1. 目录结构

在这里插入图片描述

2. 创建项目

idea创建maven项目并且添加web支持

3. 导入依赖

<dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-context</artifactId>
   <version>${spring.version}</version>
 </dependency>

 <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-web</artifactId>
   <version>${spring.version}</version>
 </dependency>

 <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-webmvc</artifactId>
   <version>${spring.version}</version>
 </dependency>

 <dependency>
   <groupId>javax.servlet</groupId>
   <artifactId>servlet-api</artifactId>
   <version>2.5</version>
   <scope>provided</scope>
 </dependency>

 <dependency>
   <groupId>javax.servlet.jsp</groupId>
   <artifactId>jsp-api</artifactId>
   <version>2.0</version>
   <scope>provided</scope>
 </dependency>

4. web.xml配置

<?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_4_0.xsd"
        version="4.0">
   <!--配置中间处理器-->
   <servlet>
       <servlet-name>dispatcherServlet</servlet-name>
       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       <init-param>
           <param-name>contextConfigLocation</param-name>
           <!--springmvc配置文件路径-->
           <param-value>classpath:springmvc-servlet.xml</param-value>
       </init-param>
       <!--启动级别-->
       <load-on-startup>1</load-on-startup>
   </servlet>
   <!--匹配所有的请求，不包括jsp -->
   <servlet-mapping>
       <servlet-name>dispatcherServlet</servlet-name>
       <url-pattern>/</url-pattern>
   </servlet-mapping>
</web-app>

5. 配置文件

编写springmvc配置文件springmvc-servlet.xml 自定义文件名时要命名为{servlet-name}-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!--添加 处理映射器-->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
    <!--添加 处理器适配器-->
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>

    <!--配置视图解析器对象-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--配置文件所在的目录-->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!--配置文件的后缀名-->
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--Handler 第一个是访问的路径 class访问的方法-->
    <bean name="/hello" class="cn.qileyun.controller.HelloController"/>
</beans>

6. 编写控制类

package cn.qileyun.controller;


import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HelloController implements Controller {
    public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        //ModelAndView 模型和 视图
        ModelAndView modelAndView = new ModelAndView();
        //封装对象，放到ModelAndView中
        modelAndView.addObject("msg","hello");
        modelAndView.setViewName("hello");//WEB-INF/jsp/success.jsp
        return modelAndView;
    }
}

7. 创建页面

在WEB-INF下建一个jsp文件夹，在jsp文件夹下建hello.jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>${msg}</h1>
</body>
</html>