Could not calculate build plan: Plugin org.apache.maven.plugins:maven-war-plugin:2.2 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-war-plugin:jar:2.2
Plugin org.apache.maven.plugins:maven-war-plugin:2.2 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-war-plugin:jar:2.2

解决办法：

1.删除你的仓库
（默认为：C:\Users\用户名.m2\repository\org\apache\maven\plugins\maven-war-plugin\2.2)目录下的m2e-lastUpdated.properties文件

2.项目右键，Run As–>Maven clean
3.项目右键，Run As–>Maven install
4.项目右键，Maven–>Update Project