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First, your JSON has nested objects, so it normally cannot be directly converted to CSV. You need to change that to something like this: { "pk": 22, "model": "auth. permission", "codename": "add_logentry", "content_type": 8, "name": "Can add log entry" }, ......]
To convert JSON to CSV in Python, use the pandas to_csv() function. The to_csv() is a Pandas library function that writes objects to a comma-separated values (csv) file. The first step to convert json to csv is to read json data using the Pandas read_json() function and then convert it to csv using to_csv() function.
A more elegant way to convert json to csv is to use the map function without any framework:
var json = json3.items
var fields = Object.keys(json[0])
var replacer = function(key, value) { return value === null ? '' : value }
var csv = json.map(function(row){
return fields.map(function(fieldName){
return JSON.stringify(row[fieldName], replacer)
}).join(',')
})
csv.unshift(fields.join(',')) // add header column
csv = csv.join('\r\n');
console.log(csv)
Output:
title,description,link,timestamp,image,embed,language,user,user_image,user_link,user_id,geo,source,favicon,type,domain,id
"Apple iPhone 4S Sale Cancelled in Beijing Amid Chaos (Design You Trust)","Advertise here with BSA Apple cancelled its scheduled sale of iPhone 4S in one of its stores in China’s capital Beijing on January 13. Crowds outside the store in the Sanlitun district were waiting on queues overnight. There were incidents of scuffle between shoppers and the store’s security staff when shoppers, hundreds of them, were told that the sales [...]Source : Design You TrustExplore : iPhone, iPhone 4, Phone","http://wik.io/info/US/309201303","1326439500","","","","","","","","","wikio","http://wikio.com/favicon.ico","blogs","wik.io","2388575404943858468"
"Apple to halt sales of iPhone 4S in China (Fame Dubai Blog)","SHANGHAI – Apple Inc said on Friday it will stop selling its latest iPhone in its retail stores in Beijing and Shanghai to ensure the safety of its customers and employees. Go to SourceSource : Fame Dubai BlogExplore : iPhone, iPhone 4, Phone","http://wik.io/info/US/309198933","1326439320","","","","","","","","","wikio","http://wikio.com/favicon.ico","blogs","wik.io","16209851193593872066"
Use this less dense syntax and also JSON.stringify to add quotes to strings while keeping numbers unquoted:
const items = json3.items
const replacer = (key, value) => value === null ? '' : value // specify how you want to handle null values here
const header = Object.keys(items[0])
const csv = [
header.join(','), // header row first
...items.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(','))
].join('\r\n')
console.log(csv)
Ok I finally got this code working:
<html>
<head>
<title>Demo - Covnert JSON to CSV</title>
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript" src="https://github.com/douglascrockford/JSON-js/raw/master/json2.js"></script>
<script type="text/javascript">
// JSON to CSV Converter
function ConvertToCSV(objArray) {
var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;
var str = '';
for (var i = 0; i < array.length; i++) {
var line = '';
for (var index in array[i]) {
if (line != '') line += ','
line += array[i][index];
}
str += line + '\r\n';
}
return str;
}
// Example
$(document).ready(function () {
// Create Object
var items = [
{ name: "Item 1", color: "Green", size: "X-Large" },
{ name: "Item 2", color: "Green", size: "X-Large" },
{ name: "Item 3", color: "Green", size: "X-Large" }];
// Convert Object to JSON
var jsonObject = JSON.stringify(items);
// Display JSON
$('#json').text(jsonObject);
// Convert JSON to CSV & Display CSV
$('#csv').text(ConvertToCSV(jsonObject));
});
</script>
</head>
<body>
<h1>
JSON</h1>
<pre id="json"></pre>
<h1>
CSV</h1>
<pre id="csv"></pre>
</body>
</html>
Thanks alot for all the support to all the contributors.
Praney
Very nice solution by praneybehl, but if someone wants to save the data as a csv file and using a blob method then they can refer this:
function JSONToCSVConvertor(JSONData, ReportTitle, ShowLabel) {
//If JSONData is not an object then JSON.parse will parse the JSON string in an Object
var arrData = typeof JSONData != 'object' ? JSON.parse(JSONData) : JSONData;
var CSV = '';
//This condition will generate the Label/Header
if (ShowLabel) {
var row = "";
//This loop will extract the label from 1st index of on array
for (var index in arrData[0]) {
//Now convert each value to string and comma-seprated
row += index + ',';
}
row = row.slice(0, -1);
//append Label row with line break
CSV += row + '\r\n';
}
//1st loop is to extract each row
for (var i = 0; i < arrData.length; i++) {
var row = "";
//2nd loop will extract each column and convert it in string comma-seprated
for (var index in arrData[i]) {
row += '"' + arrData[i][index] + '",';
}
row.slice(0, row.length - 1);
//add a line break after each row
CSV += row + '\r\n';
}
if (CSV == '') {
alert("Invalid data");
return;
}
//this trick will generate a temp "a" tag
var link = document.createElement("a");
link.id = "lnkDwnldLnk";
//this part will append the anchor tag and remove it after automatic click
document.body.appendChild(link);
var csv = CSV;
blob = new Blob([csv], { type: 'text/csv' });
var csvUrl = window.webkitURL.createObjectURL(blob);
var filename = (ReportTitle || 'UserExport') + '.csv';
$("#lnkDwnldLnk")
.attr({
'download': filename,
'href': csvUrl
});
$('#lnkDwnldLnk')[0].click();
document.body.removeChild(link);
}
I just wanted to add some code here for people in the future since I was trying to export JSON to a CSV document and download it.
