比较时间先后

if (startTime.compareTo(endTime)>0) {
            return ResponseEntity.badRequest().body(Translator.toLocale("time.compare.failed.message"));
        }

if (startTime.isAfter(endTime)) {
            return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(Translator.toLocale("group.time.failed.message"));
        }