Spring MVC 入门

1、Spring MVC
和Struts一样是一个MVC框架，和Strusts2有点相似，和Spring无缝连接，属于Spring的一个框架。
2、环境搭建
1）在eclipse中新建web项目
2）web.xml中添加

  <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*:config/spring-servlet.xml</param-value> 
   </init-param> 
   <load-on-startup>1</load-on-startup> 
  </servlet> 
  <servlet-mapping> 
   <servlet-name>springMVC</servlet-name> 
   <url-pattern>/</url-pattern> 
  </servlet-mapping> 

3）导入所需要的jar包

4)编辑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"
    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</display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>

    <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>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

5)编辑spring-mvc.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:p="http://www.springframework.org/schema/p"
    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">

    <!-- 使用注解的包，包括子集 -->
    <context:component-scan base-package="com.model"/>

    <!-- 视图解析器 -->
    <bean id="viewResolver"
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp"></property>
    </bean>

</beans>

6) HelloSpring.java

package com.model;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HelloWorldController {

    @RequestMapping("/helloWorld")
    public String helloWorld(Model model){
        model.addAttribute("message", "Hello SpringMvc！");
        return "helloWorld";
    }
}