1.配置web.xml文件：
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
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>AweekServer1.1</display-name>
<servlet>
<servlet-name>user</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>user</servlet-name>
<!-- 使用"/* "就不行，这是为什么呢？-->
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
2.在web-inf下配置servlet.xml文件：
<?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"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.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.xsd">
<mvc:annotation-driven/>
<context:component-scan base-package="com.aweek.controller"></context:component-scan>
<!-- 配置从逻辑视图到物理试图的映射对象 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
3.写一个controller：
@Controller
public class UserController {
/**
* 注意：方法必须是public属性，第一次写的时候变成了私有属性，结果老是加载不了。
*'/'表示的是在url-pattern中设置的路径。
*/
@RequestMapping("/hello")
public void helloWorld(){
System.out.println("helloWorld");
}
}
4.运行
5.如何获取Response与request对象：
@RequestMapping("/get")
public String getRequest(HttpServletRequest request,HttpServletResponse response){
request.setAttribute("hello", "你好");
//自动映射到hello.jsp中的表达式
return "hello";
}
}
hello.jsp:
<%@ 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>
<h1>hello:${hello }${string }</h1>
</body>
</html>
关于Servlet中Url正确匹配的问题：
http://www.oschina.net/question/554525_135696
* Controller是单例的.不是线程安全的。所以不要有类的参数。
