fixbugs

@@ -116,7 +116,7 @@ public class CouponServiceImpl implements ICouponService {
         // 有效期
         Range<Integer> validityRange = null;
 
-        if (validityDay != null){
+        if (validityDay != null && validityDay!=0){
             Integer now = DateUtil.getCurrentTimeSecond();
             Integer end = (int) LocalDateTime.of(LocalDate.now().plusDays(validityDay), LocalTime.MAX).toEpochSecond(ZoneOffset.of("+8"));
             validityRange = Range.open(now, end);