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

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[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building zkui 2.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: http://maven.oschina.net/content/groups/public/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.983 s
[INFO] Finished at: 2016-09-01T19:53:30-07:00
[INFO] Final Memory: 11M/95M
[INFO] ------------------------------------------------------------------------
[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 NetworkManagernameserver 8.8.8.8nameserver 8.8.4.4

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