maven 多mirror配置

    <mirror>
        <id>aliyun</id>
        <!--<mirrorOf>central</mirrorOf>-->
        <mirrorOf>!fireNexus,external:*</mirrorOf>
        <name>aliyun</name>
        <url>http://maven.aliyun.com/nexus/content/groups/public</url>
    </mirror>
    
    <mirror>
        <id>fireNexus</id>
        <mirrorOf>!aliyun,central</mirrorOf>
        <name>fireNexus</name>
        <url>http://nexus.cccc.com/repository/maven-public/</url>
    </mirror>