java - 如果 Controller 方法返回 ResponseEntity 如何使用 Spring 重定向

Question

我想写这样的东西:

@RequestMapping(value = { "/member/uploadExternalImage",
            "/member/uploadExternalImage" }, method = RequestMethod.GET)
    public ResponseEntity<String> handleFileUpload(@RequestParam String url,@RequestParam String fileName, RedirectAttributes redirectAttributes) {
        ...
        return new ResponseEntity("Cannot save file " + fileName, HttpStatus.INTERNAL_SERVER_ERROR);
        ...
        return "redirect:/member/uploadImage";
    }

预期行为 - 重定向到 Controller :

@RequestMapping(value = { "/member/createCompany/uploadImage",
            "/member/uploadImage" })
    @ResponseBody
    public ResponseEntity<String> handleFileUpload(@Validated MultipartFileWrapper file,
            BindingResult result, Principal principal

但我不能写它，因为 "redirect:/member/uploadImage" 是 String 但应该是 ResponseEntity

我该如何解决我的问题？

Answer 1

如果您不明确需要返回 ResponseEntity，您可以重新声明您的方法，例如:

public String handleFileUpload(@RequestParam String url,@RequestParam String fileName, RedirectAttributes redirectAttributes) {
    return "Cannot save file " + fileName;
    ...
    return "redirect:/member/uploadImage";
}

但是如果您需要使用 ResponseEntity，那么您似乎可以按照 here 的描述添加重定向到 ResponseEntity .

HttpHeaders headers = new HttpHeaders();
headers.add("Location", "/member/uploadImage");    
return new ResponseEntity<String>(headers,HttpStatus.FOUND);