示例代码如: importlombok.Getter;importjava.util.ArrayList;importjava.util.List;@GetterclassTreeNode{intid;List<TreeNode>children;publicTreeNode(intid) {this.id=id;this.children=newArrayList<>(); } }publicclassTreeFlattener{publicstaticList<TreeNode>flattenTrees(List<TreeNode>rootNodes) {List<Tree...
= null && !tree.getChildren().isEmpty()) { for (Tree<Long> child : tree.getChildren()) { countNodes(child, currentLevel + 1, levelCounts); } } } public static void main(String[] args) { // 示例数据,根据实际需求构建 List<Tree<Long>> trees = ......
// 构建树 List<TreeNode<String>> nodeList = CollUtil.newArrayList(); List<Tree<String>> treeList = TreeUtil.build(nodeList, "0"); 如何将树转成list?代码如 //树转list List<Tree<String>> treeList; List<TreeNode<String>> nodeList = TreeUtil. flatTree(treeList);Member looly commented Oct...
因为两个Tree是平级的,再没有上层节点,因此为List。 自定义字段名: //配置TreeNodeConfig treeNodeConfig =newTreeNodeConfig();//自定义属性名 都要默认值的treeNodeConfig.setWeightKey("order"); treeNodeConfig.setIdKey("rid");//最大递归深度treeNodeConfig.setDeep(3);//转换器List<Tree<String>> ...
//1.配置树节点信息,指定key,可直接使用默认的keyTreeNodeConfig config =newTreeNodeConfig();//2.查询数据List<AreaCode> areaCodes =areaCodeDao.selectAll();//3.转为树结构,其中rootId参数代表根节点的父级id值List<Tree<String>> treeList = TreeUtil.build(areaCodes,"0", config, ((object, tree...
setIdKey("id"); treeNodeConfig.setWeightKey("pos"); treeNodeConfig.setParentIdKey("parentId"); treeNodeConfig.setChildrenKey("children"); // 最大递归深度 // treeNodeConfig.setDeep(5); treeNodeConfig.setNameKey("name"); //转换器 List<Tree<String>> treeNodes = TreeUtil.build(api...
//转换为字符串inta=1;StringaStr=Convert.toStr(a);//转换为指定类型数组String[]b={"1","2","3","4"};Integer[]bArr=Convert.toIntArray(b);//转换为日期对象StringdateStr="2017-05-06";Datedate=Convert.toDate(dateStr);//转换为列表String[]strArr={"a","b","c","d"};List<String>...
TreeNodeConfig treeNodeConfig = new TreeNodeConfig(); treeNodeConfig.setIdKey("id"); //主键 treeNodeConfig.setDeep(10); // 最大递归深度 treeNodeConfig.setParentIdKey("parentId"); //父Id //转换器 menuList为业务返回的List List<Tree<String>> treeNodes = TreeUtil.build(menuList, "0"...
我们可以使用TreeUtil的build方法将该列表转换为树结构。 classNode{ privateStringid; privateStringparentId; // getter和setter省略... } List<Node>nodeList=newArrayList<>(); //假设nodeList中包含了一些节点数据 List<Node>tree=(nodeList,"root"); 在上述例子中,我们将nodeList转换成了以”root”作为根节点...
}).collect(Collectors.toList());//配置TreeNodeConfig treeNodeConfig =newTreeNodeConfig();//自定义属性名(修改默认名称)treeNodeConfig.setWeightKey("sortOrder"); treeNodeConfig.setChildrenKey("childrenNode");//最大递归深度treeNodeConfig.setDeep(1);//转换器List<Tree<String>> treeNodes = Tree...