我不知道为什么提示出错
"BaseHttpServlet.java": Error #: 454 : class mfc.BaseHttpServlet should be declared abstract; it does not define method processRequestType(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) in class mfc.BaseHttpServlet at line 8, column 8

我的代码如下
public class BaseHttpServlet extends HttpServlet
        implements Constants{

    private static String cName="BaseHttpServlet";

    abstract public void init() throws ServletException;

    public void doGet(HttpServletRequest request,
                        HttpServletResponse response)
                        throws ServletException,IOException{
        doPost(request,response);
    }

    abstract public void doPost(HttpServletRequest request,
                                HttpServletResponse response)
                                throws ServletException,IOException;

    abstract public void processRequestType(HttpServletRequest request,
                                            HttpServletResponse response)
                                            throws ServletException,IOException;

    public void redirectToResource(HttpServletRequest request,
                                    HttpServletResponse response,
                                    String resourceName)
                                    throws ServletException,IOException{

     ....
    }
}

如果你的类里面的方法被声明成为abstract那么这个类必须被声明为abstract