Post请求报错405

今天在学习尚硅谷的javaweb课中，在进行RegistServlet类的编写时，form表单中method="post"类中重写的方法为doPost，和视频上的代码一模一样，可还是报错405，如图所示。

package com.atguigu.web;import com.atguigu.pojo.User;
import com.atguigu.service.UserService;
import com.atguigu.service.impl.UserServiceImpl;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;public class RegistServlet extends HttpServlet {private UserService userService = new UserServiceImpl();@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {//  1、获取请求的参数String username = req.getParameter("username");String password = req.getParameter("password");String email = req.getParameter("email");String code = req.getParameter("code");//        2、检查 验证码是否正确  === 写死,要求验证码为:abcdeif ("abcde".equalsIgnoreCase(code)) {
//        3、检查 用户名是否可用if (userService.existsUsername(username)) {System.out.println("用户名[" + username + "]已存在!");
//        跳回注册页面req.getRequestDispatcher("/pages/user/regist.html").forward(req, resp);} else {//      可用
//                调用Sservice保存到数据库userService.registUser(new User(null, username, password, email));
//
//        跳到注册成功页面 regist_success.htmlreq.getRequestDispatcher("/pages/user/regist_success.html").forward(req, resp);}} else {System.out.println("验证码[" + code + "]错误");req.getRequestDispatcher("/pages/user/regist.html").forward(req, resp);}}
}

报错为：