什么是spring-mvc
实现了mvc结构的spring模块，spring-mvc模块封装了web开发中的常用功能，简化了web过程。
DispatcherServlet处理浏览器发来的请求
HandlerMapping将请求转给指定的controller
ModelAndView模型，封装业务处理结果和视图
1新建工程，导入jar包
2在src下添加spring mvc 的xml配置文件，文件名为spring-mvc.xml，该名称不固定。
spring-mvc.xml的代码后面统一给出。
3web.xml中，配置DispathcherServlet前端控制器组件，代码如下
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name></display-name>
<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:/spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.form</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
此时，部署到tomcat并启动就会显示springmvc信息
4配置spring handlermapping组件，在spring-mvc.xml中添加配置信息。
5新建控制处理类HelloController。在spring-mvc.xml中配置该controller为bean。
package com.controller; import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller; public class HelloController implements Controller{ @Override
public ModelAndView handleRequest(HttpServletRequest arg0,
HttpServletResponse arg1) throws Exception {
System.out.println("处理hello.form请求");
ModelAndView mv = new ModelAndView("hello");
return mv;
} }
6添加ViewResolver组件配置
此时，spring-mvc.xml代码为：
<?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"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation=
"http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
<!-- 定义请求处理映射HandlerMapping -->
<bean id = "handlerMapping"
class = "org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<!--指定请求和controller对应的关系 -->
<property name = "mappings" ref = "urlMappings"/>
</bean>
<!-- 定义请求映射表 map -->
<util:properties id="urlMappings">
<prop key="/hello.form">helloController</prop>
</util:properties> <!-- 定义视图解析器viewResolver -->
<bean id = "viewResolver"
class = "org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name = "prefix" value = "/WEB-INF/jsp/"/>
<property name = "suffix" value = ".jsp"/>
</bean> <!-- 控制器bean配置 -->
<bean id = "helloController"
class = "com.controller.HelloController"/>
</beans>
7新建视图组件hello.jsp，在/WEB-INF/jsp中，spring-mvc.xml中已经配置。
<%@page pageEncoding="utf-8" contentType="text/html;charset=utf-8"%>
<!DOCTYPE html>
<html>
<head>
<title>Spring Hello World!</title>
</head>
<body>
hello Spring MVC,日向 2016-01-12,Life is a war,and I must win!
</body>
</html>
8测试
目录结构，期间许多libraries未必必要：
