SpringMvc组件与注解配置

叁歲伎倆 2021-12-23 06:37 263阅读 0赞

# 一、 SpringMvc的三大组件： #

### 1、 DispatchServlet(拦截请求) ###

### 2、HandlerMapping (映射器控制器) ###

### 3、HandlerAdapter（适配器，执行方法） ###

### 4、ViewResolver（视图解析器）用于解析视图 ###

# 二、SpringMvc的容器与Spring的容器 #

SpringMvc的容器是Spring容器的子容器，因此可以在SpringMvc容器中调用Spring容器。Spring的容器与SpringMvc容器的关系：

![Spring容器与SpringMvc容器的关系][Spring_SpringMvc]

# 三、web.xml文件的配置 #

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
      <servlet>
      
      	<servlet-name>springmvc</servlet-name>
      	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      	
      	<init-param>
      		<param-name>contextConfigLocation</param-name>
      		<param-value>classpath:springmvc.xml</param-value>
      	</init-param>
      	<load-on-startup>1</load-on-startup>
      </servlet>
      <servlet-mapping>
      	<servlet-name>springmvc</servlet-name>
      	<url-pattern>/</url-pattern>
      </servlet-mapping>
    </web-app>

# 四、配置springMvc.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"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd
             http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd">
          
            <context:component-scan base-package="com.test.controller"></context:component-scan>
            
            <mvc:annotation-driven></mvc:annotation-driven>
           
            <mvc:resources location="/WEB-INF/image/" mapping="/image/**"></mvc:resources>
    </beans>

# 五、编写控制器类 #

package com.test.controller;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    /**
     * 用注解的形式配置mvc环境
     * @author QuLei
     *
     */
    @Controller
    public class DemoController {
    	@RequestMapping("/demo")
    	public String demo() {
    		System.out.println("执行控制器的demo！！！");
    		return "main.jsp";
    	}
    }

、

[Spring_SpringMvc]: /images/20211223/60f46df25d854f559398fa12b33e5ca3.png