SpringMvc ModelAndView传值失败，该怎么解决

Question

@RequestMapping("/goodsTable")
    public ModelAndView goodsTable() {
        ModelAndView m=new ModelAndView("redirect:/goods_table.jsp");
        List<Goods> list=new GoodsDao().findGoods();
        for(Goods s:list) {
            System.out.println(s.getGoods_id()+s.getGoods_name()+s.getImg()+s.getIntro()+s.getPrice());
        }
        m.addObject("goods_list", list);
        return m;       
    }

得到了
12123.png1

2电脑123.pngnull5999

3平板456.pngnull3999

4游戏机678.pngnull1999

5电视机336.png2599
说明传入的时候不是空的
添加了<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
并且导包了

<c:forEach items="${goods_list}" var="s">
                55555<c:out value="${s.goods_id}"></c:out>
            </c:forEach>

传出的时候什么都没输出，说明这儿的goods_list是空的，这是怎么回事

Answer 1

加入session

@RequestMapping("/goodsTable")
    public ModelAndView goodsTable(HttpSession session) {
        ModelAndView m=new ModelAndView("redirect:/goods_table.jsp");
        List<Goods> list=new GoodsDao().findGoods();
        for(Goods s:list) {
            System.out.println(s.getGoods_id()+s.getGoods_name()+s.getImg()+s.getIntro()+s.getPrice());
        }
        //m.addObject("goods_list", list);
                session.setAttribute("goods_list",list);
        return m;       
    }

答对了的话，给满分给我哈