当监听器由自定义的换成spring-web的监听器时所有的servlet类都不能访问了

换成spring-web后的servlet类:

package com.web.servlet;

import com.service.UserService;
import com.web.listener.WebApplicationContextUtils;
import org.springframework.web.context.WebApplicationContext;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/UserServlet")
public class UserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        ServletContext sc = this.getServletContext();
        //ApplicationContext app = WebApplicationContextUtils.getWebApplicationContext(sc);
        WebApplicationContext app = (WebApplicationContext) WebApplicationContextUtils.getWebApplicationContext(sc);
        UserService userService = app.getBean(UserService.class);
        userService.save();
    }

    protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        this.doPost(req, res);
    }
}

spring-web的监听器:

```xml
<?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">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!--配置监听器-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
</web-app>

tomcat能连接成功,虚拟目录没有设置,
如果使用自定义的监听器,就没有访问不到servlet的问题

嗯···好像是猫不灵敏了，我重启了大概六七遍后发现artifacts的库忘引了，接着又重启了几遍，servlet就好了，可以监听到了