[英]get modelandview object in another controller
I am working to pass data from one controller to another. 我正在努力将数据从一个控制器传递到另一个控制器。 I have one class that is annotated with @ControllerAdvice that is used to handle all exception of application. 我有一个用@ControllerAdvice注释的类,用于处理所有应用程序异常。
I am processing exception and adding them to custom class then in ModelAndView I am adding that and passing to another controller using redirect. 我正在处理异常并将它们添加到自定义类然后在ModelAndView中我添加它并使用重定向传递给另一个控制器。 And in that controller I want that added object but I don't have much idea about it how to get that object. 在那个控制器中我想要添加的对象,但我对它如何获得该对象并不太了解。 I have tried some trick but did not get success. 我尝试了一些技巧,但没有成功。
Code: 码:
ExceptionHandler class: ExceptionHandler类:
@ControllerAdvice
public class DefaultExceptionHandler {
@Autowired
private CPro cPro;
private static final Logger LOG = LoggerFactory.getLogger(DefaultExceptionHandler.class);
@RequestMapping(produces = {MediaType.APPLICATION_JSON_VALUE})
@ExceptionHandler(Exception.class)
@ResponseStatus(value = INTERNAL_SERVER_ERROR)
@ResponseBody
public ModelAndView handleException(Exception ex) {
ModelAndView modelAndView = new ModelAndView("redirect:/");
String exceptionType = ex.getClass().getSimpleName();
DefaultExceptionHandler.LOG.error("Internal Server Exception", ex);
ErrorResponse response = new ErrorResponse();
if (ex.getCause() != null) {
response.addSimpleError(exceptionType, ex.getCause().getMessage(), cPro.getProName());
} else {
response.addSimpleError(exceptionType, ex.getMessage(), cPro.getProName());
}
modelAndView.addObject("processingException", response);
return modelAndView;
}
}
my home controller: 我的家庭控制员:
@RequestMapping(value = "/", method = RequestMethod.GET)
public String getHomePage(@ModelAttribute("processingException") ErrorResponse errorResponse, Model model) {
// I want to get object data of processingException added in exception handler using ModelAndView
model.addAttribute("processingException", errorResponse.getError() == null ? null : errorResponse);
return "upscale"; //here upscale.html redirection
}
Does anyone have idea that how to get that object data in my controller ? 有谁知道如何在我的控制器中获取该对象数据?
Thanks. 谢谢。
After a lot googling and searching various forums and article, I found some solution. 经过大量的谷歌搜索和搜索各种论坛和文章后,我找到了一些解决方案。 I have combined data and code of various forums I have made my requirement fulfill. 我已经结合了我的要求实现的各种论坛的数据和代码。
We can use FlashMap for that. 我们可以使用FlashMap 。 Just get context of request and add FlashMap and add other data to FlashMap as well. 只需获取请求的上下文并添加FlashMap并将其他数据添加到FlashMap中。
Code: 码:
@ControllerAdvice
public class DefaultExceptionHandler {
@Autowired
private CPro cPro;
private static final Logger LOG = LoggerFactory.getLogger(DefaultExceptionHandler.class);
@ExceptionHandler(Exception.class)
public String handleException(Exception ex, HttpServletRequest request) throws IOException {
DefaultExceptionHandler.LOG.error("Internal Server Exception", ex);
String exceptionType = ex.getClass().getSimpleName();
ErrorResponse response = new ErrorResponse();
if (ex.getCause() != null) {
response.addError(exceptionType, ex.getCause().getMessage(), cPro.getProName());
} else {
response.addError(exceptionType, ex.getMessage(), cPro.getProName());
}
FlashMap outputFlashMap = RequestContextUtils.getOutputFlashMap(request);
if (outputFlashMap != null) {
outputFlashMap.put("processingException", response);
}
return "redirect:/";
}
}
and other hand, in controller use ModelAttribute to get data that is sent from exception handler method. 另一方面,在控制器中使用ModelAttribute来获取从异常处理程序方法发送的数据。
code: 码:
@RequestMapping(value = "/", method = RequestMethod.GET)
public String getHomePage(Model model, @ModelAttribute("processingException") Object processingException) {
if (processingException instanceof ErrorResponse) {
model.addAttribute("processingException", ((ErrorResponse) processingException).getError());
} else {
model.addAttribute("processingException", null);
}
return "upscale"; //here upscale.html redirection
}
After all bingo.. Done my work. 毕竟宾果..完成我的工作。
If anyone have still better idea on it then still welcome.. 如果有人对它有更好的想法,那么仍然欢迎..
Thanks guys. 多谢你们。
You could make a workaround like this: 你可以像这样做一个解决方法:
public ModelAndView handleException(Exception ex, HttpServletRequest req) {
//...
ModelAndView modelAndView = new ModelAndView("forward:/");
//...
req.setAttribute("processingException", response);
Then in your Controller Method you have access to HttpServletRequest and get the Attribute (Object): 然后在您的Controller方法中,您可以访问HttpServletRequest并获取属性(对象):
public String getHomePage(@ModelAttribute("processingException", HttpServletRequest req)
{
//....
req.getAttribute("processingException");
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