Generate Eclipse project workspace settings from Maven and then load them from Eclipse. This approach is less integrated to the IDE and is one directional. To add a new dependency to your project, add it to the POM and then regenerate/load.
From the command line or as an Eclipse external tool:
mvn eclipse:eclipse
Active IDE Integration
Install the m2eclipse Eclipse plugin that will add Maven support to an Eclipse project. Keeps the POM updated automatically when dependencies are modified.
http://m2eclipse.codehaus.org
