springMVC 体味springMVC

springMVC 体验springMVC

springMVC是spring的一个模快：

使用springMVC的开发步骤：

1)导入jar包：spring核心包+spring-web-3.2.5.RELEASE(spingweb核心博爱).jar+spring-webmvc-3.2.5.RELEASE.jar(spingweb的包)

2)导入映射文件：sping源码包中搜索xmls:mvc约束 找到指定的约束配置

3)在web.xml中配置springmvc的核心类DispatcherServlet

4)写一控制器类HelloAction实现controller接口或者继承AbstractController类

5)在WEB-INF目录下写一个命名为<servlet-name>（这是核心类在web.xml的配置名称）,假设名称为action那么需要在这个目录下写一个action-servlet.xml的文件

案例：

web.xml的配置----->这个类间接的继承了HttpServlet类的接口,因此我们知道springmvc是单例模式..即action只创建一次.

<servlet>  	<servlet-name>action</servlet-name>  	<servlet-class> org.springframework.web.servlet.DispatcherServlet</servlet-class>  </servlet>  <servlet-mapping>  	<servlet-name>action</servlet-name>  	<url-pattern>*.action</url-pattern>  </servlet-mapping>

HelloAction

package cn.itcast.springmvc01;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.AbstractController;public class HelloAction extends AbstractController{	@Override	protected ModelAndView handleRequestInternal(HttpServletRequest request,			HttpServletResponse response) throws Exception {		System.out.println("Hello SpringMVC!");		ModelAndView modelAndView=new ModelAndView();		modelAndView.setViewName("index.jsp");		return modelAndView;	}	}

WEB-INF下的命名为action-servlet.xml的文件

<?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:aop="http://www.springframework.org/schema/aop"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:tx="http://www.springframework.org/schema/tx"    xmlns:mvc="http://www.springframework.org/schema/mvc"    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        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop.xsd        http://www.springframework.org/schema/tx 		http://www.springframework.org/schema/tx/spring-tx.xsd 		http://www.springframework.org/schema/mvc        http://www.springframework.org/schema/mvc/spring-mvc.xsd        ">        <!-- 注册控制器类 -->        <bean name="/hello.action" class="cn.itcast.springmvc01.HelloAction"></bean>       	</beans>

HelloAction转发到的index.jsp

body>   Hello Spring MVC <br>  </body>

运行测试 ：