Node.js-如何在csv中提取特定列

Question

I need to extract specific column in CSV file and create an output file as index.conf . In this case I need to extract column under Service Manager and System Owner and have them as an output file as index.conf . Anyone can help?

Image of my CSV:

Client|*Description|Environment|LifeCycle|Service Manager|System Owner|
xxxxxx| xxxxxx     |Production |Active   |Mark Wright    |David harvey| 
xxxxxx| xxxxxx     |Production |Active   |John Stone     |  

I'm not a developer but just taking over some part of the job scope including maintaining a web site.

Answer 1

You can use csv npm package for this. It helps to generate, parse, transform and stringify CSV data. It is a widely used npm package.

Answer 2

1. Use csvtojson library to convert csv to JSON format.

   npm i --save csvtojson

2. Using JSON parsed from the above step, you can create .conf file as per your requirements.

Refer to following code snippet for the implementation.

In the following program, I'm considering only the first record of csv. You can write your own logic as per your requirements.

index.js

// import csvtojson package
const csvtojson = require('csvtojson');
// import fs pacakge to write .conf file
const fs = require('fs')

/**
 * read csv file and save .conf file
 * @param {*} filePath path to the csv file
 */
async function readCSVAndSaveConf(filePath){
    // read csv file on the given path and get csv as json
    const parsedCSV = await readCSV(filePath);
    // save conf as per first record of csv. ** you can write your own logic
    saveConf(parsedCSV[0])
}

/**
 * read csv on given path
 * @param {*} filePath path to csv file
 */
function readCSV(filePath){
return csvtojson({ delimiter: '|' }).fromFile(filePath); 
}

/**
 * save conf file as per json
 * @param {*} jsonConfig 
 */
function saveConf(jsonConfig){
    // create .conf content
    const conf=`# This is conf file
    ServiceManager=${jsonConfig['Service Manager']}
    ServiceOwner=${jsonConfig['System Owner']}`
    // save .conf to the file
    fs.writeFileSync(__dirname+'/index.conf', conf);
}

// path to csv
const filePath="./input.csv"

// read csv and save conf
readCSVAndSaveConf(filePath)
.then(()=>console.log("completed"))
.catch(err=>console.error(err))

input.csv

Client|*Description|Environment|LifeCycle|Service Manager|System Owner|
xxxxxx| xxxxxx     |Production |Active   |Mark Wright    |David harvey| 
xxxxxx| xxxxxx     |Production |Active   |John Stone     |  

index.conf

ServiceManager=Mark Wright
ServiceOwner=David harvey