maven:cmd中运行mvn 报错？

[lzg734643798]

C:\Users\Administrator>mvn
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.287s
[INFO] Finished at: Tue Sep 17 15:31:47 CST 2013
[INFO] Final Memory: 2M/15M
[INFO] ------------------------------------------------------------------------
[ERROR] No goals have been specified for this build. You must specify a valid li
fecycle 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, p
rocess-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-site, site, post-site,
 site-deploy, pre-clean, clean, post-clean. -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit
ch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/NoGoalSpecifie
dException

[lzg734643798]

M2_HOME 和path中都配置了

[无聊找乐]

You must specify a valid li fecycle phase or a goal in the format <plugin-prefix>:<goal> or <plugin-group-id >:<plugin-artifact-id>[:<plugin-version>]:<goal>. 要指定一个生命期phase 或者插件机器goal 你用 mvn clean complie 执行就好了

[无聊找乐]

maven 生命期参考 http://maven.apache.org/guides/introduction/introduction-to-the-lifecycle.html#Lifecycle_Reference