SSM-SpringMVC-02：SpringMVC最简单的小案例

------------吾亦无他,唯手熟尔，谦卑若愚，好学若饥-------------

咱们这个案例做什么？

　　就是用处理器代替Servlet处理请求

开发步骤：

　　1.引入jar包

<!--单元测试的依赖  ctrl+shif+/-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>

        <!--引入beans节点-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>


        <dependency>
            <groupId> org.aspectj</groupId >
            <artifactId> aspectjweaver</artifactId >
            <version> 1.8.7</version>
        </dependency>

        <!--SpringWebMVC-->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>


        <!--ServletAPI-->
        <dependency>
            <groupId>javaee</groupId>
            <artifactId>javaee-api</artifactId>
            <version>5</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
            <scope>runtime</scope>
        </dependency>


        <!--SpringWeb-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.2.0.RELEASE</version>
        </dependency>

　　2.具体的开发流程

　　　　此处标红的表示需要配置的，未标红的表示本身就有默认值，可以无需配置springmvc也能执行

　　3.准备一个index.jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<body>
<h2>Hello SpringMVC!今天揭开你的新面纱</h2>
</body>
</html>

　　4.创建一个类FirstController

package cn.dawn.day01;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by Dawn on 2018/3/19.
 */
//处理器
public class FirstController implements Controller {
    /**
     * handleRequest    处理请求
     * @param httpServletRequest
     * @param httpServletResponse
     * @return
     * @throws Exception
     */
    public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        ModelAndView me=new ModelAndView();
        me.setViewName("index.jsp");
        return me;
    }
}

　　5.配置大配置文件ApplicationContext-day01.xml

<?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">

    <!--配置bean处理器-->
    <bean id="/first" class="cn.dawn.day01.FirstController"></bean>
</beans>

　　6.web.xml配置前端控制器

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <!--中央调度器-->
  <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:ApplicationContext-day01.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>

　　配置完成，打开tomcat服务器中，在网页url中访问http://localhost:8080/项目名/first（根据你自己的配置来）

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原文地址：https://www.cnblogs.com/DawnCHENXI/p/8603705.html