feat: 体系树支持根据字段nodeOrder排序，如果字段为null则视为0

laws-modules/src/main/java/com/jero/modules/laws/standard/service/impl/LawsTreeNodeServiceImpl.java

@@ -70,6 +70,7 @@ public class LawsTreeNodeServiceImpl extends ServiceImpl<LawsTreeNodeMapper, Law
         }
         // 调用wrapTreeDataToTreeList方法生成树状数据
         List<LawsTreeNodeModel> lawsTreeNodeModels = FindsTreeNodeChildrenUtil.wrapTreeDataToTreeList(lawsTreeNodes);
+        this.sortTreeNodes(lawsTreeNodeModels);
         // 添加我的收藏节点
         if ("我的收藏".contains(nodeName) && StringUtils.isBlank(option)) {
             LawsTreeNodeModel myCollect = new LawsTreeNodeModel();
@@ -83,6 +84,25 @@ public class LawsTreeNodeServiceImpl extends ServiceImpl<LawsTreeNodeMapper, Law
         return lawsTreeNodeModels;
     }
 
+    /**
+     * 对树形结构中的每个节点的子节点按照 nodeOrder 进行排序
+     * @param nodes 树节点列表
+     */
+    public void sortTreeNodes(List<LawsTreeNodeModel> nodes) {
+        if (nodes == null || nodes.isEmpty()) {
+            return;
+        }
+
+        // 对当前层级的节点按 nodeOrder 排序，将 null 视为 0
+        nodes.sort(Comparator.comparingInt(node ->
+                node.getNodeOrder() != null ? node.getNodeOrder() : 0));
+
+        // 递归对每个节点的子节点进行排序
+        for (LawsTreeNodeModel node : nodes) {
+            sortTreeNodes(node.getChildren());
+        }
+    }
+
     private Set<LawsTreeNode> findPathToRoot(List<LawsTreeNode> allNodes, LawsTreeNode node) {
         Set<LawsTreeNode> pathNodes = new HashSet<>();
         LawsTreeNode[] currentHolder = new LawsTreeNode[1];