springMVC的controller的ModelAndView设定的值，无法在jsp显示问题_modelandview中addobject不显示在地址栏-优快云博客

本文链接：https://blog.youkuaiyun.com/xuyoujia1991/article/details/122015755

本文介绍了一个SpringMVC应用案例，详细解析了如何通过ControllerTest类将数据传递到JSP页面，并指出了在JSP页面中正确获取ModelAndView中数据的方法。

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springMVC的controller的ModelAndView的值，无法在jsp显示问题

路径：http://localhost:8080/springmvcDemo_war/ControllerTest
controller

package com.xyj.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 ControllerTest implements Controller {
    @Override
    public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {

        //创建ModelAndView对象
        ModelAndView mav = new ModelAndView();

        //向模型对象中添加一个名称为msg的字符串对象
        mav.addObject("msg","第一个Spring MVC程序");

        //设置返回视图路径
        mav.setViewName("WEB-INF/jsp/welcome.jsp");
        System.out.println("mav:"+mav);
        return mav;
    }
}

jsp

<%--
  Created by IntelliJ IDEA.
  User: ICBC
  Date: 2021/12/18
  Time: 18:09
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>hahhah</title>
</head>
<body>
{msg}
</body>
</html>