I just downloaded the Springsource Tool Suite, and I created a simple bean configuration file called myDefinition.xml and placed it in the root directory of the Spring Project.
There currently (as of 2012-04-10) seem to be problems with the Spring Explorer view when using a purely annotation driven bean definition (i.e. using Java annotations to wire everything up instead of using XML files).
There is a workaround though, by providing a minimum XML file that declares scanning for components. http://forum.springsource.org/showthread.php?118928-Spring-Explorer-with-Java-based-Web-Container-configuration
Unfortunately, this procedure is still flawed, missing some components.
In the Spring Explorer tab in Eclipse, right click on your project > properties. Then go to Spring > Beans Support and select the Config Files tab. You can then select files or scan a directory and that should add them. I haven't found a way to autoscan a directory so I don't have to do this whenever I add a new spring bean file. The beans that appear in that list are stored in the .springbeans file.
Just want to add that if you want to generate a diagram of a webflow of an existing project, you have to right-click said project in Eclipses Project Explorer and "Add Spring Project Nature" by using the Spring Tools entry of the context menu.
Just to add Claudio030
Make sure you have JEE perspective selected for your project, otherwise it won't show in Java perspective.