C:\WTK22\apps\WeatherServlet\src\WeatherServlet.java:9: cannot resolve symbol
symbol: class HttpServlet
location: class WeatherServlet
public class WeatherServlet extends HttpServlet {
^
C:\WTK22\apps\WeatherServlet\src\WeatherServlet.java:12: cannot resolve symbol
symbol: class HttpServletRequest
location: class WeatherServlet
public void doGet(HttpServletRequest request,
^
C:\WTK22\apps\WeatherServlet\src\WeatherServlet.java:13: cannot resolve symbol
symbol: class HttpServletResponse
location: class WeatherServlet
cannot resolve symbol
symbol: class ServletException
location: class WeatherServlet
throw new ServletException("SQL call failed"
;
C:\WTK22\apps\WeatherServlet\src\WeatherServlet.java:55: cannot resolve symbol
symbol: class ServletException
location: class WeatherServlet
throw new ServletException(e.getMessage());
是什么原因???/