借助它可以快速完成一个web项目。
    maven初始化一个web项目，调整web.xml .

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
    5.          version="4.0">
    6.     <context-param>
    7.         <param-name>contextConfigLocation</param-name>
    8.         <param-value>classpath:applicationContext.xml</param-value>
    9.     </context-param>
    10.     <listener>
    11.         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    12.     </listener>
    13.     <servlet>
    14.         <servlet-name>dispatcherServlet</servlet-name>
    15.         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    16.         <init-param>
    17.             <param-name>contextConfigLocation</param-name>
    18.             <param-value>classpath:applicationContext.xml</param-value>
    19.         </init-param>
    20.         <load-on-startup>1</load-on-startup>
    21.         <async-supported>true</async-supported>
    22.     </servlet>
    23.     <servlet-mapping>
    24.         <servlet-name>dispatcherServlet</servlet-name>
    25.         <url-pattern>/</url-pattern>
    26.     </servlet-mapping>
    27. </web-app>

    容器的配置文件 applicationContext.xml .

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    3.        xmlns:mvc="http://www.springframework.org/schema/mvc"
    4.        xmlns:context="http://www.springframework.org/schema/context"
    5.        xmlns="http://www.springframework.org/schema/beans"
    6.        xsi:schemaLocation="http://www.springframework.org/schema/mvc
    7. http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
    8. http://www.springframework.org/schema/context
    9. http://www.springframework.org/schema/context/spring-context-4.2.xsd
    10. http://www.springframework.org/schema/beans
    11. http://www.springframework.org/schema/beans/spring-beans-4.2.xsd ">
    12.     <context:component-scan base-package="cn.lichenghao"/>
    13.     <mvc:annotation-driven/>
    14.     <!--视图解析器-->
    15.     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    16.         <!-- 需要在WEB-INF下创建jsp文件夹存放视图 -->
    17.         <property name="prefix" value="/WEB-INF/views/"/>
    18.         <property name="suffix" value=".jsp"/>
    19.     </bean>
    20.     <mvc:default-servlet-handler/>
    21. </beans>

    新建个测试页面

    1. <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    2. <html>
    3. <head>
    4.     <title>Hello world!</title>
    5. </head>
    6. <body>
    7. Hello world!
    8. </body>
    9. </html>

    新建个页面请求

    1. package cn.lichenghao.controller;
    3. import org.springframework.stereotype.Controller;
    4. import org.springframework.web.bind.annotation.RequestMapping;
    6. @Controller
    7. public class HomeController {
    8.     @RequestMapping("/")
    9.     public String home() {
    10.         return "index";
    11.     }
    12. }

    启动访问即可。 演示项目地址：spring-framework-5.2.22.RELEASE/spring-web-lich-test .

    基于Servlet简化了复杂的操作，还记得Servlet怎么操作吗？(新建请求处理，添加请求映射，然后建很多个……) .