@Slf4j
@RestControllerAdvice
public class ExceptionAdvice {

@ResponseBody
@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
@ExceptionHandler(Exception.class)
public String validExceptionHandler(Exception e) {
    log.error("执行异常",e);
    if (e instanceof MethodArgumentNotValidException) {
        MethodArgumentNotValidException exception = (MethodArgumentNotValidException) e;
        //将错误信息返回给前台
        return exception.getBindingResult().getFieldError().getDefaultMessage();
    }
    else if(e instanceof EmosException){
        EmosException exception=(EmosException)e;
        return exception.getMsg();
    }
    else if(e instanceof UnauthorizedException){
        return "你不具有相关权限";
    }
    else {
        return "后端执行异常";
    }

}

}
老师，这里加了@RestControllerAdvice后，里面的@ResponseBody是不是不用加？

@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)这是啥意思？第一次见这个注解