SpringMVC开端

最新推荐文章于 2025-12-08 09:18:56 发布

原创最新推荐文章于 2025-12-08 09:18:56 发布 · 226 阅读

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为什么要学习SpringMVC

轻量级，简单易学
高效，基于请求响应的MVC框架
与Spring兼容性好，无缝结合
约定优于配置
功能强大：RESTful，数据验证，格式化，本地化，主题等
简单灵活

创建MVC项目

新建一个Module，添加web支持！
导入SpringMVC依赖
配置web.xml注册DispatcherServlet

<?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">
        <!--1.注册DispatcherServlet-->
        <servlet>
            <servlet-name>springmvc</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <!--关联一个springmvc的配置文件-->
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:springmvc-servlet.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
        </servlet>
        <!-- /：匹配所有的请求，不包括.jsp-->
        <!--/*:匹配所有的请求，包括.jsp-->
        <servlet-mapping>
            <servlet-name>springmvc</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
</web-app>

编写springmvc-servlet.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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-4.2.xsd">


    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>

    <!-- 视图层配置 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <bean id="/hello" class="com.yf.controller.HelloController"/>
</beans>

编写controller层

package com.yf.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 {
    @Override
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        //模型和视图 ModelAndView
        ModelAndView mv = new ModelAndView();

        //封装对象，放在ModerAndView中。Model
        mv.addObject("msg","HelloSpringMVC!");
        //封装要跳转的视图，放在ModerAndView中
        mv.setViewName("hello");
        //:/WEB-INF/jsp/hello.jsp
        return mv;
    }
}

编写jsp页面

<%--
  Created by IntelliJ IDEA.
  User: Lenovo
  Date: 2022/3/30
  Time: 21:09
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
${msg}
</body>
</html>

开始测试！