content: package org.ruoyi.common.core.utils;
  
  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 lombok.AccessLevel;
  import lombok.NoArgsConstructor;
  import org.ruoyi.common.core.utils.reflect.ReflectUtils;
  
  import java.util.List;
  
  /**
   * 扩展 hutool TreeUtil 封装系统树构建
   *
   * @author Lion Li
   */
  @NoArgsConstructor(access = AccessLevel.PRIVATE)
  public class TreeBuildUtils extends TreeUtil {
  
      /**
       * 根据前端定制差异化字段
       */
      public static final TreeNodeConfig DEFAULT_CONFIG = TreeNodeConfig.DEFAULT_CONFIG.setNameKey("label");
  
      public static <T, K> List<Tree<K>> build(List<T> list, NodeParser<T, K> nodeParser) {
          if (CollUtil.isEmpty(list)) {
              return null;
          }
          K k = ReflectUtils.invokeGetter(list.get(0), "parentId");
          return TreeUtil.build(list, k, DEFAULT_CONFIG, nodeParser);
      }
  
  }
  