如何将JavaScript数组信息导出到csv(在客户端)?

我知道有很多这种性质的问题，但我需要使用JavaScript来做到这一点。我使用Dojo 1.8并在数组中拥有所有属性信息，它看起来像这样:

[["name1", "city_name1", ...]["name2", "city_name2", ...]]

知道我如何在客户端将此导出为CSV吗?

当前回答

一个极简但功能完整的解决方案:)

/** Convert a 2D array into a CSV string
 */
function arrayToCsv(data){
  return data.map(row =>
    row
    .map(String)  // convert every value to String
    .map(v => v.replaceAll('"', '""'))  // escape double colons
    .map(v => `"${v}"`)  // quote it
    .join(',')  // comma-separated
  ).join('\r\n');  // rows starting on new lines
}

例子:

let csv = arrayToCsv([
  [1, '2', '"3"'],
  [true, null, undefined],
]);

结果:

"1","2","""3"""
"true","null","undefined"

现在将其下载为文件:


/** Download contents as a file
 * Source: https://stackoverflow.com/questions/14964035/how-to-export-javascript-array-info-to-csv-on-client-side
 */
function downloadBlob(content, filename, contentType) {
  // Create a blob
  var blob = new Blob([content], { type: contentType });
  var url = URL.createObjectURL(blob);

  // Create a link to download it
  var pom = document.createElement('a');
  pom.href = url;
  pom.setAttribute('download', filename);
  pom.click();
}

下载:

downloadBlob(csv, 'export.csv', 'text/csv;charset=utf-8;')

2021-06-26 21:35:10

其他回答

就是这样:

<!doctype html>  
<html>  
<head></head>  
<body>
<a href='#' onclick='downloadCSV({ filename: "stock-data.csv" });'>Download CSV</a>

<script type="text/javascript">  
    var stockData = [
        {
            Symbol: "AAPL",
            Company: "Apple Inc.",
            Price: "132.54"
        },
        {
            Symbol: "INTC",
            Company: "Intel Corporation",
            Price: "33.45"
        },
        {
            Symbol: "GOOG",
            Company: "Google Inc",
            Price: "554.52"
        },
    ];

    function convertArrayOfObjectsToCSV(args) {
        var result, ctr, keys, columnDelimiter, lineDelimiter, data;

        data = args.data || null;
        if (data == null || !data.length) {
            return null;
        }

        columnDelimiter = args.columnDelimiter || ',';
        lineDelimiter = args.lineDelimiter || '\n';

        keys = Object.keys(data[0]);

        result = '';
        result += keys.join(columnDelimiter);
        result += lineDelimiter;

        data.forEach(function(item) {
            ctr = 0;
            keys.forEach(function(key) {
                if (ctr > 0) result += columnDelimiter;

                result += item[key];
                ctr++;
            });
            result += lineDelimiter;
        });

        return result;
    }

    window.downloadCSV = function(args) {
        var data, filename, link;

        var csv = convertArrayOfObjectsToCSV({
            data: stockData
        });
        if (csv == null) return;

        filename = args.filename || 'export.csv';

        if (!csv.match(/^data:text\/csv/i)) {
            csv = 'data:text/csv;charset=utf-8,' + csv;
        }
        data = encodeURI(csv);

        link = document.createElement('a');
        link.setAttribute('href', data);
        link.setAttribute('download', filename);
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
       }
</script>  
</body>  
</html>

2015-12-02 13:21:06

上面的答案是可行的，但请记住，如果你以.xls格式打开，列~~可能会用'\t'而不是'，'分隔，答案https://stackoverflow.com/a/14966131/6169225对我来说很好，只要我在数组上使用.join('\t')而不是.join('，')。

2016-10-26 15:46:47

我添加到Xavier Johns函数也包括字段头，如果需要，使用jQuery。美元的。对于原生javascript循环，每个位都需要更改

function exportToCsv(filename, rows, headers = false) {
    var processRow = function (row) {
        row = $.map(row, function(value, index) {
            return [value];
        });
        var finalVal = '';
        for (var j = 0; j < row.length; j++) {
            if(i == 0 && j == 0 && headers == true){
                var ii = 0;
                $.each(rows[i], function( index, value ) {
                    //console.log(index);
                    var fieldName = index === null ? '' : index.toString();
                    //console.log(fieldName);
                    var fieldResult = fieldName.replace(/"/g, '""');
                    //console.log(fieldResult);
                    if (fieldResult.search(/("|,|\n)/g) >= 0){
                        fieldResult = '"' + fieldResult + '"';
                    }
                    //console.log(fieldResult);
                    if (ii > 0){
                        finalVal += ',';
                        finalVal += fieldResult;
                    }else{
                        finalVal += fieldResult;
                    }
                    ii++;
                    //console.log(finalVal);
                });
                finalVal += '\n';
                //console.log('end: '+finalVal);
            }
            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;
            }else{
                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);
        }
    }
}

2016-09-20 12:25:07

ES6的一个箭头函数:

const dataToCsvURI = (data) => encodeURI(
`data:text/csv;charset=utf-8,${data.map((row, index) =>  row.join(',')).join(`\n`)}`
);

然后:

window.open(
  dataToCsvURI(
   [["name1", "city_name1"/*, ...*/], ["name2", "city_name2"/*, ...*/]]
  )
);

如果有人在reactjs中需要这个，react-csv就在那里

2016-11-25 10:15:06

从react-admin:

function downloadCsv(csv, filename) {
    const fakeLink = document.createElement('a');
    fakeLink.style.display = 'none';
    document.body.appendChild(fakeLink);
    const blob = new Blob([csv], { type: 'text/csv' });
    if (window.navigator && window.navigator.msSaveOrOpenBlob) {
        // Manage IE11+ & Edge
        window.navigator.msSaveOrOpenBlob(blob, `${filename}.csv`);
    } else {
        fakeLink.setAttribute('href', URL.createObjectURL(blob));
        fakeLink.setAttribute('download', `${filename}.csv`);
        fakeLink.click();
    }
};

downloadCsv('Hello World', 'any-file-name.csv');

2020-10-21 12:23:35

如何将JavaScript数组信息导出到csv(在客户端)?

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