异常信息：
Cannot complete the install because one or more required items could not be found.
Software being installed: m2e - slf4j over logback logging (Optional) 1.4.0.20130601-0317
(org.eclipse.m2e.logback.feature.feature.group 1.4.0.20130601-0317)
Missing requirement: Maven Integration for Eclipse 1.4.0.20130601-0317 (org.eclipse.m2e.core.ui 1.4.0.20130601-0317)
requires 'bundle org.slf4j.api 1.6.2' but it could not be found
Cannot satisfy dependency:
From: m2e logback appender 1.4.0.20130601-0317 (org.eclipse.m2e.logback.appender 1.4.0.20130601-0317)
To: bundle org.eclipse.m2e.core.ui [1.4.0,1.5.0)
Cannot satisfy dependency:
From: m2e - slf4j over logback logging (Optional) 1.4.0.20130601-0317 (org.eclipse.m2e.logback.feature.feature.group 1.4.0.20130601-0317)
To: org.eclipse.m2e.logback.appender [1.4.0.20130601-0317]
解决办法：
1.Help->Install New Software
2.Work with填写：http://www.fuin.org/p2-repository/ ，会有一段加载时间 -> 搜索框填写slf
3.在Maven osgi-bundles下选中slf4j-api，然后next...
4.重启eclipse
5.重新安装Maven插件
PS：本文转自：http://www.devnote.cn/article/192.html，仅为记录之用。