【springMVC】使用maven时，已经添加了spring-web和spring-webmvc依赖，却没有注解，还有其他报错

原因是web.xml里没有添加监听配置，添加上即可

    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>

或者改成这样

<web-app xmlns="http://java.sun.com/xml/ns/javaee"  
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"  
      version="3.0">  
    <servlet>  
        <servlet-name>spring-mvc</servlet-name>  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
    </servlet>  
  
    <servlet-mapping>  
        <servlet-name>spring-mvc</servlet-name>  
        <url-pattern>/</url-pattern>  
    </servlet-mapping>  
</web-app>