Question

我想实现一个servlet并在WebApp中调用它。

我经常从Apache Tomcat Server获得java.lang.ClassCastException: Servlet.Telnet cannot be cast to javax.servlet.Servlet。我确保我的课程延伸HttpServlet这是我的代码：

package Servlet;

import java.io.IOException;
import java.io.PrintStream;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.net.telnet.TelnetClient;




public class Servlet extends HttpServlet {


    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
             TelnetClient telnet = new TelnetClient();
             telnet.connect(request.getParameter("router"), 23);
             PrintStream output = new PrintStream(telnet.getOutputStream());
             output.println(request.getParameter("login"));
             output.flush();
             output.println(request.getParameter("password"));
             output.flush();
             out.printf("SUCCESS");



             telnet.disconnect();




        } catch (Exception e) {
            e.printStackTrace();
            out.printf("ERROR");

        }
    }

Answer 1

我重命名了包和类，它完美无缺。

java.lang.ClassCastException：无法将Servlet.Telnet强制转换为javax.servlet.Servlet

1 个答案: