Try this stylesheet. After importing, use "Tools" -> "Fit Node to Label" (with default settings) and run "Layout" -> Hierarchical".
Note: This stylesheet models JDepend metrics as custom properties. However, yEd's "XML+XSL" import filter only supports custom properties as of version 3.12 (which is not yet released but will be soon). So, either wait for 3.12 or use ANT (or another transformer) to convert your report to GraphML and open the resulting GraphML as usual in yEd.