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# 从数据直接生成
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- order: 1
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使用 `treeData` 把 JSON 数据直接生成树结构。
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---
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````jsx
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import { TreeSelect } from 'antd';
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const treeData = [{
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label: '节点一',
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value: '0-0',
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key: '0-0',
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children: [{
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label: '子节点一',
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value: '0-0-1',
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key: '0-0-1',
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}, {
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label: '子节点二',
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value: '0-0-2',
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key: '0-0-2',
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}],
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}, {
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label: '节点二',
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value: '0-1',
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key: '0-1',
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}];
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const Demo = React.createClass({
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getInitialState() {
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return {
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value: '',
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};
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},
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onChange(value) {
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console.log(arguments);
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this.setState({ value });
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},
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render() {
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return (
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<TreeSelect style={{ width: 300 }}
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value={this.state.value}
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dropdownMenuStyle={{ maxHeight: 400, overflow: 'auto' }}
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treeData={treeData}
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placeholder="请选择"
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treeDefaultExpandAll
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onChange={this.onChange} />
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);
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},
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});
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ReactDOM.render(<Demo />, mountNode);
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````
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