fix

wholesale/src/main/java/com/yhlxj/service/code/impl/ExchangeCodeServiceImpl.java

@@ -52,7 +52,7 @@ public class ExchangeCodeServiceImpl implements ExchangeCodeService {
 		if (webWholesaleOrderDonCodeRelate == null) {
 			throw BusinessRuntimeException.getInstance("兑换码不存在");
 		}
-		if (webWholesaleOrderDonCodeRelate.getDhUserId() != 0) {
+		if (webWholesaleOrderDonCodeRelate.getDhUserId() != null && webWholesaleOrderDonCodeRelate.getDhUserId() != 0) {
 			throw BusinessRuntimeException.getInstance("兑换码已使用");
 		}
 		Long orderId = webWholesaleOrderDonCodeRelate.getOrderId();