1. Failure to transfer...
This error is basically required jar package does not exist, or download does not complete, the integrity of the local warehouse to go view the jar file
solution:
Delete the corresponding jar package, download it again (after you delete, update depandences can), until the jar complete package
2. java.lang.NoClassDefFoundError
Such errors are generally in the presence of a class jar file, but failure to download the file (* .sha1-in-progress file appears in the folder)
solution:
Delete the corresponding jar package, download it again (after you delete, update depandences can), until the jar complete package
Detailed Description Reference java.lang.NoClassDefFoundError: https://blog.csdn.net/jamesjxin/article/details/46606307