修复空指针问题

long-article-recommend-service/src/main/java/com/tzld/longarticle/recommend/server/service/recommend/DataDashboardService.java

@@ -3028,6 +3028,9 @@ public class DataDashboardService {
         List<String> rootSourceIdList = new ArrayList<>();
         for (Article article : articleList) {
             List<String> rootSourceIds = JSONArray.parseArray(article.getRootSourceIdList(), String.class);
+            if(CollectionUtils.isEmpty(rootSourceIds)){
+                continue;
+            }
             rootSourceIdMap.put(article.getWxSn(), rootSourceIds);
             rootSourceIdList.addAll(rootSourceIds);
         }