1、Eclipse集成Maven打包时报错：[ERROR] Unknown lifecycle phase "mvn". You must specify a valid lifecycle phase or a goal in the format。

使用eclipse打包项目，右击项目Run As，然后执行maven build的时候，输入mvn clean package -Dmaven.test.skip=true -P prod，或者mvn clean package -P prod的时候，会报下面的错误，如下所示： 

会报下面的错误，如下所示：

1 [WARNING] The requested profile "prod" could not be activated because it does not exist.
2 [ERROR] Unknown lifecycle phase "mvn". You must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -> [Help 1]
3 [ERROR] 
4 [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
5 [ERROR] Re-run Maven using the -X switch to enable full debug logging.
6 [ERROR] 
7 [ERROR] For more information about the errors and possible solutions, please read the following articles:
8 [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/LifecyclePhaseNotFoundException

我的原因是由于，使用Eclipse Maven插件[Run As]-[Maven build]时多输入了mvn命令 ，因为Eclipse Maven插件已经帮你加上了mvn的命令前缀，再手动输出mvn clean install之类的，命令就会变成mvn mvn clean install。