折线图

ch-wx-api/src/main/java/com/wwdz/ch/wx/impl/QueryPriceServiceImpl.java

@@ -22,6 +22,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.util.CollectionUtils;
 import org.springframework.util.StringUtils;
 
 import java.time.*;
@@ -68,6 +69,9 @@ public class QueryPriceServiceImpl implements QueryPriceService {
             List<String> xData = new ArrayList<>();
             List<Object> valueList = new ArrayList<>();
             double totalPrice = 0;
+            Map<String, Object> map = new HashMap<>();
+            map.put("details", CategoryVo.of(category));
+
             for (BidRecord bidRecord : bidRecordList) {
                 int bidTime = bidRecord.getBidTime();
                 Instant instant = Instant.ofEpochSecond(bidTime);
@@ -78,18 +82,19 @@ public class QueryPriceServiceImpl implements QueryPriceService {
                 totalPrice += (bidRecord.getPrice() / (double)100);
                 valueList.add(bidRecord.getPrice() / (double)100 / (double)10000);
             }
-            double averagePrice = totalPrice / bidRecordList.size();
+            double averagePrice = 0;
+            if (!CollectionUtils.isEmpty(bidRecordList)) {
+                averagePrice = totalPrice / bidRecordList.size();
+                Instant instant = Instant.ofEpochSecond(bidRecordList.get(bidRecordList.size() - 1).getBidTime());
+                LocalDateTime date = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
+                DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy年MM月dd日");
+                map.put("priceUpdateTime",  date.format(formatter));
+            }
             Chart chart = new Chart();
             chart.setXData(xData);
             chart.setValues(valueList);
-            Map<String, Object> map = new HashMap<>();
-            map.put("details", CategoryVo.of(category));
             map.put("chart", chart);
             map.put("averagePrice", averagePrice);
-            Instant instant = Instant.ofEpochSecond(bidRecordList.get(bidRecordList.size() - 1).getBidTime());
-            LocalDateTime date = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
-            DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy年MM月dd日");
-            map.put("priceUpdateTime",  date.format(formatter));
             return Result.success(map);
         } catch (Exception e) {
             logger.error("查询类目价格详情失败:{}", e);