[英]How to read data from a local XLSX file and save it into an Object/Array
[英]Read files from directory and save to array of object
我有一个员工税务档案的目录。 每个文件都有一个文件名作为员工代码。 我正在读取每个文件并提取一些组件并保存到一组员工对象中。
const readline = require('readline');
let empArr = [];
function readFiles(dirname) {
fs.readdir(dirname, async function (err,filenames) {
if(err) {
return err;
}
for await (file of filenames) {
const filePath = path.join(__dirname,directoryPath,file);
const readStream = fs.createReadStream(filePath);
const fileContent = readline.createInterface({
input: readStream
});
let employeeObj = {
empId : '',
TotalEarning:'',
ProfessionalTax:0,
GrossIncome:0,
isDone:false
};
fileContent.on('line', function(line) {
if(!employeeObj.empId && line.includes("Employee:")) {
const empId = line.replace('Employee: ','').split(" ")[0];
employeeObj.empId = empId;
}
else if(line.includes('Total Earnings')) {
const amount = line.replace(/[^0-9.]/g,'');
employeeObj.TotalEarning = amount;
}
else if(line.includes('Profession Tax')) {
const amount = line.split(" ").pop() || 0;
employeeObj.ProfessionalTax = amount;
}
else if(line.includes('Gross Income')) {
const amount = line.replace(/[^0-9.]/g,'');
employeeObj.GrossIncome = amount ||0;
}
else if(line.includes('finance department immediately')) {
employeeObj.isDone =true;
empArr.push(employeeObj);
}
});
fileContent.on('close', function() {
fileContent.close();
});
}
})
}
readFiles(directoryPath);
我无法获得 empArr。 拿到数组后需要保存到excel。 这部分我将在获取员工对象数组后尝试。
在阅读了几篇关于闭包和承诺的文章后,我得到了它的工作。 以下代码适用于我,并向我发送已处理的员工数组。
const directoryPath = './tax/';
function readFiles(dirname) {
fs.readdir(dirname, async function (err,filenames) {
if(err) {
return err;
}
let promiseArr = filenames.map( file=> {
return new Promise((resolve)=>{
processFile(file, resolve)
})
});
Promise.all(promiseArr).then((ret)=>console.log(ret));
})
}
function processFile(file, callback) {
const filePath = path.join(__dirname,directoryPath,file);
const readStream = fs.createReadStream(filePath);
const fileContent = readline.createInterface({
input: readStream
});
let employeeObj = {
empId : '',
TotalEarning:'',
ProfessionalTax:0,
GrossIncome:0,
isDone:false
};
fileContent.on('line', function(line) {
if(!employeeObj.empId && line.includes("Employee:")) {
const empId = line.replace('Employee: ','').split(" ")[0];
employeeObj.empId = empId;
}
else if(line.includes('Total Earnings')) {
const amount = line.replace(/[^0-9.]/g,'');
employeeObj.TotalEarning = amount;
}
else if(line.includes('Profession Tax')) {
const amount = line.split(" ").pop() || 0;
employeeObj.ProfessionalTax = amount;
}
else if(line.includes('Gross Income')) {
const amount = line.replace(/[^0-9.]/g,'');
employeeObj.GrossIncome = amount ||0;
}
else if(line.includes('finance department immediately')) {
employeeObj.isDone = true;
return callback(employeeObj);
}
});
fileContent.on('close', function() {
fileContent.close();
});
}
readFiles(directoryPath);
当然,代码可以进一步改进。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.