基于Node.js进行CSV、JSON以及Excel的数据处理

const fs = require('fs');

const content = fs.readFileSync('data.json', 'utf-8');
const data = JSON.parse(content);

console.log(data);

const fs = require('fs');

const data = { name: 'Node.js', type: 'runtime' };

fs.writeFileSync(
  'output.json',
  JSON.stringify(data, null, 2),
  'utf-8'
);

const fs = require('fs');
const csv = require('csv-parser');

fs.createReadStream('data.csv')
  .pipe(csv())
  .on('data', row => {
    console.log(row);
  })
  .on('end', () => {
    console.log('CSV 读取完成');
  });

const fs = require('fs');
const { stringify } = require('csv-stringify');

const records = [
  { name: 'Alice', age: 25 },
  { name: 'Bob', age: 30 }
];

stringify(records, { header: true }, (err, output) => {
  fs.writeFileSync('output.csv', output);
});

const XLSX = require('xlsx');

const workbook = XLSX.readFile('data.xlsx');
const sheetName = workbook.SheetNames[0];
const sheet = workbook.Sheets[sheetName];

const jsonData = XLSX.utils.sheet_to_json(sheet);
console.log(jsonData);

const XLSX = require('xlsx');

const data = [
  { name: 'Node', score: 95 },
  { name: 'JavaScript', score: 90 }
];

const worksheet = XLSX.utils.json_to_sheet(data);
const workbook = XLSX.utils.book_new();

XLSX.utils.book_append_sheet(workbook, worksheet, 'Sheet1');
XLSX.writeFile(workbook, 'report.xlsx');