spring学习笔记-----(MVC学习)

1、首先配置web.xml文件，用来处理页面请求。
<servlet>
<servlet-name>hello</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/mvc-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>hello</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
2、配置mvc-config.xml文件
<beans>
<bean name="/hello.do"
class="onlyfun.caterpillar.HelloController">
<property name="viewPage">
<value>/hello.jsp</value>
</property>
</bean>
</beans>
3、配置处理类（控制器）
所有的控制器，也就是action必需实现org.springframework.mvc.Controller接口，或者继承AbstractController抽象类。当继承时，需要实现handleRequestInternal(HttpServletRequest,HttpServletRespoonse)抽象方法。
public class LoginAction implements Controller {

private String viewPage="hello";
public ModelAndView handleRequest(HttpServletRequest req, HttpServletResponse res) throws Exception {
String user=req.getParameter("username");
Map map=new HashMap();
map.put("qqq",user);
return new ModelAndView(viewPage,"user",map);

}
public void setViewPage(String viewPage) {
this.viewPage = viewPage;
}
}