修复上一次的排名及热度计算错误问题

src/main/java/com/zhiwei/searchhotcrawler/dao/HotSearchCacheDAO.java

@@ -73,6 +73,9 @@ public class HotSearchCacheDAO  {
            if (Objects.nonNull(nowDoc)) {
                int highestRank = nowDoc.getInteger("highestRank");
                int highestCount = nowDoc.getInteger("highestCount");
+               int preRank = nowDoc.getInteger("lastRank");
+               int preCount = nowDoc.getInteger("lastCount");
+
                //判断最大热度值
                if (lastCount > highestCount) {
                    highestCount = lastCount;
@@ -94,8 +97,8 @@ public class HotSearchCacheDAO  {
                nowDoc.put("lastCount", lastCount);
                nowDoc.put("highestRank", highestRank);
                nowDoc.put("highestCount", highestCount);
-               nowDoc.put("preRank", nowDoc.getInteger("lastRank"));
-               nowDoc.put("preCount", nowDoc.getInteger("lastCount"));
+               nowDoc.put("preRank", preRank);
+               nowDoc.put("preCount", preCount);
                nowDoc.put("duration", durationNow);
                collection.replaceOne(query, nowDoc);
            } else {