CentOS系统中Maven编译出错 dependencies could not be resolved

[INFO] Scanning for projects...

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[INFO] Building zkui 2.0-SNAPSHOT

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Downloading: http://maven.oschina.net/content/groups/public/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom
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[INFO] BUILD FAILURE

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[INFO] Total time: 0.983 s

[INFO] Finished at: 2016-09-01T19:53:30-07:00

[INFO] Final Memory: 11M/95M

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[ERROR] Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.5
from/to osc (http://maven.oschina.net/content/groups/public/): maven.oschina.net: Temporary failure in name resolution: Unknown host maven.oschina.net: Temporary failure in name resolution -> [Help 1]

[ERROR] 

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR] 

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException
解决方法：把/etc/resolv.conf文件打开，最末尾加上以下两行:

# Generated by NetworkManager
nameserver 8.8.8.8
nameserver 8.8.4.4