Konvertera datumet före infogning:
String fDate = request.getParameter("fromDate");
SimpleDateFormat sm = new SimpleDateFormat("mm/dd/yyyy");
Date dat = sm.parse(fDate);
insert into tbl_room_under_maintenance(room_id,room_number,from_date,to_date)
values(?,?,?,?)
PS1.setDate(3,dat);