maven学习--maven编译时包没法下载的问题

前言 今天在编译运行一个maven项目时编译失败，查看了一下报错缘由，以下：web [ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check (checkstyle) on project labmanagement: Execution checkstyle of goal

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