nodejs怎么读写json文件？方法介绍

'use strict';

const fs = require('fs');

let rawdata = fs.readFileSync('student.json');
let student = JSON.parse(rawdata);
console.log(student);

写json文件：
'use strict';

const fs = require('fs');

let student = { 
    name: 'Mike',
    age: 23, 
    gender: 'Male',
    department: 'English',
    car: 'Honda' 
};
 
let data = JSON.stringify(student);
fs.writeFileSync('student-2.json', data);

// require json-2-csv module
const converter = require('json-2-csv');
const fs = require('fs');

// read JSON from a file
const todos = JSON.parse(fs.readFileSync('todos.json'));

// convert JSON array to CSV string
(async () => {
    try {
        const csv = await converter.json2csvAsync(todos);

        // print CSV string
        console.log(csv);

        // write CSV to a file
        fs.writeFileSync('todos.csv', csv);

    } catch (err) {
        console.log(err);
    }
})();

csv第一行为key，例如：  id,name,email,country,age
// require csvtojson module
const CSVToJSON = require('csvtojson');

// convert users.csv file to JSON array
(async () => {
    try {
        const users = await CSVToJSON().fromFile('users.csv');

        // log the JSON array
        console.log(users);

    } catch (err) {
        console.log(err);
    }
})();