优化筛选

src/main/java/com/izouma/nineth/service/AssetService.java

@@ -473,9 +473,12 @@ public class AssetService {
 
         List<UserHistory> content = map.getContent();
         if (content!=null&&content.size()>0){
-            List<UserHistory> nullList = new ArrayList();
-            nullList.add(null);
-            content.removeAll(nullList);
+            for (int i = 0; i < content.size(); i++) {
+                if (content.get(i)==null) {
+                    content.remove(i);
+                    i--;
+                }
+            }
             Pageable pageable = PageRequest.of(pageQuery.getPage() - 1, pageQuery.getSize());
             map = PageUtil.createPageFromList(content, pageable);
         }