[Java知识库]解决：[ERROR] Error executing Maven.[ERROR] 1 problem was encountered while building the effective set

1、昨天安装maven时，修改了配置文件发现如下错误

? ? ? ? 先观察错误类型，

[ERROR] Error executing Maven.
[ERROR] 1 problem was encountered while building the effective settings
[FATAL] Non-parseable settings E:\apache-maven\apache-maven-3.8.3\conf\settings.xml: Duplicated tag: 'mirrors' (position: START_TAG seen ...</mirrors>\r\n  <mirrors>... @167:12)  @ E:\apache-maven\apache-maven-3.8.3\conf\settings.xml, line 167, column 12

2、原因：maven? 的配置文件? setting.xml错误。

? ? ? ? 多余mirrors

?3、再次验证：已解决！

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