Spring MVC：在tomcat中的@ResponseBody异常处理程序上使用@ResponseStatus（reason =''）
问题内容：
有谁知道为什么我@ResponseStatus(reason = "My message")仍然无法返回@ResponseBody时在Spring
MVC中不能在异常处理程序上使用。似乎发生的是，如果我使用该reason属性
// this exception handle works, the result is a 404 and the http body is the json serialised
// {"message", "the message"}
@ExceptionHandler
@ResponseStatus(value = HttpStatus.NOT_FOUND)
public Map<String, String> notFoundHandler(NotFoundException e){
return Collections.singletonMap("message", e.getMessage());
}
// this doesn't... the response is a 404 and the status line reads 'Really really not found'
// but the body is actually the standard Tomcat 404 page
@ExceptionHandler
@ResponseStatus(value = HttpStatus.NOT_FOUND, reason = "Really really not found")
public Map<String, String> reallyNotFoundHandler(ReallyNotFoundException e){
return Collections.singletonMap("message", e.getMessage());
}
问题答案：
看来，这是以下代码的直接结果： AnnotationMethodHandlerExceptionResolver
private ModelAndView getModelAndView(Method handlerMethod, Object returnValue, ServletWebRequest webRequest)
throws Exception {
ResponseStatus responseStatusAnn = AnnotationUtils.findAnnotation(handlerMethod, ResponseStatus.class);
if (responseStatusAnn != null) {
HttpStatus responseStatus = responseStatusAnn.value();
String reason = responseStatusAnn.reason();
if (!StringUtils.hasText(reason)) {
// this doesn't commit the response
webRequest.getResponse().setStatus(responseStatus.value());
}
else {
// this commits the response such that any more calls to write to the
// response are ignored
webRequest.getResponse().sendError(responseStatus.value(), reason);
}
}
/// snip
}
这已在SPR-8251中报告给Springsource ：
