Spring Mvc 入门Demo

1、web.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"version="3.1">  <context-param>   --Spring Controller 配置<param-name>contextConfigLocation</param-name><param-value>/WEB-INF/dispatcher-servlet.xml</param-value> </context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>
    <servlet>  --Spring mvc 默认调度<servlet-name>dispatcher</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcher</servlet-name><url-pattern>/</url-pattern></servlet-mapping><servlet-mapping><servlet-name>sh</servlet-name><url-pattern>/servlet/sh</url-pattern></servlet-mapping>
</web-app>

spring快速入门教程。load-on-startup：表示启动容器时初始化该Servlet；

url-pattern：表示哪些请求交给Spring Web MVC处理，配置Spring的配置文件，默认DispatcherServlet会加载WEB-INF/[DispatcherServlet的Servlet名字]-servlet.xml配置文件.

 

2、dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context"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-3.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsd"><context:component-scan base-package="com.javahash.spring.controller"></context:component-scan>   --配置扫描包<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value=""></property>     --路径前缀<property name="suffix" value=".jsp"></property> --路径后缀</bean>
</beans>

3、Controller 代码

package com.javahash.spring.controller;import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;import java.util.logging.Logger;/*** Created by Administrator on 2014/11/8.*/
@Controller
public class HelloWorldController {
@RequestMapping("/hello")public String hello(@RequestParam(value="name", required=false, defaultValue="World") String name, Model model) {model.addAttribute("name", name);return "helloworld";}
}