Springmvc的入门---配置

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Spring为展现层提供的基于MVC设计理念的优秀的WEB框架，是目前最主流的MVC框架之一。在动态web环境下编制简单的Springmvc功能，了解springmvc的配置及其实现功能的流程。
1.加入jar包
这里写图片描述
2.在web.xml中配置DispatcherServlet

<?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_2_5.xsd" id="WebApp_ID" version="2.5">  <display-name>springmvc-1</display-name>  <!--配置DispatcherServlet-->    <servlet>        <servlet-name>dispatcherServlet</servlet-name>        <servlet-class>            org.springframework.web.servlet.DispatcherServlet        </servlet-class>        <!-- 配置 DispatcherServlet 的一个初始化参数: 配置 SpringMVC 配置文件的位置和名称 -->        <!--             实际上也可以不通过 contextConfigLocation 来配置 SpringMVC 的配置文件, 而使用默认的.            默认的配置文件为: /WEB-INF/<servlet-name>-servlet.xml        -->        <!--          <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>dispatcherServlet</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping></web-app>

3.编写处理请求的处理器，并标识为处理器：

<?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"    xmlns:aop="http://www.springframework.org/schema/aop"    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd        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-4.0.xsd">    <!-- 配置自动扫描的包 -->    <context:component-scan base-package="com.atguigu.springmvc">    </context:component-scan>    <!-- 配置视图解析器：如何把控制层中方法返回值解析为实际的物理视图 -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix" value="/WEB-INF/views/"></property>        <property name="suffix" value=".jsp"></property>    </bean></beans>

4.简单的jsp页面

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>    <a href="helloworld">Hello World</a></body></html>

5.控制层代码

package com.atguigu.springmvc.handlers;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controllerpublic class HelloWorld {    @RequestMapping("/helloworld")    public String hello(){        System.out.println("hello world");        return "success";    }}

6.最终显示的视图代码

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>    <h4>Sucess Page</h4></body></html>

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