Question

我有一个Post Controller，它接受一个输入表单字段，经过一些计算和检索db值后，它会重定向到带有两个参数的Get Controller。

@RequestMapping(value = "/user/calculate", method = RequestMethod.POST )
public String compareClients(@Valid UserInfo calculate, BindingResult bindingResult) {

   /*some calculations*/
    long firstClient=calculate.getFirstId();
    long secondClient=calculate.getSecondId();
    ModelAndView modelAndView=new ModelAndView();
    modelAndView.addObject("firstInfo",firstInfo);
    modelAndView.addObject("secondInfo",secondInfo);
    modelAndView.addObject("infoId",id);

return "redirect:/user/calculate?firstId=" + firstClient + "&secondId=" + secondClient;

我想将firstInfo，secondInfo和infoId传递给另一个控制器，以便从那里将它显示在百里香叶上

@RequestMapping(value = "user/calculate", method = RequestMethod.GET, params = { "firstId", "secondId" })
public ModelAndView comparison(@RequestParam(value = "firstId", required = true) String firstId,@RequestParam(value = "secondId", required = true) String secondId) {
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject("firstClient", firstId);
    modelAndView.addObject("secondClient", secondId);
 return modelAndView;
}

我如何实现这一目标？请帮忙。我尝试使用forward而不是重定向，但响应时间太长，并且它不会转发到Get Controller。无法使用flashAttributes，因为如果我刷新页面，我需要Thymeleaf上的信息。我无法通过网址传递所有5个对象。如果隐藏它，那就更好。

Answer 1

我对Thymeleaf没有太多了解，但您可以使用RedirectAttributes将所需的值传递给另一个控制器。由于您的评论希望在刷新页面时保留该值。所以我使用SessionAttributes

给你一个例子

public class YourInfo{
    private String firstInfo;
    private String secondInfo;

    //setter and getter
}

您的控制器类添加会话属性注释

@Controller
@SessionAttributes("myInfo")

现在转到请求部分。

@RequestMapping(value = "/user/calculate", method = RequestMethod.POST )
public String compareClients(@Valid UserInfo calculate, BindingResult bindingResult, Model model) {

   /*some calculations*/
    long firstClient=calculate.getFirstId();
    long secondClient=calculate.getSecondId();
    ModelAndView modelAndView=new ModelAndView();
    modelAndView.addObject("firstInfo",firstClient);
    modelAndView.addObject("secondInfo",secondClient);
    modelAndView.addObject("infoId",id);
    if(!model.containsAttribute("myInfo")){
        YourInfo yourInfo = new YourInfo();
        yourInfo.setFirstInfo(String.valueOf(firstClient));
        yourInfo.setSecondInfo(String.valueOf(secondClient));
        model.addAttribute("myInfo",yourInfo);
    }

    return "redirect:/user/calculate";
}

你的获取控制器（假设你的firstInfo和secondInfo将是字符串）

@RequestMapping(value = "user/calculate", method = RequestMethod.GET)
public ModelAndView comparison(@ModelAttribute("myInfo") YourInfo yourInfo) {
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject("firstClient", yourInfo.getFirstInfo());
    modelAndView.addObject("secondClient", yourInfo.getSecondInfo());
    return modelAndView;
}

重定向到接收控制器后传递modelAndView对象

1 个答案: