Spring ResponseEntity 和转发

Question

我是一个 SpringBoot 应用程序有一个 REST 控制器，它可以处理多种情况，其中一种情况必须转发给另一个控制器。

@PutMapping(
        value = "/rest/endpoint",
        consumes = MediaType.APPLICATION_JSON_VALUE,
        produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public ResponseEntity<CustomObject> doPut(@RequestBody myDataToBeHandled) {

   if(caseAHolds(myDataToBeHandled){
      return new ResponseEntity<>(null, HttpStatus.BAD_REQUEST);
   }
   else if(caseBHolds(myDataToBeHandled){
      return new ResponseEntity<>(null, HttpStatus.OK);
   }
   else if(caseCHolds(myDataToBeHandled){
     // Redirect here
   }

}

我已经看到 an example 了解如何为重定向执行此操作？

Answer 1

您需要如下所示设置Location标头，以便将请求重定向到另一个URL，如下所示：

@PutMapping(
        value = "/rest/endpoint",
        consumes = MediaType.APPLICATION_JSON_VALUE,
        produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public ResponseEntity<CustomObject> doPut(@RequestBody myDataToBeHandled) {

   if(caseAHolds(myDataToBeHandled){
      return new ResponseEntity<>(null, HttpStatus.BAD_REQUEST);
   }
   else if(caseBHolds(myDataToBeHandled){
      return new ResponseEntity<>(null, HttpStatus.OK);
   }
   else if(caseCHolds(myDataToBeHandled){
     // Redirect here
     HttpHeaders headers = new HttpHeaders();
     headers.add("Location", "ADD_URL_HERE");
     return new ResponseEntity<CustomObject>(headers, HttpStatus. OK);
   }
}