Http ошибка 404 ресурс не найден в Spring mvc

Когда я проверил, этот код работает:

Web.xml:

<?xml version = "1.0" encoding = "UTF-8"?>
<web-app xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
xmlns = "http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation = "http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id = "WebApp_ID" version = "3.0">
<display-name>ValidationForm</display-name>


<servlet>
    <servlet-name>spring-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>

</servlet>
<servlet-mapping>
    <servlet-name>spring-dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

Spring-servlet.xml

<?xml version = "1.0" encoding = "UTF-8"?>
<beans:beans xmlns = "http://www.springframework.org/schema/mvc"
xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" 
xmlns:beans = "http://www.springframework.org/schema/beans"
xmlns:context = "http://www.springframework.org/schema/context"
xsi:schemaLocation = "http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc.xsd
    http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context.xsd">

<annotation-driven />
<context:component-scan base-package = "com.demo.spring" />
<beans:bean
    class = "org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name = "prefix" value = "/WEB-INF/views/" />
    <beans:property name = "suffix" value = ".jsp" />
</beans:bean>

HomeController:

package com.demo.spring.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class HomeController {
@RequestMapping(value = "/", method = RequestMethod.GET)
public ModelAndView welcome() {
    return new ModelAndView("welcome");
}

@RequestMapping(value = "demo1/wel", method = RequestMethod.POST)
public ModelAndView hello(HttpServletRequest req, HttpServletResponse res) {

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

    if (name.equals("mohit") && pass.equals("admin")) {
        String messege = "Welcome" + name;

        return new ModelAndView("welcome", "message", messege);
    } else {
        return new ModelAndView("errorpage", "message", "Authantication Failed");
    }
    }
}

Попробуйте использовать это

You need to configure your view resolver.

1. first create spring-dispatcher.xml file.
2. Add view resolver configuration in your xml file.
    <beans:property name = "prefix" value = "/WEB-INF/views/" />
    <beans:property name = "suffix" value = ".jsp" />
3. place jsp file in views folder under webapp--> WEB-INF.
4. Now view resolver will find jsp at this path  " /WEB-INF/views/yoursjspname.jsp ".