Maven cannot rely on a JAR file solution

Problem Description:

Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not being resolved:failed to read AR Tifact 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): * INSERT proxy here*: Unknown host *insert proxy here*

Solution:

Open a Apache-maven-3.2.3\conf\settings.xml file to add the following

<mirror>
<id>ibiblio.org</id>
<name>ibiblio Mirror of Http://repo1.maven.org/maven2/</name>
<url>http://mirrors.ibiblio.org/pub/mirrors/maven2</url>
<mirrorOf>central</mirrorOf>
<!--states, North Carolina--
</mirror>
<mirror>
<id>jboss-public-repository-group</id>
<mirrorOf>central</mirrorOf>
<name>jboss Public Repository group</name>
<url>http://repository.jboss.org/nexus/content/groups/public</url>
</mirror>

Maven cannot rely on a JAR file solution