实现：组件库一二三级的合并

src/main/java/com/yeejoin/amos/api/tool/face/service/ToolLibraryService.java

@@ -2,7 +2,6 @@ package com.yeejoin.amos.api.tool.face.service;
 
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.yeejoin.amos.api.tool.face.model.ToolLibraryDetailModel;
-import com.yeejoin.amos.api.tool.face.model.TemplateCategoryTreeModel;
 import com.yeejoin.amos.api.tool.face.model.ToolLibraryModel;
 import com.yeejoin.amos.api.tool.face.model.ToolLibraryTreeModel;
 import com.yeejoin.amos.api.tool.face.orm.dao.ToolLibraryMapper;
@@ -50,7 +49,15 @@ public class ToolLibraryService extends BaseService<ToolLibraryModel, ToolLibrar
             model.setParentId(Long.valueOf(map.get("parent").toString()));
             displayLists.add(model);
         }
-        return getChildren(displayLists);
+        //新建一个用于接收数据的list
+        List<ToolLibraryTreeModel> resultList = new ArrayList<>();
+        for (ToolLibraryTreeModel result : displayLists) {
+            if (result.getParentId() == 0) {
+                //调用方法给子类添加数据
+                resultList.add(getMenuTree(result, displayLists));
+            }
+        }
+        return resultList;
     }
 
     public Page<ToolLibraryDetailModel> queryForComponentListDetails(Page<ToolLibraryDetailModel> page, String sequenceNbr)
@@ -110,39 +117,18 @@ public class ToolLibraryService extends BaseService<ToolLibraryModel, ToolLibrar
         return page;
     }
 
-    public List<ToolLibraryTreeModel> getChildren(List<ToolLibraryTreeModel> nodes) {
-        List<ToolLibraryTreeModel> resultList = new ArrayList<>();
-        for (ToolLibraryTreeModel model1 : nodes) {
-            for (ToolLibraryTreeModel model2 : nodes) {
-                if (model2.getParentId().equals(model1.getId())){
-                    resultList.add(model2);
+    private ToolLibraryTreeModel getMenuTree(ToolLibraryTreeModel result, List<ToolLibraryTreeModel> list) {
+        for (ToolLibraryTreeModel treeModel : list) {
+            //如果父类主键等于传过来实体类的ID
+            if (treeModel.getParentId().equals(result.getId())) {
+                if (result.getChildren() == null) {
+                    result.setChildren(new ArrayList<>());
                 }
+                // 递归调用
+                result.getChildren().add(getMenuTree(treeModel, list));
             }
-            model1.setChildren(resultList);
-            resultList=new ArrayList<>();
         }
-        nodes.removeIf(model -> model.getChildren() == null || model.getChildren().size() == 0);
-        return nodes;
+        return result;
     }
 
-
-//    /**
-//     * 获得模板分类子节点（递归）
-//     */
-//    public List<ToolLibraryTreeModel> getChildren(List<ToolLibraryTreeModel> nodes, String parent, Long id) {
-//        List<ToolLibraryTreeModel> treeModels = new ArrayList<>();
-//        for (ToolLibraryTreeModel node : nodes) {
-//            if (node.getParentId() == 0L && parent.equals("")) {
-//                node.setChildren(getChildren(nodes, node.getDesignerType(), node.getId()));
-//                treeModels.add(node);
-//            } else {
-//                if (parent.equals(node.getDesignerType()) && node.getParentId() != 0L) {
-//                    node.setParentId(id);
-//                    treeModels.add(node);
-//                }
-//            }
-//        }
-//        return treeModels;
-//    }
-
 }