I use $.getJSON to pull json data from an external page, but if you have a basic array, you can just use that.
This uses Christian Landgren's code to create the csv data.
$(document).ready(function() {
var JSONData = $.getJSON("GetJsonData.php", function(data) {
var items = data;
const replacer = (key, value) => value === null ? '' : value; // specify how you want to handle null values here
const header = Object.keys(items[0]);
let csv = items.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(','));
csv.unshift(header.join(','));
csv = csv.join('\r\n');
//Download the file as CSV
var downloadLink = document.createElement("a");
var blob = new Blob(["\ufeff", csv]);
var url = URL.createObjectURL(blob);
downloadLink.href = url;
downloadLink.download = "DataDump.csv"; //Name the file here
document.body.appendChild(downloadLink);
downloadLink.click();
document.body.removeChild(downloadLink);
});
});
Edit: It's worth noting that JSON.stringify will escape quotes in quotes by adding \". If you view the CSV in excel, it doesn't like that as an escape character.
You can add .replace(/\\"/g, '""') to the end of JSON.stringify(row[fieldName], replacer) to display this properly in excel (this will replace \" with "" which is what excel prefers).
Full Line: let csv = items.map(row => header.map(fieldName => (JSON.stringify(row[fieldName], replacer).replace(/\\"/g, '""'))).join(','));
If anyone wanted to download it as well.
Here is an awesome little function that will convert an array of JSON objects to csv, then download it.
downloadCSVFromJson = (filename, arrayOfJson) => {
// convert JSON to CSV
const replacer = (key, value) => value === null ? '' : value // specify how you want to handle null values here
const header = Object.keys(arrayOfJson[0])
let csv = arrayOfJson.map(row => header.map(fieldName =>
JSON.stringify(row[fieldName], replacer)).join(','))
csv.unshift(header.join(','))
csv = csv.join('\r\n')
// Create link and download
var link = document.createElement('a');
link.setAttribute('href', 'data:text/csv;charset=utf-8,%EF%BB%BF' + encodeURIComponent(csv));
link.setAttribute('download', filename);
link.style.visibility = 'hidden';
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
};
Then call it like this:
this.downloadCSVFromJson(`myCustomName.csv`, this.state.csvArrayOfJson)
There are multiple options available to reuse the existing powerful libraries that are standards based.
If you happen to use D3 in your project, then you can simply invoke:
d3.csv.format or d3.csv.formatRows functions to convert an array of objects into csv string.
d3.csv.formatRows gives you greater control over which properties are converted to csv.
Please refer to d3.csv.format and d3.csv.formatRows wiki pages.
There are other libraries available too like jquery-csv, PapaParse. Papa Parse has no dependencies - not even jQuery.
For jquery based plugins, please check this.
Try these Examples
Example 1:
JsonArray = [{
"AccountNumber": "123",
"AccountName": "abc",
"port": "All",
"source": "sg-a78c04f8"
}, {
"Account Number": "123",
"Account Name": "abc",
"port": 22,
"source": "0.0.0.0/0",
}]
JsonFields = ["Account Number","Account Name","port","source"]
function JsonToCSV(){
var csvStr = JsonFields.join(",") + "\n";
JsonArray.forEach(element => {
AccountNumber = element.AccountNumber;
AccountName = element.AccountName;
port = element.port
source = element.source
csvStr += AccountNumber + ',' + AccountName + ',' + port + ',' + source + "\n";
})
return csvStr;
}
Example2 :
JsonArray = [{
"AccountNumber": "1234",
"AccountName": "abc",
"inbound": [{
"port": "All",
"source": "sg-a78c04f8"
},
{
"port": 22,
"source": "0.0.0.0/0",
}]
}]
JsonFields = ["Account Number", "Account Name", "port", "source"]
function JsonToCSV() {
var csvStr = JsonFields.join(",") + "\n";
JsonArray.forEach(element => {
AccountNumber = element.AccountNumber;
AccountName = element.AccountName;
element.inbound.forEach(inboundELe => {
port = inboundELe.port
source = inboundELe.source
csvStr += AccountNumber + ',' + AccountName + ',' + port + ',' + source + "\n";
})
})
return csvStr;
}
You can even download the csv file using the following code :
function downloadCSV(csvStr) {
var hiddenElement = document.createElement('a');
hiddenElement.href = 'data:text/csv;charset=utf-8,' + encodeURI(csvStr);
hiddenElement.target = '_blank';
hiddenElement.download = 'output.csv';
hiddenElement.click();
}
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