解决时段水位报错

src/main/java/com/gunshi/project/xyt/service/StatisticsService.java

@@ -192,9 +192,11 @@ public class StatisticsService {
                     count++;
                 }
             }
+            if(count > 0){
                 vo.setRzAvg(rzD.divide(new BigDecimal(count), 2, RoundingMode.HALF_UP));
             }
         }
+    }
 
     private SdSwRbVo setHourRz(SdSwRbVo vo, String HH, BigDecimal rz) {
         switch (HH) {