Spring MVC，重定向时如何将参数传递到thymeleaf视图

Question

我在我的web应用程序中使用SpringMVC和thymeleaf。

在其中一个场景中，我有一个控制器，在其功能结束时执行重定向。我需要向前端传递一个参数（实际上是一条成功/失败警报消息）。如何实现此行为。

我可以知道model.add属性（）不能在重定向时实现。

以下是控制器代码。

@RequestMapping(value = "delete", method = RequestMethod.GET)
public ModelAndView deleteForm544(@RequestParam("id") final Long inForm544Id) {

    logger.info("Hit the /Form544/delete ");
    logger.info("Change Status Deleted of Form 544 ID : " + inForm544Id);

    JSONObject alertObj = new JSONObject();

    try {
        form544Service.setStatusAsDeleted(inForm544Id);

        alertObj.put("type", "success");
        alertObj.put("msg", "Successfully deleted Form 544 with ID Number " + inForm544Id);

    } catch (Exception e) {
        logger.error("Error occured " + e);

        alertObj.put("type", "fail");
        alertObj.put("msg", "Form 544 deletion failed. Due to " + e.getMessage());
    }

    return new ModelAndView("redirect: filter_view");
}

下面是视图（thymeleaf）代码。[注意：我需要获取javascript变量的值]

<script th:inline="javascript">

    /*<![CDATA[*/
    var alertObj = ([[${alert}]]);
    /*]]>*/

</script>

Answer 1

最后参考一些文章，我可以使用RedirectView和redirectAttributes找到解决方案。setFlashAttributes（）。

以下是控制器（Spring MVC）功能：

@RequestMapping(value = "delete", method = RequestMethod.GET)
public RedirectView deleteForm544(@RequestParam("id") final Long inForm544Id,
        RedirectAttributes redirectAttributes) {

    logger.info("Hit the /Form544/delete ");
    logger.info("Change Status Deleted of Form 544 ID : " + inForm544Id);

    JSONObject alertObj = new JSONObject();

    try {
        form544Service.setStatusAsDeleted(inForm544Id);

        alertObj.put("type", "success");
        alertObj.put("msg", "Successfully deleted Form 544 with ID Number " + inForm544Id);

    } catch (Exception e) {
        logger.error("Error occured " + e);

        alertObj.put("type", "fail");
        alertObj.put("msg", "Form 544 deletion failed. Due to " + e.getMessage());
    }

    RedirectView redirectView = new RedirectView();
    redirectView.setContextRelative(true);
    redirectView.setUrl("filter_view");
    redirectAttributes.addFlashAttribute("alert", alertObj);

    return redirectView;
}

下面是视图（Thymeleaf）代码。[注意：我得到一个JavaScript变量的警报响应]

<script th:inline="javascript">

     /*<![CDATA[*/
    var alertObj = ([[${alert}]]);
    /*]]>*/

</script>