我已经将Eclipse Luna与M2E插件一起使用了一段时间。我最近决定升级到Eclipse Mars，但在此之前，我将所有Maven插件升级到最新版本。一旦我这样做了，我就验证了所有内容都建立在comamnd行上并且还内置在Eclipse中。然后我启动了Eclipse Mars，安装了最新的M2E插件，并开始导入我的项目。不幸的是，事情并没有那么顺利。我收到以下错误：
CoreException: Could not get the value for parameter compilerId for plugin execution default-compile:
PluginResolutionException: Plugin org.apache.maven.plugins:maven-compiler-plugin:3.5 or one of its dependencies could not be resolved:
The following artifacts could not be resolved:
org.apache.maven:maven-plugin-api:jar:3.0,
org.apache.maven:maven-model:jar:3.0
org.sonatype.sisu:sisu-inject-plexus:jar:1.4.2
org.apache.maven:maven-artifact:jar:3.0
org.apache.maven:maven-core:jar:3.0
org.apache.maven:maven-settings:jar:3.0
org.apache.maven:maven-settings-builder:jar:3.0
org.apache.maven:maven-repository-metadata:jar:3.0
org.apache.maven:maven-model-builder:jar:3.0
org.apache.maven:maven-aether-provider:jar:3.0
org.sonatype.aether:aether-impl:jar:1.7
org.sonatype.aether:aether-spi:jar:1.7
org.sonatype.aether:aether-api:jar:1.7
org.codehaus.plexus:plexus-classworlds:jar:2.2.3
org.apache.maven:maven-toolchain:jar:2.2.1:
Failure to transfer org.apache.maven:maven-plugin-api:jar:3.0 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:maven-plugin-api:jar:3.0 from/to central (https://repo.maven.apache.org/maven2):
sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to
find valid certification path to requested target pom.xml /pacbridge-utl line 4 Maven Project Build Lifecycle Mapping Problem
Execution default-resources of goal org.apache.maven.plugins:maven-resources-plugin:2.6:resources failed:
Plugin org.apache.maven.plugins:maven-resources-plugin:2.6 or one of its dependencies could not be resolved:
The following artifacts could not be resolved:
org.apache.maven:maven-plugin-api:jar:2.0.6
org.apache.maven:maven-project:jar:2.0.6
org.apache.maven:maven-profile:jar:2.0.6
org.apache.maven:maven-artifact-manager:jar:2.0.6
org.apache.maven:maven-plugin-registry:jar:2.0.6
org.apache.maven:maven-core:jar:2.0.6
org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.6
org.apache.maven:maven-repository-metadata:jar:2.0.6
org.apache.maven:maven-error-diagnostics:jar:2.0.6
org.apache.maven:maven-plugin-descriptor:jar:2.0.6
org.apache.maven:maven-artifact:jar:2.0.6
org.apache.maven:maven-settings:jar:2.0.6
org.apache.maven:maven-model:jar:2.0.6
org.apache.maven:maven-monitor:jar:2.0.6:
Failure to transfer org.apache.maven:maven-plugin-api:jar:2.0.6 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:maven-plugin-api:jar:2.0.6 from/to central (https://repo.maven.apache.org/maven2):
sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException:
unable to find valid certification path to requested target (org.apache.maven.plugins:maven-resources-plugin:2.6:resources:default-resources:process-resources)
我比较了我的Eclipse设置（在Luna和Mars之间），一切看起来都一样。特别是，我确保Windows /首选项/常规/网络连接是相同的（即我的代理设置正确）并且我已经尝试运行＆＃34; mvn -U clean install＆＃34;从命令行。正如我所说，命令行构建运行良好，但Eclipse Mars只是不会构建。谁有人建议解决方案？顺便说一句：我使用Maven 3.3.3和Java 8
感谢。
答案 0 :(得分：0)
事实证明，M2E插件使用了错误的Settings.xml文件，该文件没有引用正确的插件存储库。一旦我修复了它（在Windows-＆gt; Preferences-＆gt; Maven-＆gt;用户设置），事情就开始重新开始了。