SpringMVC_01_初识

HelloController.java

package controller;
 
 
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
 
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
 
//注意：这里我们先导入Controller接口
public class HelloController implements Controller {
 
 
   public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
       //ModelAndView 模型和视图
       ModelAndView mv = new ModelAndView();
 
 
       //封装对象，放在ModelAndView中。Model
       mv.addObject("msg","HelloSpringMVC!");
       //封装要跳转的视图，放在ModelAndView中
       mv.setViewName("hello"); //: /WEB-INF/jsp/hello.jsp
       return mv;
  }
   
}

springmvc-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">


    class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
    class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>
    
    class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="InternalResourceViewResolver">
        
        
        
        
    


    
    class="controller.HelloController"/>

web.xml

<?xml version="1.0" encoding="UTF-8"?>

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    
    
        springmvc
        class>org.springframework.web.servlet.DispatcherServletclass>
        
            
            contextConfigLocation
            classpath:springmvc-servlet.xml
        
        1
    
    
        springmvc
        /
    

由于springmvc没有导入servlet所需要的一些jar包，所以需要手动导入一些好，不然会出现404