更新热搜cacheDao层

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

@@ -149,7 +149,7 @@ public class HotSearchCacheDAO {
                 Document nowDoc = (Document) collection.find(query).first();
                 if (nonNull(nowDoc)) {
                     Integer highestRank = nowDoc.getInteger("highestRank");
-                    Integer realHighestRank = nowDoc.getInteger("realHighestRank");
+                    Integer realHighestRank = nonNull(nowDoc.getInteger("realHighestRank")) ? nowDoc.getInteger("realHighestRank") : null;
                     Long highestCount = nonNull(nowDoc.get("highestCount")) ? Long.valueOf(nowDoc.get("highestCount").toString()) : null;
                     Integer preRank = nowDoc.getInteger("lastRank");
                     Long preCount = nonNull(nowDoc.get("lastCount")) ? Long.valueOf(nowDoc.get("lastCount").toString()) : null;