Load the class can not be found
1. If a series of simple fault (there annotated or have no dependencies have not fully), or there is no load classes in the root directory src / main / java / (package name) in the direct path if these are not
Focus here you .idea deleted files, run
2. The second type of problem
SpringBoot that you want to apply put service first package, so can be introduced into maven repository of resources, so as to import your jar package.
3.Singleton bean creation not allowed while singletons of this factory are in
Port is occupied