1. I work on ubuntu 12.04 and my friend works on win7.
2. It is java project based on maven.
3. We both use eclipse with UTF-8
I archieve my project to project.zip, and send it with email.
1. `mvn jetty:run` works fun for him.
2. `mvn jetty:run` not works after `mvn clean`.
[error: package com.myproject.xxxx not exist]
So, what cause the problem?