SpringMVC原理-小例子

1.springMVC原理：

• springMVC是spring framework的一部分(spring framework即为俗称的spring)

• springMVC是基于java实现mvc的轻量级web框架

2.例子

• 先保证导入了对应的包

• 在idea的项目发布中添加lib依赖

• 配置web.xml，注册DispatcherServlet(请求分发器，前端控制器)

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


    
    
        springmvc
        org.springframework.web.servlet.DispatcherServlet
        
        
            contextConfigLocation
            classpath:springmvc-servlet.xml
        
        
        1
    
    
        springmvc
        /
    
    

• SpringMVC的配置文件，头文件和spring的一样

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


    
    

    
    

    
    
        
        
    


    

• HelloController:

package com.kakafa.controller;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HelloController implements Controller {
    @Override
    public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {

        ModelAndView mv = new ModelAndView();

        //业务代码
        String result="Hello,jeremy!";
        mv.addObject("msg",result);

        //视图跳转
        mv.setViewName("test");//完整的路径即为/WEB-INF/jsp/test.jsp

        return mv;
    }
}

• test.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


${msg}

• 配置tomcat后运行