Maven 无法从 https://repo.maven.apache.org/maven2 下载依赖项/插件

Question

尝试构建项目时出现以下错误：

Failed to collect dependencies at org.msgpack:jackson-dataformat-msgpack:jar:0.8.17 -> com.fasterxml.jackson.core:jackson-databind:jar:2.9.9: Failed to read artifact descriptor for com.fasterxml.jackson.core:jackson-databind:jar:2.9.9: Could not transfer artifact com.fasterxml.jackson.core:jackson-databind:pom:2.9.9 from/to maven (https://repo1.maven.org/maven2): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

我读到问题出在http://repo1.maven.org/maven2 上，我需要将其更改为 https。 这样做了，还是不行。 然后我在google中找到了另一个建议->使用keytool添加maven证书并重新启动。 做到了。 还是不行。 请一位同事将他们的 repo 发送给我并且它起作用了（ofc，有所有依赖项）。 然后我想在我们的junit测试中引入类别，所以我添加了surefire插件，这次问题是类似的：

Unable to generate classpath: org.apache.maven.artifact.resolver.ArtifactResolutionException: 
Unable to get dependency information for org.apache.maven.surefire:surefire-grouper:jar:2.12.4: Failed to retrieve POM for org.apache.maven.surefire:surefire-grouper:jar:2.12.4: 
Could not transfer artifact org.apache.maven.surefire:surefire-grouper:pom:2.12.4 from/to maven (https://repo1.maven.org/maven2): sun.security.validator.ValidatorException: 
PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: u
nable to find valid certification path to requested target [ERROR]   org.apache.maven.surefire:surefire-grouper:jar:2.12.4
[ERROR]
[ERROR] from the specified remote repositories:
[ERROR]   maven (https://repo1.maven.org/maven2, releases=true, snapshots=true),
[ERROR]   central (https://repo.maven.apache.org/maven2, releases=true, snapshots=false),
[ERROR]   apache.snapshots (http://repository.apache.org/snapshots, releases=false, snapshots=true)
[ERROR] Path to dependency:
[ERROR]         1) dummy:dummy:jar:1.0
[ERROR]         2) org.apache.maven.surefire:surefire-junit47:jar:2.12.4
[ERROR]         3) org.apache.maven.surefire:common-junit48:jar:2.12.4

所以我决定去一个一个下载，但这是一个地狱，我更喜欢解决这个问题而不是手动下载所有东西。

Answer 1

事实证明，问题出在我们的防火墙上——它以某种方式阻止了对所有 Maven 存储库的请求。 当我要求 IT 人员停止并对其进行测试时，maven 能够从标准 maven 存储库（带有 https 的存储库）下载所有内容