Spring 3 - 在JSP中访问Model值

Question

我有一个JSP,我试图从我的模型中打印出值,但没有出现在我引用这些值的地方.这是我设置值的控制器方法.

@RequestMapping(value = "/poll1", method = RequestMethod.POST)
public String processPoll1(@RequestParam String vote,
        HttpServletResponse response, Model model) {
    Map<String, Object> resultMap = poll1DAO.tallyVote(vote);
    Cookie poll1 = new Cookie("poll1", "voted");
    model.addAttribute("poll1Yes", resultMap.get("yes").toString());
    model.addAttribute("poll1No", resultMap.get("no").toString());
    poll1.setMaxAge(maxSeconds);
    response.addCookie(poll1);
    return "redirect:/polls";
}

这是JSP中引用Model属性的部分.

<table>
    <tr>
        <td><b><i>Poll #1 -- </i></b>Would you like to have a 30-year reunion in 2016?<br></td>
    </tr>
    <tr>
        <td><b>Yes</b></td>
        <td>&nbsp;&ndash;&nbsp;<c:out value='${model.poll1Yes}' /><br /></td>
    </tr>
    <tr>
        <td><b>No</b></td>
        <td>&nbsp;&ndash;&nbsp;<c:out value='${model.poll1No}' /><br />
        </td>
    </tr>
</table>

这是我的输出.不是实际值,而是在属性的位置打印出任何内容.

Poll #1 -- Would you like to have a 30-year reunion in 2016?

Yes  – 

No  –  

Answer 1

无需model在JSP中引用.

<c:out value='${poll1Yes}' />
<c:out value='${poll1No}' />