在idea中jsp涉及到页面跳转就404的问题，求大佬支招！！！！

Question

psp代码：<%--
Created by IntelliJ IDEA.
User: HASEE
Date: 2019/11/24
Time: 22:22
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8"isELIgnored="false" language="java" %>

Title


${requestScope.hai} username:
password:

servlet 代码：

package cn.kgc.servlet;

import cn.kgc.entity.utils.User;
import cn.kgc.service.UserService;
import cn.kgc.service.inpl.Userservicepml;

import javax.jws.soap.SOAPBinding;
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 Loginservlet extends HttpServlet {
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//获取页面输入的用户名和密码

    String name = req.getParameter("name");
    String password = req.getParameter("password");


    //调用service中登录的方法
    UserService userService=new Userservicepml();
    User user=new User(null,"name","password");

    User login = userService.login(user);
    if (login!=null){
        //3.登录成功跳转到succcess.jsp
       // resp.sendRedirect("/success.jsp");
        req.setAttribute("name",name);
        req.getRequestDispatcher("/success.jsp");

    }else {
        //4登录失败跳转到login.jsp
       // resp.sendRedirect("/login.jsp");
        req.setAttribute("hai","用户名或密码错误");
        req.getRequestDispatcher("login.jsp").forward(req,resp);

    }









}

}
servlet 配置文件（web.xml）：

<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >

Archetype Created Web Application

Loginservlet
cn.kgc.servlet.Loginservlet

Loginservlet
/Loginservlet


loginout
cn.kgc.servlet.loginout


loginout
/loginout

Answer 1

可以用绝对路经，把上下文路经加上，比如

    String requestContextPath = ((HttpServletRequest) req).getContextPath();

     req.getRequestDispatcher(requestContextPath+"/success.jsp");