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dl_admin/ruoyi-admin/src/main/java/com/ruoyi/busi/service/impl/BusiCategoryServiceImpl.java
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@ -93,7 +93,13 @@ public class BusiCategoryServiceImpl extends ServiceImpl<BusiCategoryMapper, Bus
if (categoryList == null || categoryList.isEmpty()) { if (categoryList == null || categoryList.isEmpty()) {
return categoryList; return categoryList;
} }
// 构建id到节点的映射，便于查找
Map<String, BusiCategory> idToCategory = new HashMap<>();
for (BusiCategory category : categoryList) {
idToCategory.put(category.getId(), category);
}
// 构建树结构（找出根节点）
// 找到所有根节点（parentId为null） // 找到所有根节点（parentId为null）
List<BusiCategory> roots = new ArrayList<>(); List<BusiCategory> roots = new ArrayList<>();
for (BusiCategory category : categoryList) { for (BusiCategory category : categoryList) {