报错信息如下：
Failed to execute goal org.apache.maven.plugins:maven-install-plugin:2.4:install (default-install) on project ocProject: Execution default-install of goal org.apache.maven.plugins:maven-install-plugin:2.4:install failed: Plugin org.apache.maven.plugins:maven-install-plugin:2.4 or one of its dependencies could not be resolved: Failure to find org.codehaus.plexus:plexus-utils:jar:1.1 in http://localhost:8081/nexus/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of maven.net.cn has elapsed or updates are forced -> [Help 1]
[ERROR]
请问老师，怎样解决，谢谢