我正在尝试使用 JavaScript 将 JSON 文件转换为可以在 excel 中打开的 csv。
我有什么:
function exportToCsv(filename, rows) {
var processRow = function (row) {
var finalVal = '';
for (var j = 0; j < row.length; j++) {
var innerValue = row[j] === null ? '' : row[j].toString();
if (row[j] instanceof Date) {
innerValue = row[j].toLocaleString();
};
var result = innerValue.replace(/"/g, '""');
if (result.search(/("|,|\n)/g) >= 0)
result = '"' + result + '"';
if (j > 0)
finalVal += ',';
finalVal += result;
}
return finalVal + '\n';
};
var csvFile = '';
for (var i = 0; i < rows.length; i++) {
csvFile += processRow(rows[i]);
}
var blob = new Blob([csvFile], { type: 'text/csv;charset=utf-8;' });
if (navigator.msSaveBlob) { // IE 10+
navigator.msSaveBlob(blob, filename);
} else {
var link = document.createElement("a");
if (link.download !== undefined) { // feature detection
// Browsers that support HTML5 download attribute
var url = URL.createObjectURL(blob);
link.setAttribute("href", url);
link.setAttribute("download", filename);
link.style.visibility = 'hidden';
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
}
}
}
exportToCsv('export.csv', 'FILENAME.JSON')
FILENAME.JSON(非常详细的嵌套示例)
[{
"countyCode": 18,
"excludedFlag": null,
"fees": {
"annualTotalFees": 35.6,
"annualTotalFeesMail": 36.35,
"annualTotalFeesOnline": 38.35,
"biennialTotalFees": 71.2,
"biennialTotalFeesMail": 71.95,
"biennialTotalFeesOnline": 73.95,
"branchFeeFlag": false,
"delinquentFeeAmount": 5,
"mhBackTax": 0,
"mhBackTaxMonths": 0
},
"fileId": 876,
"id": "2398743-32403274-2398",
"messages": [
{
"messageCode": "RN2",
"messageText": "Plate must be replaced if a 2 year renewal is desired.",
"messageType": "I"
},
{
"messageCode": "RN40",
"messageText": "You must complete the affidavit on the reverse side or provide a copy of your Florida insurance identification card.",
"messageType": "I"
},
{
"messageCode": "RN41",
"messageText": "Insurance is on file.",
"messageType": "II"
}
],
"registrationDetail": {
"annualPlateReplacementFlag": false,
"arfCredit": 25.6,
"biennialPlateReplacementFlag": true,
"customerStopFlag": null,
"delinquentDate": "2018-02-11T00:00:00",
"expirationDate": "2018-01-09T00:00:00",
"foreignAddressFlag": false,
"honorayConsulPlateFlag": null,
"hovDecalNumber": null,
"hovDecalYear": null,
"hovExpirationDate": null,
"inventorySubtype": "RP",
"lastActivityCounty": 15,
"legislativePlateDueForReplacementFlag": false,
"licensePlateCode": "RPR",
"licensePlateNumber": "Plate",
"mailToAddressFlag": false,
"mailToCustomerNumber": null,
"mhLocationCode": null,
"militaryOwnerFlag": false,
"numberOfRegistrants": 1,
"onlineRenewalEligibilityFlag": true,
"pinNumber": 329874938,
"plateExpirationDate": "2018-03-18T00:00:00",
"plateIssueDate": "2008-09-18T00:00:00",
"possibleNgExemptionFlag": false,
"registrationNumber": 3945874398,
"registrationOnlyFlag": null,
"registrationType": "R",
"registrationUse": "PR",
"renewalCountyCode": 16,
"rentalParkFlag": null,
"seminoleMiccosukeeIndianFlag": false,
"taxCollectorRenewalEligibilityFlag": true,
"vehicleClassCode": 1
},
"registrationOwners": [
{
"customer": {
"addresses": [
{
"addressType": "R",
"city": "BRADENTON",
"countryCode": "US",
"countyCode": 16,
"foreignPostalCode": null,
"state": "FL",
"streetAddress": "24545 6th ave w",
"zipCode": 34205,
"zipPlus": null
},
{
"addressType": "M",
"city": "BRADENTON",
"countryCode": "US",
"countyCode": 16,
"foreignPostalCode": null,
"state": "FL",
"streetAddress": "24545 6th ave w",
"zipCode": 34205,
"zipPlus": 8344
}
],
"companyName": null,
"customerNumber": 3490436,
"customerStopFlag": false,
"customerType": "I",
"dateOfBirth": "1971-01-09T00:00:00",
"dlExpirationDate": "2025-01-09T00:00:00",
"dlRenewalEligibilityFlag": true,
"driverLicenseNumber": "N0932433902",
"emailAddress": null,
"feidNumber": null,
"firstName": "Test",
"lastName": "Name",
"middleName": "Name",
"militaryExemptionFlag": false,
"nameSuffix": null,
"sex": "F"
},
"registrationOwnershipNumber": 1
}
],
"shippingAddress": {
"address": {
"addressType": "S",
"city": "BRADENTON",
"countryCode": "US",
"countyCode": 15,
"foreignPostalCode": null,
"state": "FL",
"streetAddress": "24545 6th ave w",
"zipCode": 34205,
"zipPlus": 8344
},
"shippingCompanyName": null,
"shippingName1": "Test Name",
"shippingName2": null
},
"stops": null,
"vehicle": {
"address": null,
"bodyCode": "4D",
