新增：新增系统管理/部门管理/新增功能

continew-admin-common/src/main/java/top/charles7c/cnadmin/common/util/TreeUtils.java

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+/*
+ * Copyright (c) 2022-present Charles7c Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package top.charles7c.cnadmin.common.util;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+import cn.hutool.core.collection.CollUtil;
+import cn.hutool.core.lang.tree.Tree;
+import cn.hutool.core.lang.tree.TreeNodeConfig;
+import cn.hutool.core.lang.tree.TreeUtil;
+import cn.hutool.core.lang.tree.parser.NodeParser;
+import cn.hutool.core.util.ReflectUtil;
+
+/**
+ * 树工具类
+ *
+ * @author Charles7c
+ * @since 2023/1/22 22:11
+ */
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class TreeUtils {
+
+    /** 默认属性配置对象（根据前端树结构灵活调整名称） */
+    private static final TreeNodeConfig DEFAULT_CONFIG =
+        TreeNodeConfig.DEFAULT_CONFIG.setNameKey("title").setIdKey("key").setWeightKey("sort");
+
+    /**
+     * 树构建
+     *
+     * @param <T>
+     *            转换的实体 为数据源里的对象类型
+     * @param <E>
+     *            ID类型
+     * @param list
+     *            源数据集合
+     * @param nodeParser
+     *            转换器
+     * @return List
+     */
+    public static <T, E> List<Tree<E>> build(List<T> list, NodeParser<T, E> nodeParser) {
+        if (CollUtil.isEmpty(list)) {
+            return new ArrayList<>();
+        }
+        E parentId = (E)ReflectUtil.getFieldValue(list.get(0), DEFAULT_CONFIG.getParentIdKey());
+        return TreeUtil.build(list, parentId, DEFAULT_CONFIG, nodeParser);
+    }
+}