[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]


[ERROR] Error resolving version for plugin 'org.mortbay.jetty:maven-jetty-plugin' from the repositories [local (/root/.m2/repository), central (https://repo.maven.apache.org/maven2)]: Plugin not found in any plugin repository -> [Help 1]


[ERROR] Error resolving version for plugin 'org.codehaus.mojo:tomcat-maven-plugin' from the repositories [local (/root/.m2/repository), central (https://repo.maven.apache.org/maven2)]: Plugin not found in any plugin repository -> [Help 1]


maven版本用的是3.2.5，最后发现jdk更新到1.8就好了，1.7编译就出现错误。编译之后这三个错误就全部消失。

当然这3个错误是注释掉上一条，下一条才会出现。