idea导入maven项目，出现以下错误：
[ERROR] Plugin org.apache.maven.plugins:maven-clean-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.5: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.5 from/to central (https://repo.maven.apache.org/maven2): Received fatal alert: protocol_version -> [Help 1]
解决方法：
1、修改maven的settting.xml，添加私服镜像
2、idea配置setting.xml目录
重新操作maven，clean，compile，都可以正常使用了