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我正在使用我昨天购买的由 TransIP 托管的 vps。每个插件都像它应该的那样工作，除了 maven。我重新安装了很多次，它似乎一直都在出错。
我在安装 ubuntu 15.10 后所做的是:
- sudo apt-get install openjdk-8-jdk
- sudo apt-get 安装 maven
然后我将我的存储库从 github 克隆到以我的名字命名的用户文件夹中:
路径:/home/mart/[仓库所在文件夹]
完成后，我转到文件夹并使用:mvn clean install。它给了我这个错误:
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Discordbot 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.782 s
[INFO] Finished at: 2016-03-13T14:51:14+01:00
[INFO] Final Memory: 6M/15M
[INFO] ------------------------------------------------------------------------
[ERROR] Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.5 from/to central (https://repo.maven.apache.org/maven2): java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException
我的第二个想法是，也许我可以在不需要运行 mvn clean install 的情况下运行该项目，并且我运行了 mvn exec:java。然后导致错误，因为它找不到依赖项。
这是我的 pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>martacus.mart.bot</groupId>
<artifactId>Discordbot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<repositories>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
<repository>
<id>bintray-thejavanerd-maven</id>
<name>bintray</name>
<url>https://jcenter.bintray.com</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>com.github.austinv11</groupId>
<artifactId>Discord4j</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>net.dean.jraw</groupId>
<artifactId>JRAW</artifactId>
<version>0.8.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<dependency>
<groupId>com.mashape.unirest</groupId>
<artifactId>unirest-java</artifactId>
<version>1.4.8</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<configuration>
<mainClass>martacus.mart.bot.Main</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>
当我运行“mvn -version”时，我得到:
Apache Maven 3.3.3
Maven home: /usr/share/maven
Java version: 1.8.0_66-internal, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-8-openjdk-amd64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.2.0-30-generic", arch: "amd64", family: "unix"
当我运行“java -version”时，我得到:
openjdk version "1.8.0_66-internal"
OpenJDK Runtime Environment (build 1.8.0_66-internal-b17)
OpenJDK 64-Bit Server VM (build 25.66-b17, mixed mode)
当我在谷歌上搜索时，人们告诉我这与我的代理设置有关。但是我使用的是 vps，公司无法给我代理设置。也许如果有办法找出它们是什么，它可能会解决问题，但我还没有找到获得这些设置的方法。
如果您想在 github 上查看我的 repo 以获取有关该项目的更多信息:https://github.com/Martacus/DiscordBot
一切都在我的普通电脑上运行，但当然一切的设置都不同，我使用的是 Windows 8。我希望人们能帮助我，如果你需要更多信息，请务必告诉我!