门架数据默认为0

zc-business/src/main/java/com/zc/business/domain/TrafficFlowStatisticsMap.java

@@ -18,7 +18,7 @@ public class TrafficFlowStatisticsMap {
         private String direction;
         private String statisticalDate;
         private String facilityName;
-        private Long trafficVolume;
+        private Long trafficVolume = 0L; // 默认值;
         private String periodType;
 
 }