Javascript：如何将数组中的JSON数组转换为CSV文件？

Question

I'm struggeling with my JSON file here... This is what I get from my processing .php-file as a response:

{"1":{"Nachname":"Stromberg","Vorname":"Bernd", 
"Benutzername":"strombergbernd12","Password":"Xrz5Bv6A"},
"2":{"Nachname":"Heisterkamp","Vorname":"Ernie", 
"Benutzername":"heisterkampernie12","Password":"aOq24EpF"}}

Now, I want to build from this JSON array a csv file. In the first row the csv file should mention the headers Nachname, Vorname, Benutzername and Password and then list in the following rows the rest of the data.

I cant handle that, can you help me?

Answer 1

once you have your json as text you parse it:

var json = JSON.parse(jsonAsText);

transform it to an array:

json = Object.values(json);

init your result:

var csv = "";

keep header keys somewhere:

var keys = (json[0] && Object.keys(json[0])) || [];

write header row

csv += keys.join(',') + '\n';

iterate and put everything in csv

for (var line of json) {
  csv += keys.map(key => line[key]).join(',') + '\n';
}

Your csv content should be ready

 var json = { "1": { "Nachname": "Stromberg", "Vorname": "Bernd", "Benutzername": "strombergbernd12", "Password": "Xrz5Bv6A" }, "2": { "Nachname": "Heisterkamp", "Vorname": "Ernie", "Benutzername": "heisterkampernie12", "Password": "aOq24EpF" } } function toCSV(json) { json = Object.values(json); var csv = ""; var keys = (json[0] && Object.keys(json[0])) || []; csv += keys.join(',') + '\\n'; for (var line of json) { csv += keys.map(key => line[key]).join(',') + '\\n'; } return csv; } console.log(toCSV(json)); 

---

Note: If you can, switch your json to Array syntax:

[
  {
    "Nachname":"Stromberg",
    "Vorname":"Bernd",
    "Benutzername":"strombergbernd12",
    "Password":"Xrz5Bv6A"
  },
  {
    "Nachname":"Heisterkamp",
    "Vorname":"Ernie", 
    "Benutzername":"heisterkampernie12",
    "Password":"aOq24EpF"
  }
]

and then remove this line:

json = Object.values(json);

Answer 2

You could use: Object.keys() and Object.values() .

Something like this:

 (function() { var data = { "1": { "Nachname": "Stromberg", "Vorname": "Bernd", "Benutzername": "strombergbernd12", "Password": "Xrz5Bv6A" }, "2": { "Nachname": "Heisterkamp", "Vorname": "Ernie", "Benutzername": "heisterkampernie12", "Password": "aOq24EpF" } }; var csv = Object.keys(data[Object.keys(data)[0]]).join(","); // Header columns. csv += "\\n"; for (var item in data) { csv += Object.values(data[item]).join(","); csv += "\\n"; } console.log(csv); }()); 

 .as-console-wrapper { position: relative; top: 0; } 

The result will be: