如何在react中设置单选按钮的默认值？

<input type="radio" name="gender" value="male" defaultChecked={true} /> Male
<input type="radio" name="gender" value="female" defaultChecked={false} /> Female

class RadioButton extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      gender: 'male' // 默认选中的值
    };
  }

  handleChange = (event) => {
    this.setState({
      gender: event.target.value
    });
  }

  render() {
    return (
      <div>
        <input type="radio" name="gender" value="male" checked={this.state.gender === 'male'} onChange={this.handleChange} /> Male
        <input type="radio" name="gender" value="female" checked={this.state.gender === 'female'} onChange={this.handleChange} /> Female
      </div>
    );
  }
}