Question

我有以下代码。我想在nextPage.jsp上访问booleanValueObj。这是怎么做到的？对于每个请求，对象并不总是可用于nextPage（）方法，因此requestParam似乎不合适。

@RequestMapping(method=RequestMethod.POST)
public ModelAndView sendEmail()
{
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject(booleanValueObj, true);
    modelAndView.setViewName("redirect: /nextPageClass");
    return modelAndView;
}

@RequestMapping("/nextPageClass")
public class NextPageController 
{
    @RequestMapping(method = RequestMethod.GET)
    public ModelAndView nextPage() 
    {
        ModelAndView modelAndView = new ModelAndView("/nextPage");
        return modelAndView;
    }
}

Answer 1

您无法将booleanValueObj传递给重定向的页面。如果booleanValueObj只是一个布尔值，那么通过请求参数传递给/ nextPageClass似乎是合适的。

@RequestMapping(method=RequestMethod.POST)
public ModelAndView sendEmail(HttpServletResponse resp)
{
    resp.sendRedirect("/nextPageClass?booleanValueObj=true");
    return null;
}

@RequestMapping("/nextPageClass")
public class NextPageController 
{
    @RequestMapping(method = RequestMethod.GET)
    public ModelAndView nextPage(HttpServletRequest req) 
    {
        ModelAndView modelAndView = new ModelAndView("/nextPage");

        Boolean booleanValueObj = null;
        String booleanValueParam = req.getParameter("booleanValueObj");
        if (booleanValueParam != null)
             booleanValueObj = Boolean.parse(booleanValueParse);
        modelAndView.addObject("booleanValueObj", booleanValueObj);

        return modelAndView;
    }
}

Answer 2

对于Spring 3.x，这有效：

@RequestMapping(value = "/item/delete.htm", method = RequestMethod.GET)
public ModelAndView deleteItem(@RequestParam("id") String id) {
    if (isOk(id)) {
       itemService.delete(id);
       return new ModelAndView("/item/list");
    } else {
       return new ModelAndView("redirect:/item/error.htm");  // <== here redirect
    }
}

如何重定向到另一个URI并从以前的modelAndView访问对象

2 个答案: