ArtifactTransferException:
Failure to transfer org.hibernate:hibernate-core:jar:3.6.10.Final from http://localhost:8081/nexus/content/groups/public/
was cached in the local repository, resolution will not be reattempted until the update interval of nexus has elapsed or updates are forced.
解决办法：
If you are using Eclipse then go to Windows -> Preferences -> Maven and uncheck the "Do not automatically update dependencies from remote repositories" checkbox.
在localRepository目录下搜索*.lastUpdate 文件，全部删除
检查是否配置了mirror，注释了mirror配置试试，为什么注释了mirror就能下载呢？