java - pom.xml 中出现错误。显示连接超时。我的网络代理不允许连接到 Maven

Question

当我尝试在项目中使用 Maven 时，构建时出现以下错误:

CoreException: Could not calculate build plan: Plugin org.apache.maven.plugins:maven-compiler-plugin:3.5.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:3.5.1: ArtifactResolutionException: Failure to transfer org.apache.maven.plugins:maven-compiler-plugin:pom:3.5.1 from https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:3.5.1 from/to central (https://repo.maven.apache.org/maven2): connect timed out

Answer 1

您的连接已超时 - 确保您已连接到互联网(例如，尝试从命令行ping repo.maven.apache.org)。如果您位于代理服务器后面，则必须相应地添加配置 ( https://maven.apache.org/guides/mini/guide-proxies.html )。

一旦您确保互联网连接正常，您可以通过在命令中附加 -U 标志来强制 Maven 重新尝试传输。