创建项目时报以下错误.
Could not calculate build plan: Plugin org.apache.maven.plugins:maven-war-plugin:2.1.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for ...
此问题的解决：
1、确认windows -> Preferences -> maven 的settings.xml文件中，设置代理,很多可能是你设置出现错误.
2、C:\Users\ttt\.m2\repository\org\apache\maven\plugins目录下的文件夹全部删除，重新下载。
