src/main/webapp/WEB-INF/web.xml

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<?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"
         version="3.0">
  <!-- 地址为http://localhost:8080/  显示的默认网页-->
  <welcome-file-list>
    <welcome-file>/WEB-INF/views/login.jsp</welcome-file>
  </welcome-file-list>

  <!--加载Spring的配置文件到上下文中去-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
      classpath:META-INF/applicationContext.xml
    </param-value>
  </context-param>

  <!-- spring MVC config start-->
  <servlet>
    <servlet-name>spring</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <!-- 此处指向的的是SpringMVC的配置文件 -->
      <param-value>classpath:META-INF/spring-mvc.xml</param-value>
    </init-param>
    <!--配置容器在启动的时候就加载这个servlet并实例化-->
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <!-- spring MVC config end-->


  <!-- Spring监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!--  字符集过滤  -->
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>