Spring @RequestParam的值/名称为“ status”

Question

I am running a Spring boot MVC application, in my controller I have a @RequestParamter with a value of "status". When I hit this method through a RequestMapping (eg http://localhost:8080/pathToMethod?status=someStatus&otherParam=aThing&status=anotherStatus )

@RequestMapping(method = RequestMethod.GET, value ="pathToMethod")
public responseType methodName(
@RequestParam(value = "otherParam", required = false) List<String> param, 
@RequestParam(value = "status", required = false) List<String> status, 
HttpServletRequest request, HttpServletResponse response){
    //code here 
}

It fails with following error:

Field error in object 'modelAndView' on field 'status': rejected value [Soemthing]; codes [typeMismatch.modelAndView.status,typeMismatch.status,typeMismatch.org.springframework.http.HttpStatus,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [modelAndView.status,status]; arguments []; default message [status]]; default message [Failed to convert property value of type [java.lang.String] to required type [org.springframework.http.HttpStatus] for property 'status'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [org.springframework.http.HttpStatus] for value 'Soemthing'; nested exception is java.lang.IllegalArgumentException: No enum constant org.springframework.http.HttpStatus.Soemthing]

Is there any way to bypass Springs default handling of the "status" parameter so that it does not automatically try to convert it to a HttpResponse?

Link to similar issue

Answer 1

This is happening because you are accepting request parameter as a List but passing only String.

Check the below possible reasons.

1.Remove List<String> and make it String

2.Use any other name for request parameter instead of status because status is the default keyword for org.springframework.http.HttpStatus

Answer 2

With Spring 4 and Java 8 it's possible to have optional path variables with the usage of Optional.

Code :

@RequestMapping(value = {"/path", "/path/{status}")
public String getResource(@PathVariable Optional<String> status) {
  if (status.isPresent()) {
    return service.processResource(status.get());
  } else {
    return service.processResource();
  }
}