運行 mvn help:system 后出現(xiàn)的問題，錯誤信息如下：

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 17.008 s
[INFO] Finished at: 2018-08-10T14:22:12+08:00
[INFO] Final Memory: 6M/123M
[INFO] ------------------------------------------------------------------------
[ERROR] No plugin found for prefix 'help' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (D:\maven\repository), central (https://repo.maven.apache.org/maven2)] -> [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/NoPluginFoundForPrefixException

我根據(jù)網(wǎng)上的一些資料，配置了 settings.xml 里的 mirrors 標簽，試了很多個，都不行
我兩臺電腦上都出現(xiàn)了這個問題，Maven 3.5、3.3、3.2 都出現(xiàn)這個問題，環(huán)境是 JDK1.7 求助?。?/p>