Spring MVC 是 Spring 提供的一个基于 MVC 设计模式的轻量级 Web 开发框架，本质上相当于 Servlet。

需要的jar

 

web.xml配置SpringMVC

<?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"
    id="WebApp_ID" version="3.0">
    <display-name>spring_mvc_lx01</display-name>
    <!-- SpringMVC核心配置文件 -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <!-- SpringMVC的实现 -->
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <!--Spring MVC 初始化时将在应用程序的 WEB-INF 目录下查找配置文件，该配置文件的命名规则是“servletName-servlet.xml”-->
      <!--servletName就是web.xml里对应的servlet-name-->
      <!--例如 springmvc-servlet.xml。 否则执行以下-->
       <!-- 加载SpringMVC其他的配置文件 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:Spring-MVC.xml</param-value>
        </init-param>
        <!-- 优先级 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name> 
        <!-- 需要处理的请求 -->
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

SpringMVC主配置文件

<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"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.2.xsd 
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
        
        <!-- 开启注解配置 -->
        <context:annotation-config/>
        <!-- 扫描指定controller的包(构造扫描) -->
        <context:component-scan base-package="Controller"/>
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <!-- 配置jsp路径的前缀 -->
            <property name="prefix" value="jsp/"/>
            <!-- 配置jsp路径的后缀 -->
            <property name="suffix" value=".jsp"/>
        </bean>
    
</beans>

javabean（entity）

略

Controller

package Controller;

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

import entity.User;
@Controller
public class User_controller {
    @RequestMapping("login.do")
    public String login(User user) {
        System.out.println(user.getUsername()+user.getPassword());
        return "redirect:add.do";
    }
    @RequestMapping("add.do")
    public String add(User user) {
        
        return "success";
    }
}

jsp页面

略

面试题：SpringMVC执行流程