Sprint MVC 之 Hello world

Spring MVC
(MVC这里就不再浪费口舌了,有空可以上百度看看)
主要分享下对SpringMVC的理解.
Spring MVC主要核心是围绕DispatcherServlet,
1.首先在Web.xml中定义Servlet,并优先启动

<servlet>
  	<servlet-name>mvc</servlet-name>
  	<servlet-class> org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
  	<servlet-name>mvc</servlet-name>
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>

2.下来就是创建Controller,(可以糊涂的理解为struts中的Action)

public class HelloAction extends BaseAction {

	protected ModelAndView handleRequestInternal(HttpServletRequest req,
			HttpServletResponse res) throws Exception {
		res.getWriter().println("Hello world");
		return null;
	}
}

3.最后是创建servlet.xml配置文件,(可以糊涂的理解为Struts中的Struts-config.xml)

<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="mappings">
			<props>
				<prop key="/index.do">indexController</prop>
			</props>
		</property>
	</bean>

<prop key="<访问的URL>"><创建的Controller></prop>

4.部署环境
运行结果