spring-mvc

1.首先要引入SpringMVC的jar包（由Spring框架提供）。
  建议把所有的spring下载好的jar包全部拷贝到项目中。

2.配置前端控制器（配置一个中央处理器，是把所有的请求都转到该控制器上做处理）。
配置在web.xml里
 <!-- 配置前端控制器 -->
<?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>springmvc3.1</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
     <servlet-name>springmvc2</servlet-name>
     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
     <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>springmvc2</servlet-name>
     <url-pattern>*.action</url-pattern><!--配置的访问路径，一定是按照这种格式写  -->
  </servlet-mapping>
</web-app>
3.创建springmvc.xml代码如下：
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        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.xsd"
        default-autowire="byName"
        >
</beans>
4.配置注解映射器和适配器：
<!-- 配置注解映射器 -->
   <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
<!-- 配置注解适配器 -->
   <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
<context:annotation-config>
           <mvc:annotation-driven>
           </mvc:annotation-driven>
 </context:annotation-config>
5.编写相应的handler处理，需要给每个handler加入Controller的注解，方式如下：
package com.action;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class UserAction {
	@RequestMapping(value="/getalluser.action")
	public ModelAndView getAllUser(){
		ModelAndView model= new ModelAndView();
		model.addObject("ha","hhhihihhishfoihd");
		model.setViewName("/index.jsp");
		return model;
	}

}
6.需要将编写的action或者说是handler加入到spring容器里：
 <context:component-scan base-package="com.action"></context:component-scan>