@WebServlet注解访问404问题

Question

问题遇到的现象和发生背景

Tomcat版本：8.0.36
web版本：3.1

问题相关代码，请勿粘贴截图

web.xml代码：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1"
         metadata-complete="false">
</web-app>

java代码：

package com.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
    @Override
    public void init() throws ServletException {
        System.out.print("开始初始化……\n");
    }
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.print("开始处理请求……\n");
    }
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.print("开始处理get请求……\n");
    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.print("开始处理post请求……\n");
    }
    @Override
    public void destroy() {
        System.out.print("销毁servlet……\n");
    }
}

运行结果及报错内容

HTTP Status 404 - /Study20220209/LoginServlet


type Status report

message /Study20220209/LoginServlet

description The requested resource is not available.


Apache Tomcat/8.0.36

尝试解决方法：

查了不少博客，基本都是要web版本3.0以上以及 metadata-complete="false"，这两项都已经满足，但是仍然404