When moving a legacy project from Ant to Maven, I needed to change the default source (default: src/[main|test]/java) and resources (default: src/[main|test]/resources) directories in Maven. These settings may be configured in the <build> element of the project’s pom.xml.

• <sourceDirectory> the directory where the sources of your application are stored
• <testSourceDirectory> the directory where the sources of your test cases are stored
• <resources> the resources of your main application
• <testResources> the resources needed only by your test cases

The relevant part of the pom.xml in Maven 2.1.x and above looks like this (with default values):

<project>
  <!--[...]-->
  <build>
    <sourceDirectory>${project.basedir}/src/main/java</sourceDirect
    <testSourceDirectory>${project.basedir}/src/test/java</testSourceDirectory>    
    <resources>
      <resource>
        <directory>${project.basedir}/src/main/resources</directory>
      </resource>
    </resources>
    <testResources>
      <testResource>
        <directory>${project.basedir}/src/test/resources</directory>
      </testResource>
    </testResources>
    <!--[...]-->
  </build>
  <!--[...]-->
</project>

Links

• maven project site Introduction to the POM