Comments on: 3 ways to run Java main from Maven

By: vineet

vineet — Thu, 02 Feb 2012 20:38:02 +0000

Looks right to me.

I would try the following:
1) Try mvn -X to generate more debug info.
2) Also try the other approach as described in section 2) above: “Running in a phase in pom.xml”, see if that works.

By: Tensy

Tensy — Thu, 02 Feb 2012 19:29:53 +0000

Hi Vineet, This post is really useful.
However, when I try to run the command, I see the following.
Command: mvn org.codehaus.mojo:exec-maven-plugin:1.2:java -e -Dexec.mainClass=com.myclass.Wsdl2XsdConverter

An exception occured while executing the Java class. com.myclass.Wsdl2XsdConverter
INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: An exception occured while executing the Java class. com.myclass.Wsdl2XsdConverter
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:703)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:553)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:523)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:371)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:332)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:181)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:356)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:137)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:356)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
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)
Caused by: org.apache.maven.plugin.MojoExecutionException: An exception occured while executing the Java class. com.qpass.googlecarrierbilling.Wsdl2XsdConverter
at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:346)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:483)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:678)
… 16 more
Caused by: java.lang.ClassNotFoundException: com.myclass.Wsdl2XsdConverter
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:284)
at java.lang.Thread.run(Thread.java:595)

I run the mvn compile command also prior to running the above mentioned mvn command.
Any help is greatly appreciated.

By: Anil Kesariya

Anil Kesariya — Thu, 02 Feb 2012 05:42:03 +0000

hello i m anil

i m first time working with maven.. so i dont that how should we work with it , i got lession that how we can generate jar file from our java file using maven
so please tell me that how should i work with it..i have only one day dead line..

By: Akilan

Akilan — Wed, 30 Nov 2011 14:37:43 +0000

Thanks Vineet. Wonderful blog and exactly what I searched for.

By: Terence

Terence — Fri, 04 Nov 2011 03:46:31 +0000

Thanks. Combined with your post and the maven doco, it took me about 10 minutes to have it working and documented.

By: Finn

Finn — Wed, 27 Apr 2011 10:26:27 +0000

Highest quality blog post ever, exactly what I needed. Thank you.

By: Max Mohave

Max Mohave — Fri, 18 Mar 2011 22:55:23 +0000

Thank you. I appreciate your skill and time.
Sincerely, Max

By: vineet

vineet — Fri, 18 Mar 2011 20:22:42 +0000

I use Eclipse. I first run “mvn eclipse:eclipse” to export the project into eclipse format. Then import the project by using File -> Import -> Import existing project.

However, I use mvn from command line and not from inside the IDE.

There are eclipse plugins for maven (like m2eclipse) that you can use from inside Eclipse but I don’t use them.

By: Max Mohave

Max Mohave — Fri, 18 Mar 2011 02:59:44 +0000

Dear Vineet:

thank, I used your info to run my new application by MVN command line. Do you use an IDE with MAVEN to run and if so which one. And lastly, can you tell me how you would use the equivalent of mvn org.codehaus.mojo:exec-maven-plugin:1.1.1:java -Dexec.mainClass=com.vineetmanohar.module.Main

to run in that IDE?

Thanks so much.

By: norman rm

norman rm — Tue, 15 Mar 2011 22:57:48 +0000

thanks