Maven使用国内镜像

<mirrors>
    <!-- mirror | Specifies a repository mirror site to use instead of a given
        repository. The repository that | this mirror serves has an ID that matches
        the mirrorOf element of this mirror. IDs are used | for inheritance and direct
        lookup purposes, and must be unique across the set of mirrors. | <mirror>
        <id>mirrorId</id> <mirrorOf>repositoryId</mirrorOf> <name>Human Readable
        Name for this Mirror.</name> <url>http://my.repository.com/repo/path</url>
        </mirror> -->
    <mirror>
        <id>aliyun</id>
        <name>aliyun Maven</name>
        <mirrorOf>*</mirrorOf>
        <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
    </mirror>
</mirrors>