fix: 防止重复支付

fs-service-system/src/main/java/com/fs/store/service/impl/FsStoreOrderServiceImpl.java

@@ -3182,8 +3182,8 @@ public class FsStoreOrderServiceImpl implements IFsStoreOrderService
                 return R.error("此订单没有可支付的金额");
             }
 
-            String orderId=redisCache.getCacheObject("isPaying:"+order.getId());
-            if(StringUtils.isNotEmpty(orderId)&&orderId.equals(order.getId().toString())){
+            Object isPaying=redisCache.getCacheObject("isPaying:"+order.getId());
+            if(ObjectUtil.isNotNull(isPaying)){
                 return R.error("正在支付中...");
             }