在没有执行“mvn install”的情况下在reactor项目中运行Maven目标

Question

I'm trying to execute a Java file in a subproject in a maven reactor project. This is similar to the question Maven exec:java goal on a multi-module project , but unless I do a mvn install then the exec plugin can't find the class that I'm trying to run in the subproject.

Perhaps I misunderstand the intended workflow of mvn install , but having to do mvn install every time I make changes really complicates the workflow.

When I execute the file from Eclipse, Eclipse sets up the classpath correctly (ie module1/target/classes , module2/target/classes ) and I want to emulate this behaviour from the command line. I thought doing mvn -pl exec:java -Dexec.mainClass=... would set up the classpath in this way, but the class is not found in this case.

Answer 1

The classpath isn't the problem in that case. But you have to compile your classes (eg at least run mvn compile). If you run your application within Eclipse, Eclipse will do the compile work, on the commandline you have to explicitly call that command.