修复空指针问题

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

@@ -2932,8 +2932,12 @@ public class DataDashboardService {
 
     @XxlJob("buildCoverStatisticDataExportJob")
     public ReturnT<String> buildCoverStatisticDataExportJob(String param) {
-        String dateStr = DateUtils.getDateString(System.currentTimeMillis() - 24 * 60 * 60 * 1000, "yyyMMdd");
-        coverStatisticDataExport(dateStr);
+        if(StringUtils.hasText(param)){
+            coverStatisticDataExport(param);
+        }else {
+            String dateStr = DateUtils.getDateString(System.currentTimeMillis() - 24 * 60 * 60 * 1000, "yyyMMdd");
+            coverStatisticDataExport(dateStr);
+        }
         return ReturnT.SUCCESS;
     }