基于maven配置最简SpringMVC

一、我的目录结构

二、maven的相关spring依赖

 <dependencies>
    <!--添加springMVC的支持-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1.2</version>
    </dependency>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

二、配置Spring的DispatcherServlet

1、什么是DispatcherServlet？

• DispatcherServlet实质也是一个HttpServlet，DispatcherSevlet负责将请求分发，所有的请求都有经过它来 统一分发到我们自己定义的Controller的方法中。

2、配置方法

• 在WEB-INF目录下的web.xml文件中配置

 <!--配置spring相关-->
  <servlet>
    <servlet-name>SpringMVC</servlet-name>
    <!--配置DispatcherServlet-->
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--初始化自定义springmvc配置文件地址，我当前是放在resource文件目录下-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath*:spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <!-- 指的是所有URL都会映射到这个servlet -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>

• 配置spring-mvc.xml文件，主要是要进行组件扫描，并使用注解，所以 <context:component-scan /> 和 <mvc:annotation-driven /> 两个标签很重要，具体可以自行百度。到这一步基本上就配置完成，我们去Controller中写一个方法测试一下

<?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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-4.2.xsd">

    <!--添加注解扫描-->
    <context:component-scan base-package="com.springmvc.controller"/>
    <context:component-scan base-package="com.springmvc.service"/>
    <!--注解驱动，以使得访问路径与方法的匹配可以通过注解配置-->
    <mvc:annotation-driven />
    <mvc:resources mapping="/static/**" location="/static/"/>
    <!-- 配置视图解析器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--加载上传的bean-->
    <bean id="multipartResolver"  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="104857600"/>
        <property name="defaultEncoding" value="UTF-8" />
    </bean>

</beans>

3、写测试的Controller

package com.springmvc.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * @author LCX
 * @date 2020/7/1
 */

@Controller
public class InputProductController {
    @RequestMapping("/test")
    public void test1(){
        System.out.println("Hello Word!");
    }
}

• 最后运行结果
  
  我们来看看控制台，发现控制台以及打印出来了。所以 SpringMVC配置成功
  
  项目demo下载点击这里