java getmethod() 问题求解

package demo;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**

• 最简单的Servlet

• @author Winter Lau
  */
  public class HelloServlet extends HttpServlet {

  @Override
  protected void service(HttpServletRequest req, HttpServletResponse res)
  throws ServletException, IOException {
  // res.getWriter().println("Hello World!");
  String methodname = req.getParameter("method").toString();
  System.out.println(methodname+",,,,"+req.getClass());
  Method method = null;
  try {
  method = this.getClass().getMethod(methodname,new Class[]{req.getClass(),res.getClass()});
  } catch (NoSuchMethodException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  } catch (SecurityException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  }
  try {
  method.invoke(this,req, res);
  } catch (IllegalAccessException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  } catch (IllegalArgumentException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  } catch (InvocationTargetException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  }
  }

  public void robotpage(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException{
  String url="/jsp/robot/robot.jsp";
  ServletContext sc = getServletContext();
  
  RequestDispatcher rd = sc.getRequestDispatcher(url);
  
  rd.forward(req, res);
  }

}

程序运行时method = this.getClass().getMethod(methodname,new Class[]{req.getClass会报错java.lang.NoSuchMethodException: demo.HelloServlet.robotpage(org.apache.catalina.connector.RequestFacade, org.apache.catalina.connector.ResponseFacade)
at java.lang.Class.getMethod(Unknown Source)

反射的时候没有找到类，检查下你的配置文件

rebotpage()方法参数类型不匹配吧，所以说没有找到rebotpage()