如何在Highcharts中使用树图来展示数据

// 数据源
var data = {
  name: 'Root Node',
  children: [{
    name: 'Node 1',
    children: [{
      name: 'Node 1.1',
      value: 10
    }, {
      name: 'Node 1.2',
      value: 20
    }]
  }, {
    name: 'Node 2',
    children: [{
      name: 'Node 2.1',
      value: 15
    }, {
      name: 'Node 2.2',
      value: 25
    }]
  }]
};

// 创建树图
Highcharts.chart('container', {
  chart: {
    type: 'tree'
  },
  series: [{
    data: [data],
    layoutAlgorithm: 'squarified',
    allowDrillToNode: true,
    animationLimit: 1000
  }],
  title: {
    text: '树图'
  },
  tooltip: {
    style: {
      pointerEvents: 'auto'
    },
    formatter: function() {
      return this.point.name + ': ' + this.point.value;
    }
  },
  plotOptions: {
    series: {
      cursor: 'pointer',
      point: {
        events: {
          click: function() {
            console.log('点击节点:', this.point.name);
          }
        }
      }
    }
  }
});