When you have some problem for generating Web Service from Eclipse with Axis2,
you should check set up of eclipse for Axis2.
Window > Preference > Web Services > Axix2 Preferences > Axis2 Runtime
setup "Axis2 Runtime Location" from "Browse" button : setup Axis2 folder
then you will see the message on the bottom "Axis2 runtime loaded successfully!!!"
Click ok and process generating Web service again.