要声明快照存储库，应添加@snapshots(示例中的.snapshot不会考虑到以确定存储库是否可以包含快照) ):

To declare a snapshots repository, you should add @snapshots (the .snapshot in your example are not taken into account to determine if a repository can contain snapshots):

http://nexus.opendaylight.org/content/repositories@id=public, \
http://nexus.opendaylight.org/content/repositories@id=opendaylight@snapshots, \