Nodejs 中的 JSON 到 CSV/Excel答案

【问题标题】：JSON to CSV/Excel in NodejsNodejs 中的 JSON 到 CSV/Excel
【发布时间】：2022-01-31 22:19:37
【问题描述】：

我正在尝试转换 JSON：

结果： console.log((${JSON.stringify(results)});


[
[{"field":"StudentID","value":"A"},{"field":"Total Marks","value":"27853"}],[{"field":"StudentID","value":"B"},{"field":"Total Marks","value":"14337"}],[{"field":"StudentID","value":"C"},{"field":"Total Marks","value":"1324"}],[{"field":"StudentID","value":"D"},{"field":"Total Marks","value":"362"}],[{"field":"StudentID","value":"E"},{"field":"Total Marks","value":"209"}]]

到 .csv 文件或 excel 文件并下载

Student ID  Total Marks
A           27853
B           14337
C           1324
D           362
E           209

有人可以提供一个 js 代码的 sn-p 来帮助实现这个吗？

我尝试了什么：

const json2csvParser = new Parser();
            results.forEach(element => {
                const csv = json2csvParser.parse(element);
                console.log(csv);
            });
            const csv = json2csvParser.parse(results);
            console.log(csv);

这只是在控制台中打印为：

"field","value"
"Student ID","A"
"Total Marks","27853"
"field","value"
"Student ID","B"
"Total Marks","14337"
"field","value"
"Student ID","C"
"Total Marks","1324"
"field","value"
"Student ID","D"
"Total Marks","362"
"field","value"
"Student ID","E"
"Total Marks","209"

【问题讨论】：

很确定这是一个已解决的问题，您已经搜索了什么？

标签： javascript node.js csv arraylist json2csv

【解决方案1】：

下载 csv-parser npm 包。

npm i -s csv-parser

供下载；

const fs = require("fs");
fs.writeFileSync("demo.csv", csv);
console.log("Done!");

js页面运行基础教程；

// (A) DATA ARRAY
var data = [
    ["Alpha", "Beta"],
    ["Charlie", "Delta"],
    ["Echo", "Foxtrot"]
  ];
  
  // (B) WRITE TO FILE
  const fs = require("fs");
  const stream = fs.createWriteStream("demoC.csv");
  for (let i of data) { stream.write(i.join(",") + "\r\n"); }
  stream.end();
  console.log("Done!");

【讨论】：