maven--Cannot complete the install because one or more required items could not be found

今天在Eclipse上安装maven插件时遇到了如下的错误：
Cannot complete the install because one or more required items could not be found.
Software being installed: Maven Integration for Eclipse (Required) 0.12.1.20110112-1712 (org.maven.ide.eclipse.feature.feature.group 0.12.1.20110112-1712)
Missing requirement: Maven Integration for Eclipse (Editors) 0.12.1.20110112-1712 (org.maven.ide.eclipse.editor 0.12.1.20110112-1712) requires 'bundle org.eclipse.zest.core 0.0.0' but it could not be found
Cannot satisfy dependency:
From: Maven Integration for Eclipse (Required) 0.12.1.20110112-1712 (org.maven.ide.eclipse.feature.feature.group 0.12.1.20110112-1712)
To: org.maven.ide.eclipse.editor [0.12.1.20110112-1712]

感觉上是少maven依赖的eclipse插件，网上查了查，解决方法如下：

启动eclipse，点击window——>preferences——>install/update——>available software sites，点击Add
添加如下信息：
GEF http://download.eclipse.org/tools/gef/updates/releases/
然后再重新安装maven插件