当某些字段需要嵌套时，将平面CSV转换为JSON

name,age,city,country
John,25,New York,USA
Alice,30,San Francisco,USA

const csv = `name,age,city,country
John,25,New York,USA
Alice,30,San Francisco,USA`;

const lines = csv.split('\n');
const headers = lines[0].split(',');
const jsonData = [];

for (let i = 1; i < lines.length; i++) {
  const currentLine = lines[i].split(',');
  const obj = {};

  for (let j = 0; j < headers.length; j++) {
    obj[headers[j]] = currentLine[j];
  }

  jsonData.push(obj);
}

const jsonResult = JSON.stringify(jsonData);
console.log(jsonResult);

[
  {
    "name": "John",
    "age": "25",
    "city": "New York",
    "country": "USA"
  },
  {
    "name": "Alice",
    "age": "30",
    "city": "San Francisco",
    "country": "USA"
  }
]