but unfortunately they do not want to delete all the back and also download, though not much time to waste, but do not want waited, then check the information, may be some of the jar package dependencies or conflicts problematic jar package leads, checked a bit.
Execute the command: dependency: purge-local-Repository
dependency plug-in provides a goal can easily delete local directory of the project depends on the jar package, thus avoiding some of the innocent jar package is deleted, but having said that problems caused by packet or jar.