Could not resolve archetype org.apache.maven.archetypes:maven-archetype-webapp:RELEASE from any of the configured repositories.

修改settings.xml:

    <mirror>
        <id>nexus-osc</id>
        <mirrorOf>*</mirrorOf>
        <name>Nexus osc</name>
        <url>http://maven.oschina.net/content/groups/public/</url>
    </mirror>  

两份settings.xml,一份在maven安装目录C:\Program Files\Java\apache-maven-3.3.9\conf下，一份从这里拷贝到C:\Program Files\Java\maven-repository下。