解决办法：maven的配置文件settings.xml中添加mirror地址
<mirror> <id>alimaven</id> <name>aliyun maven</name> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <mirrorOf>central</mirrorOf> </mirror>
Failed to transfer file: http://repo.maven.apache.org/maven2/xpp3/xpp3_min/1.1.4c/xpp3_min-1.1.4c.jar
原文：https://www.cnblogs.com/xiaoliangup/p/10462359.html
