failure to transfer org.codehaus.plexus:plexus:pom:2.0.5 from http://
repo.maven.apache.org/maven2 was cached in the local repository, resolution will not
be reattempted until the update interval of central has elapsed or updates are forced.
Original error: Could not transfer artifact org.codehaus.plexus:plexus:pom:2.0.5 from/
to central (http://repo.maven.apache.org/maven2): connection timed out to http://
repo.maven.apache.org/maven2/org/codehaus/plexus/plexus/2.0.5/plexus-2.0.5.pom
查看本地库该文件夹：少了jar等东西
于是本地安装，到http://mvnrepository.com/输入plexus搜索
然后在cmd中手动安装：
D:\repository\org\codehaus\plexus\plexus\2.0.5
Maven安装JAR包命令是：
mvn install：install-file -Dfile=jar包的位置 -Dgroup=上面的groupId -DartifactId=上面的artifactId -Dversion=上面的version -Dpackaging=jar
注意：1.-Dfile=jar包的位置 需要将jar包也写上
2.jar包不能放在要库里面
然后看D:\repository\org\codehaus\plexus\plexus\2.0.5