...
- Step 3: You should now have all of the Jetty submodules imported into your workspace, although with compilation errors. Your Eclipse should look like:

- Step 4: The maven generated Eclipse files will reference a variable called M2_REPO. You need to define that in your workspace. To do that, select the Preferences ... menu item. Select the Java->Build Path->Classpath Variables item from the dialog. Click New and enter
M2_REPOin the Name: field. Enter or browse to the location of your local maven repository. Usually, this will be in your home directory as~/.m2/repository. Click OK. A dialog box will appear warning you that you are changing the classpath. Click on the OK button to do a full build using the new variable you have just added.Step 4: There is no step 4! You now have Jetty
You're finished, Jetty is imported into Eclipse.
You might also want to check out how to Debug Jetty with Eclipse and Debugging the Maven Jetty Plugin inside Eclipse.