优化筛选

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

@@ -472,12 +472,8 @@ public class AssetService {
         });
 
         List<UserHistory> content = map.getContent();
-        for (int i = 0; i < content.size(); i++) {
-            UserHistory userHistory = content.get(i);
-            System.out.println("这是第"+i+"次循环： "+userHistory);
-        }
         if (content!=null&&content.size()>0){
-            content.removeAll(Collections.singleton(null));
+            content.removeIf(Objects::isNull);
             Pageable pageable = PageRequest.of(pageQuery.getPage() - 1, pageQuery.getSize());
             map = PageUtil.createPageFromList(content, pageable);
         }