将文本文件转成json数据并输出。

Question

文本文件格式如下：北京 2河北 3河北-邯郸 301河北-保定 302河北-邢台 303山东 4山东-青岛 401山东-烟台 402转换成类似如下的json，我只要该结果const treeData = [{  label: '河北',  value: '3',  key: '3',  children: [{    label: '邯郸',    value: '301',    key: '302',   }, {    label: '保定',    value: '302',    key: '302',   }], }]

Answer 1

没做容错, 格式必须按上面的格式

var str = `北京 2河北 3河北-邯郸 301河北-保定 302河北-邢台 303山东 4山东-青岛 401山东-烟台 402`;var arrStr = str.split("\n");var result = [];
arrStr.map(i => {  let = item = i.split(" ");  if (i.indexOf("-") == -1) {
    result.push({      label: item[0],
      value: item[1],      key: item[1],
      children: []
    })
  } else {    let city = item[0].split("-");    let cur = result.find(j => j.label == city[0])
    cur.children.push({      label: city[1],
      value: item[1],      key: item[1],
    })
  }
})
console.log(result)
console.log(JSON.stringify(result))

[
{"label":"北京","value":"2","key":"2","children":[]},
{"label":"河北","value":"3","key":"3","children":[
    {"label":"邯郸","value":"301","key":"301"},
    {"label":"保定","value":"302","key":"302"},
    {"label":"邢台","value":"303","key":"303"}
]},
{"label":"山东","value":"4","key":"4","children":[
    {"label":"青岛","value":"401","key":"401"},
    {"label":"烟台","value":"402","key":"402"}
]}
]