const aa = [
  {
    id: 'ff8080818698fe5001869af6e4a40ada',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: '',
    name: '完善、改造和维护安全防护设施设备支出',
    code: 'A1',
    indexs: 1,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: true,
    iconSkin: 'defalut',
    description: '',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40ae9',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: '',
    name: '配备、维护、保养应急救援器材、设备支出和应急演练',
    code: 'A2',
    indexs: 2,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: true,
    iconSkin: 'defalut',
    description: '0',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40af7',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: '',
    name: '重大危险源和事故隐患评估、监控和整改支出',
    code: 'A3',
    indexs: 3,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: true,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40afe',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: '',
    name: '安全生产检查、评价、咨询和标准化建设支出',
    code: 'A4',
    indexs: 4,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: true,
    iconSkin: 'defalut',
    description: '0',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b01',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: '',
    name: '配备和更新现场作业人员安全防护用品支出',
    code: 'A5',
    indexs: 5,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: true,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b03',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: '',
    name: '安全生产宣传、教育、培训支出',
    code: 'A6',
    indexs: 6,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: true,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b05',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: '',
    name: '安全生产使用的新技术、新标准、新工艺、新装备的推广应用支出',
    code: 'A7',
    indexs: 7,
    products: [],
    amount: 0.0,
    percentage: 0.04,
    isChild: true,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b07',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: '',
    name: '安全设施及特种设备检测检验支出',
    code: 'A8',
    indexs: 8,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: true,
    iconSkin: 'defalut',
    description: '',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b09',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: '',
    name: '其他安全生产费用支出',
    code: 'A9',
    indexs: 9,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: true,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40adb',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '安全标志',
    code: 'A1.1',
    indexs: 1,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40aea',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '警示灯具',
    code: 'A1.2',
    indexs: 2,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40af8',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '防护栏杆',
    code: 'A1.3',
    indexs: 3,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40aff',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '防护围栏、围挡',
    code: 'A1.4',
    indexs: 4,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b02',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '安全通道',
    code: 'A1.5',
    indexs: 5,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b04',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '安全防护网',
    code: 'A1.6',
    indexs: 6,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b06',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '隧道逃生管道、救生管道',
    code: 'A1.7',
    indexs: 7,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b08',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '有毒有害气体检测仪',
    code: 'A1.8',
    indexs: 8,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b0a',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '爆炸物专用存储箱',
    code: 'A1.9',
    indexs: 9,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b0b',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '供配电及临时用电安全保护措施',
    code: 'A1.10',
    indexs: 10,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b0c',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '防地质灾害设施设备',
    code: 'A1.11',
    indexs: 11,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
  {
    id: 'ff8080818698fe5001869af6e4a40b0d',
    planId: 'ff8080818698fe5001869af6e4a20ad9',
    parentId: 'ff8080818698fe5001869af6e4a40ada',
    name: '其他临时的安全防护设施设备',
    code: 'A1.12',
    indexs: 12,
    products: [],
    amount: 0.0,
    percentage: 0.0,
    isChild: false,
    iconSkin: 'defalut',
    description: 'null',
    createDate: '2023-03-01 10:18:37',
    updateDate: '2023-03-01 10:18:37',
  },
];

function arrayToTree(data) {
  let map = {};
  debugger;
  for (let item of data) {
    map[item.id] = item;
  }
  let result = []; //存放数组
  for (let item of data) {
    item.children = []; //给每个数组添加一个空children
    if (!item.parentId) {
      result.push(item); //最上级的标签
    } else {
      //相当于用这个 parentId 当做父Id去查找对比查找数据
      let parent = map[item.parentId];
      //添加到刚刚定义 children 数组中去
      parent.children.push(item);
    }
  }
  return result;
}

console.log(JSON.stringify(arrayToTree(aa)));