一、卸載原有maven插件
MyEclipse 6.5集成了Maven插件，不過有不少bug，用習慣了m2eclipse，不想在這上面浪費時間。要安裝m2eclipse，需要先把自帶的maven插件卸載掉，卸載步驟如下：
1.刪除/eclipse/features/com.genuitec.myeclipse.maven_6.5.1.zmyeclipse650200806目錄
2.進入plugins目錄，刪除以下目錄及jar包
1 com.genuitec.myeclipse.maven_6.5.1.zmyeclipse650200806
2 org.maven.ide.components.archetype_common_2.0.0.20080331-1600
3 org.maven.ide.components.maven_embedder_2.1.0.20080410-2200
4 org.maven.ide.components.maven_model_edit_1.0.0.20080331-1600
5 org.maven.ide.components.maven_scm_1.0.0.20080410-2200
6 org.maven.ide.components.nexus_indexer_1.0.0.20080331-1600
7 org.maven.ide.components.qname_1.0.0.20080331-1600
8 com.genuitec.eclipse.maven_6.5.1.zmyeclipse650200806.jar
9 org.maven.ide.eclipse.central_0.9.1.zmyeclipse650200806.jar
10 org.maven.ide.eclipse.scm_0.9.2.zmyeclipse650200806.jar
11 org.maven.ide.eclipse_0.9.3.zmyeclipse650200806.jar
二、在線安裝m2eclipse
1.Help -> Find and Install ->Search for new features to install->New Remote Site
1 name：m2eclipse
2 url：http://m2eclipse.sonatype.org/sites/m2e/0.10.0.20100209-0800/
2.點擊Finish，開始自動搜索。這個鏈接之前是好用的，不過今天再下載總是提示錯誤，直接訪問也提示內容找不到，看來是挪地方了。最后在官網找到這個帖子
Where did http://m2eclipse.sonatype.org/sites/m2e go?根據提示找到了最新地址
http://repository.sonatype.org/content/sites/forge-sites/m2e/帖子內容
As of June 2013, that site has been shut down because M2Eclipse was moved to the Eclipse Foundation years ago.
You can access the archived M2Eclipse sites (including 0.12) here:
https://repository.sonatype.org/content/sites/forge-sites/m2e/
For more information on how to access current m2e releases, see http://eclipse.org/m2e/download/.
所以上面的地址變成了這樣
1 name:m2eclipse
2 url:http://repository.sonatype.org/content/sites/forge-sites/m2e/0.10.0/S/20100209-0800/
再安裝就沒有問題了。
3.設置maven
Window->preferences，搜索maven，User Settings中選擇本地maven配置文件，Update Settings->Apply->OK
三、問題
重啟MyEclipse后，跳出異常
1 Eclipse is running in a JRE, but a JDK is required
2 Some Maven plugins may not work when importing projects or updating source folders.
具體的解決方案見這個鏈接
http://www.tkk7.com/itvincent/archive/2010/07/25/327101.html