"brakeHorsePower": null,
"cubicCentimeters": null,
"grossWeight": null,
"insuranceAffidavitCode": null,
"leaseOwnerFlag": false,
"lengthFeet": null,
"lengthInches": null,
"majorColorCode": "GLD",
"makeCode": "CHEV",
"minorColorCode": null,
"netWeight": 3200,
"numberOfAxles": null,
"ownerUnitNumber": null,
"titleNumber": 32434324,
"vehicleIdentificationNumber": "1F5ZD5EU5BF32434234",
"vehicleNumber": 324334,
"vehicleType": "AU",
"vesselCode": null,
"vesselManufacturerDesc": null,
"vesselResidentStatus": "Y",
"vesselWaterType": null,
"widthFeet": null,
"widthInches": null,
"yearMake": 2011
}
}
]
我正在尝试弄清楚如何将 json 文件放到底部显示 FILENAME.JSON 的地方。
我的最终目标是允许用户选择一个文件以将“大”json 文件转换为 csv 文件。每个月都会有一个新的 json 文件，所以我试图让用户轻松选择要转换的文件。有没有一种简单的方法可以绑定(bind)此 JavaScript 以允许用户选择文件？
如有任何帮助，我们将不胜感激。
编辑(我在下面尝试的方法还没有奏效。它像在做某事一样旋转，但从不下载或创建文件。)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>json2csv</title>
<meta id="viewport" name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<meta name="apple-mobile-web-app-capable" content="yes">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js" crossorigin="anonymous"></script>
</head>
<body>
<div id="content"></div>
</body>
<script type="text/javascript">
fetch('http://path/to/json/file')
.then(function(response) {
function flatObjectToString(obj){
var s = ""
Object.keys(obj).map(key=>{
if(obj[key] === null){
s+= key +":"
}else if(obj[key].toLocaleDateString){
s+=key+": " +obj[key].toLocaleDateString() +"\n"
}else if(obj[key] instanceof Array){
s+= key+":\n" +listToFlatString(obj[key])
}else if(typeof obj[key] == "object"){
s+= key+":\n" +flatObjectToString(obj[key])
}else{
s+= key+":" +obj[key]
}
s+= "\n"
})
return s
}
function listToFlatString(list) {
var s = "";
list.map(item => {
Object.keys(item).map(key => {
s+="\n"
if (item[key] instanceof Array) {
s += key + "\n" + listToFlatString(item[key])
}else if(typeof item[key] == "object" && item[key] !== null){
s+= key+": " + flatObjectToString(item[key])
} else {
s += key + ": " + (item[key] === null ? "" : item[key].toLocaleDateString ? item[key].toLocaleDateString : item[key].toString())
}
})
})
return s;
}
function flatten(object, addToList, prefix) {
Object.keys(object).map(key => {
if (object[key] === null) {
addToList[prefix + key] = ""
} else
if (object[key] instanceof Array) {
addToList[prefix + key] = listToFlatString(object[key])
} else if (typeof object[key] == 'object' && !object[key].toLocaleDateString) {
flatten(object[key], addToList, prefix + key + '.')
}else{
addToList[prefix + key] = object[key]
}
})
return addToList
}
exportToCsv("download.csv", data.map(record=>flatten(record, {}, '')))
})
</script>
</html>
最佳答案
如果您只想删除一个 JSON 文件，您有几个选择:
您可以粘贴 JSON 结构。
JSON.parse(`{"name":"Sample","Age":1}`);可以使用fetch加载文件
fetch('http://example.com/mylist.json') .then(function(response) { return exportToCsv("myfilename", response.json()); })您可以使用它来展平列表:
function flatObjectToString(obj){ var s = "" Object.keys(obj).map(key=>{ if(obj[key] === null){ s+= key +":" }else if(obj[key].toLocaleDateString){ s+=key+": " +obj[key].toLocaleDateString() +"\n" }else if(obj[key] instanceof Array){ s+= key+":\n" +listToFlatString(obj[key]) }else if(typeof obj[key] == "object"){ s+= key+":\n" +flatObjectToString(obj[key]) }else{ s+= key+":" +obj[key] } s+= "\n" }) return s } function listToFlatString(list) { var s = ""; list.map(item => { Object.keys(item).map(key => { s+="\n" if (item[key] instanceof Array) { s += key + "\n" + listToFlatString(item[key]) }else if(typeof item[key] == "object" && item[key] !== null){ s+= key+": " + flatObjectToString(item[key]) } else { s += key + ": " + (item[key] === null ? "" : item[key].toLocaleDateString ? item[key].toLocaleDateString : item[key].toString()) } }) }) return s; } function flatten(object, addToList, prefix) { Object.keys(object).map(key => { if (object[key] === null) { addToList[prefix + key] = "" } else if (object[key] instanceof Array) { addToList[prefix + key] = listToFlatString(object[key]) } else if (typeof object[key] == 'object' && !object[key].toLocaleDateString) { flatten(object[key], addToList, prefix + key + '.') }else{ addToList[prefix + key] = object[key] } }) return addToList } exportToCsv("download.csv", data.map(record=>flatten(record, {}, '')))
关于javascript - 使用 JavaScript 将 JSON 文件转换为 CSV，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49412859/