问题描述
D:JavaHello-world>mvn clean compile[INFO] Scanning for projects...[INFO][INFO] ------------------------------------------------------------------------[INFO] Building Maven Hello world Project 1.0-SNAPSHOT[INFO] ------------------------------------------------------------------------Downloading: http://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.4.1/maven-clean-plugin-2.4.1.pom[INFO] ------------------------------------------------------------------------[INFO] BUILD FAILURE[INFO] ------------------------------------------------------------------------[INFO] Total time: 44.022s[INFO] Finished at: Thu Jan 16 15:01:42 CST 2014[INFO] Final Memory: 2M/127M[INFO] ------------------------------------------------------------------------[ERROR] Plugin org.apache.maven.plugins:maven-clean-plugin:2.4.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1: Could not transfer artifact org.apache.maven.plugins:maven-clean-plugin:pom:2.4.1 from/to central (http://repo.maven.apache.org/maven2): Connection to http://repo.maven.apache.org refused: Connection timed out: connect -> [Help 1][ERROR][ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.[ERROR] Re-run Maven using the -X switch to enable full debug logging.[ERROR][ERROR] For more information about the errors and possible solutions, please read the following articles:[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException
解决方案
是不是用代理上网的啊，如果是，在maven目录下找到setting.xml增加代理设置
解决方案二：
http://www.kaifazhe.me/maven/217.html可以更换下镜像地址.
解决方案三：
网络问题，那个主仓库访问慢。解决办法是访问Maven仓库的国内Mirror吧http://maven.oschina.net/help.html
解决方案四：
运行 mvn clean, 需要 maven-clean-plugin:2.4.1。你本地没有这个jar，maven就自动到http://repo.maven.apache.org/maven2/... 那里去拿。你网络又有问题，连不上http://repo.maven.apache.org/maven2/... ， Maven就怒了，吐你一串Error。
解决方案五：
Connection to http://repo.maven.apache.org refused: Co nnection timed out: connect -> 看错误信息可能是网络连接问题，第一步检查网络连接。如果网络连接没有问题第二步：使用mvn clean compile -X 将详细的信息显示出来针对详细信息在分析原因。可以参考：http://stackoverflow.com/questions/16663331/maven-building-errorps:如有兴趣可以关注一下微信公众账号：ahhqcheng 会定期分享一下编程的问题及解决方法。
解决方案六：
1.检查pom文件有没有红叉2.检查连的仓库里是不是有你需要的jar包