读json文件
'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);
虽然这是我们想要写入的数据,但数据是一行字符串的形式,这对我们来说很难读取。
如果您希望序列化的JSON是人类可读的,那么更改JSON。Stringify函数:
let data = JSON.stringify(student, null, 2);
json 转为 csv
// 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转为json
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);
}
})();
参考:
https://attacomsian.com/blog/nodejs-convert-json-to-csv
作者:
iTech
微信公众号: cicdops
github:
https://github.com/cicdops/cicdops
Original: https://www.cnblogs.com/itech/p/13210053.html
Author: iTech
Title: nodejs读写json文件
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