springMVC-HelloSpringMVC

1 引入依赖

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.2.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
</dependency>

2 在IDEA项目发布中,添加lib依赖

2.1 点击File下的Project Structure

2.2 点击Artifacts后选中要使用的项目

2.3 在WEB-INF目录下新建一个lib文件夹

2.4 选中新建好lib文件夹,点击上面的加号

2.5 点击Library Files

2.6 选中所有的jar包后点击OK

2.7 再点击OK

2.8 最后在out目录下找到自己创建的lib文件,确认jar包都已经添加成功

3 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">
    <!--配置DispatchServlet:这个是SpringMVC的核心:请求分发器/前端控制器-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--DispatchServlet要绑定Spring的配置文件-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc-servlet.xml</param-value>
        </init-param>
        <!--启动级别:1-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!--在springMVC中:/只匹配所有的请求,不会匹配jsp页面./*匹配所有的请求,包括jsp页面-->
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

4 编写springMVC的配置文件

<?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.xsd">
    <!--处理器映射器-->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
    <!--处理器适配器-->
    <bean class="org.springframework.beans.factory.xml.SimpleConstructorNamespaceHandler"/>
    <!--视图解析器 : 模板引擎 Thymeleaf Freemarker...-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">
        <!--前缀-->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!--后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

5 编写操作业务的controller类

package com.lv.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 httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        ModelAndView modelAndView = new ModelAndView();
        //业务代码
        String result = "HelloSpringMVC";
        modelAndView.addObject("message",result);
        //视图跳转
        modelAndView.setViewName("test");
        return modelAndView;
    }
}

6 在springMVC配置文件中注册controller类

<!--BeanNameUrlHandlerMapping:bean-->
<bean id="/hello" class="com.lv.controller.HelloController"/>

7 编写跳转的jsp页面

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

8 配置Tomcat 启动测试

posted @ 2022-01-21 13:16  从0开始丿  阅读(57)  评论(0)    收藏  举报