一、卸载原有maven插件
MyEclipse 6.5集成了Maven插件，不过有不少bug，用习惯了m2eclipse，不想在这上面浪费时间。要安装m2eclipse，需要先把自带的maven插件卸载掉，卸载步骤如下：
1.删除/eclipse/features/com.genuitec.myeclipse.maven_6.5.1.zmyeclipse650200806目录
2.进入plugins目录，删除以下目录及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
?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、在线安装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?url：http://m2eclipse.sonatype.org/sites/m2e/0.10.0.20100209-0800/
2.点击Finish，开始自动搜索。这个链接之前是好用的，不过今天再下载总是提示错误，直接访问也提示内容找不到，看来是挪地方了。最后在官网找到这个帖子Where did http://m2eclipse.sonatype.org/sites/m2e go?根据提示找到了最新地址http://repository.sonatype.org/content/sites/forge-sites/m2e/
帖子内容
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/.
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/.
所以上面的地址变成了这样
1?name:m2eclipse
2?url:http://repository.sonatype.org/content/sites/forge-sites/m2e/0.10.0/S/20100209-0800/
2?url:http://repository.sonatype.org/content/sites/forge-sites/m2e/0.10.0/S/20100209-0800/
再安装就没有问题了。
3.设置maven
Window->preferences，搜索maven，User Settings中选择本地maven配置文件，Update Settings->Apply->OK
?
三、问题
重启MyEclipse后，跳出异常
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.
2?Some?Maven?plugins?may?not?work?when?importing?projects?or?updating?source?folders.
具体的解决方案见这个链接http://www.blogjava.net/itvincent/archive/2010/07/25/327101.html