ant-design/components/tree/demo/line.md

order	title
5	zh-CN en-US 连接线 Tree with line

zh-CN

节点之间带连接线的树，常用于文件目录结构展示。

en-US

Tree with connected line between nodes.

import { Tree, Icon } from 'antd';

const { TreeNode } = Tree;

class Demo extends React.Component {
  onSelect = (selectedKeys, info) => {
    console.log('selected', selectedKeys, info);
  };

  render() {
    return (
      <Tree showLine defaultExpandedKeys={['0-0-0']} onSelect={this.onSelect}>
        <TreeNode title="parent 1" key="0-0">
          <TreeNode title="parent 1-0" key="0-0-0">
            <TreeNode title="leaf" key="0-0-0-0" />
            <TreeNode title="leaf" key="0-0-0-1" />
            <TreeNode title="leaf" key="0-0-0-2" />
          </TreeNode>
          <TreeNode title="parent 1-1" key="0-0-1">
            <TreeNode title="leaf" key="0-0-1-0" />
          </TreeNode>
          <TreeNode title="parent 1-2" key="0-0-2">
            <TreeNode title="leaf" key="0-0-2-0" />
            <TreeNode icon={<Icon type="form" />} title="leaf" key="0-0-2-1" />
          </TreeNode>
        </TreeNode>
      </Tree>
    );
  }
}

ReactDOM.render(<Demo />, mountNode);