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..RELEASE</version>

        </dependency>

        <!--引入beans节点-->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-beans</artifactId>

            <version>4.2..RELEASE</version>

        </dependency>

        <dependency>

            <groupId> org.aspectj</groupId >

            <artifactId> aspectjweaver</artifactId >

            <version> 1.8.</version>

        </dependency>

        <!--SpringWebMVC-->

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-webmvc</artifactId>

            <version>4.2..RELEASE</version>

        </dependency>

        <!--ServletAPI-->

        <dependency>

            <groupId>javaee</groupId>

            <artifactId>javaee-api</artifactId>

            <version></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..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></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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SSM-SpringMVC-02：SpringMVC最简单的小案例

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