maven build 问题

Question

mvn -e build
+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Invalid task 'build': you must specify a valid lifecycle phase, or a goal
 in the format plugin:goal or pluginGroupId:pluginArtifactId:pluginVersion:goal
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.BuildFailureException: Invalid task 'build': you must specify a
 valid lifecycle phase, or a goal in the format plugin:goal or pluginGroupId:plu
ginArtifactId:pluginVersion:goal
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor
(DefaultLifecycleExecutor.java:1830)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.segmentTaskListBy
AggregationNeeds(DefaultLifecycleExecutor.java:462)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLi
fecycleExecutor.java:175)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
        at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:6
0)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
[INFO] ------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Tue Jul 06 19:38:24 CST 2010
[INFO] Final Memory: 1M/4M
[INFO] ------------------------------------------------------------------------

Answer 1

贴出来看看啊
没有<build>?

Answer 2

<build>
<finalName>you proj name</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<version>2.0.2</version>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
</plugins>
</build>
加到</project>之前

Answer 3

mvn compile
mvn clean
mvn test
mvn site
mvn package
mvn deploy
mvn install
mvn verify
mvn validate
mvn tomcat:run
...

Answer 4

mvn compile
mvn clean这个好像反了吧

Answer 5

我也不知道问题所在了。lz自己研究下吧。好了把解决办法贴出来，给后人参考。祝lz早日解决问题。

Answer 6

哪儿来的build目标啊？用mvn，都是用mvn package，mvn install。莫非是楼主自己写的mvn，可以支持mvn build?