最終發現是倉庫問題,在/.m2/settings.xml裏面加入紅色一行:
<mirror>
<id>alimaven</id>
<mirrorOf>*</mirrorOf>
<name>aliyun maven</name>
<!-- <url>http://maven.oschina.net/content/groups/public/</url> -->
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<mirrorOf>central</mirrorOf>
</mirror>