用myeclipse10建立maven工程时pom.xml报错 求解~~~?报错

用MyEclipse10建立maven web工程的时候，POM.XML总是报错，错误信息如下。还请大神们帮帮忙啊~~ 小弟感激涕零！！
Multiple annotations found at this line:
- No plugin found for prefix 'war' in the current project and in the plugin groups [] available from the 
repositories [local (C:\Users\Guan Yang.m2\repository), central ( http://repo1.maven.org/maven2) ]
- Failure to transfer org.apache.maven.plugins:maven-resources-plugin:pom:2.4.3 from http://
repo1.maven.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.apache.maven.plugins:maven-resources-plugin:pom:2.4.3 from/to central ( http://repo1.maven.org/maven2):  null to 
http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-resources-plugin/2.4.3/maven-resources-
plugin-2.4.3.pom