SpringMVC 原理

1.原理图（实现代表自动装配完成，虚线我们需要实现的地方）

 

 

 2.实现步骤

 

 3.实现

 

 HelloController.java

package com.zxy.contorller;

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 mv = new ModelAndView();

        String result = "123456";

        mv.addObject("msg",result);

        mv.setViewName("test");
        return mv;
    }
}

 

 spring配置

<?xml version="1.0" encoding="UTF8"?>
<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-3.2.xsd">

        <!--1.配置处理器映射器-->
        <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
        <!-- 2.处理器适配器   -->
        <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>
        <!-- 3. 视图解析器      -->
        <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>

        <bean id="/hello" class="com.zxy.contorller.HelloController"/>
</beans>

 

 web,xml配置 （配置springMVC的核心  DIspatcherServlet ）

<?xml version="1.0" encoding="UTF8"?>
<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">
    <!--  注册一个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： servlet-name -servlet.xml      -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc-servlet.xml</param-value>
        </init-param>
        <!--  启动级别      -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!-- springMVC中
       /:  只匹配所有的请求，不会去匹配jsp页面
       /*:  会匹配所有的页面，包括jsp
       -->
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

 

 test.jsp

<%--
  Created by IntelliJ IDEA.
  User: zxy
  Date: 2022/11/5
  Time: 15:43
  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>

 

posted @ 2022-11-05 16:27  西东怪  阅读(15)  评论(0)  编辑  收藏  举报
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