springMVC学习笔记(二) ---- controller注解

<?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:context="http://www.springframework.org/schema/context"
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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> 
<!--1首先就是配置handlerMapping,是把请求交给一个特定的controller-->
<!--配置handlerMapper,找的是mapping-->
<!--<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>-->

<!--2之后是配置handlerAdapter,这个是对Handler进行具体的调用-->
<!--配置handlerAdapter,找的是controller-->
<!--<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>-->

<!--3Handler对数据处理完成以后将返回一个ModelAndView()-->
<!--4DispatcherSevlet通过ViewResolver将逻辑视图转化为真正的视图View-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--结果视图的前缀+后缀-->
<property name="prefix" value="/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>

<!--第二课启动扫描-->
<!--启动Spring MVC的注解扫描功能,启用扫描要注释上面2个,因为冲突-->
<context:component-scan base-package="com.controller"/>

</beans>

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class HelloAnnotationController {
@RequestMapping("/hello3")
public ModelAndView hello3(){
System.out.println("成功来到helloController");
ModelAndView mv = new ModelAndView();
//视图名
mv.setViewName("hello");//相当于去/hello.jsp

//封装要显示到视图中的数据
mv.addObject("msg","wolagecacaca");

System.out.println(mv);
return mv;
}
}