i have mapped "actions" and "roles" classes using many-to-many association, with the intermediate table "roleaction". i wanted to display all the roles and actions in separate combo boxes. i did this using struts. where structs Action class gets the list of roles and actions using hibernates. this list is passed to jsp and displayed in combo box. when ever i run the jsp hibernate is deleteting all the rows of the intemediate table "roleaction".