我知道有很多类似的问题,但我需要使用JavaScript来完成。我正在使用Dojo 1.8
,并且已经将所有属性信息存储在一个数组中,它看起来像这样:
[["name1", "city_name1", ...]["name2", "city_name2", ...]]
你有什么想法可以在客户端将此导出为CSV
吗?
我知道有很多类似的问题,但我需要使用JavaScript来完成。我正在使用Dojo 1.8
,并且已经将所有属性信息存储在一个数组中,它看起来像这样:
[["name1", "city_name1", ...]["name2", "city_name2", ...]]
你有什么想法可以在客户端将此导出为CSV
吗?
虽然这是一个有很多好答案的老问题,但以下方法使用两个流行库来解决问题。有些答案提到了Papa Parse,但将下载部分自己实现。通过结合 Papa Parse 和 FileSaver.js,你可以尝试以下代码:
const dataString = Papa.unparse(data, config);
const blob = new Blob([dataString], { type: 'text/csv;charset=utf-8' });
FileSaver.saveAs(blob, 'myfile.csv');
unparse
的 config
选项在此处描述:here。
这就是您要的:
<!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>
react-csv
库非常好用,是任何使用模块的人的绝佳解决方案。 - Matt Parrilla//It work in Chrome and IE ... I reviewed and readed a lot of answer. then i used it and tested in both ...
var link = document.createElement("a");
if (link.download !== undefined) { // feature detection
// Browsers that support HTML5 download attribute
var blob = new Blob([CSV], { type: 'text/csv;charset=utf-8;' });
var url = URL.createObjectURL(blob);
link.setAttribute("href", url);
link.setAttribute("download", fileName);
link.style = "visibility:hidden";
}
if (navigator.msSaveBlob) { // IE 10+
link.addEventListener("click", function (event) {
var blob = new Blob([CSV], {
"type": "text/csv;charset=utf-8;"
});
navigator.msSaveBlob(blob, fileName);
}, false);
}
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
//Regards
function export2csv() {
let data = "";
const tableData = [];
const rows = [
['111', '222', '333'],
['aaa', 'bbb', 'ccc'],
['AAA', 'BBB', 'CCC']
];
for (const row of rows) {
const rowData = [];
for (const column of row) {
rowData.push(column);
}
tableData.push(rowData.join(","));
}
data += tableData.join("\n");
const a = document.createElement("a");
a.href = URL.createObjectURL(new Blob([data], { type: "text/csv" }));
a.setAttribute("download", "data.csv");
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
}
<button onclick="export2csv()">Export array to csv file</button>
这里有很多自己编写的解决方案来将数据转换为CSV,但几乎所有这些方案都会在正确格式化数据时出现各种警告,而不会使Excel或类似软件出错。
为什么不使用一些已被证明有效的东西:Papa Parse?
Papa.unparse(data[, config])
然后,只需将此与本地下载解决方案之一结合使用,例如@ArneHB的解决方案看起来不错。
var test_array = [["name1", 2, 3], ["name2", 4, 5], ["name3", 6, 7], ["name4", 8, 9], ["name5", 10, 11]];
var csv = test_array.map(function(d){
return d.join();
}).join('\n');
/* Results in
name1,2,3
name2,4,5
name3,6,7
name4,8,9
name5,10,11
这种方法还允许您在内部连接中指定除逗号以外的列分隔符,例如制表符:d.join('\t')
另一方面,如果您想正确地用引号""将字符串括起来,那么可以使用一些JSON技巧:
var csv = test_array.map(function(d){
return JSON.stringify(d);
})
.join('\n')
.replace(/(^\[)|(\]$)/mg, ''); // remove opening [ and closing ]
// brackets from each line
/* would produce
"name1",2,3
"name2",4,5
"name3",6,7
"name4",8,9
"name5",10,11
var data = [
{"title": "Book title 1", "author": "Name1 Surname1"},
{"title": "Book title 2", "author": "Name2 Surname2"},
{"title": "Book title 3", "author": "Name3 Surname3"},
{"title": "Book title 4", "author": "Name4 Surname4"}
];
// use
var csv = data.map(function(d){
return JSON.stringify(Object.values(d));
})
.join('\n')
.replace(/(^\[)|(\]$)/mg, '');
.replace
应该指定花括号和方括号。 - aaronbartell.replace
是在 values()
返回的字符串上执行的,该方法接受一个对象并返回一个值数组。 - Konstantinvalues()
方法。 - aaronbartellObject
上调用values()
就可以工作。我已经更正了这个例子。 - Konstantinvar blob = new Blob([data], {type: "text/csv"});
如果浏览器支持保存Blob,例如:if (window.navigator.msSaveOrOpenBlob){}
,那么可以使用以下代码保存CSV数据:window.navigator.msSaveBlob(blob, 'filename.csv')
如果浏览器不支持保存和打开blob,则可以将csv数据保存为:var downloadLink = document.createElement('<a></a>');
downloadLink.attr('href', window.URL.createObjectURL(blob));
downloadLink.attr('download', filename);
downloadLink.attr('target', '_blank');
document.body.append(downloadLink);
Full Code snippet:
var filename = 'data_'+(new Date()).getTime()+'.csv';
var charset = "utf-8";
var blob = new Blob([data], {
type: "text/csv;charset="+ charset + ";"
});
if (window.navigator.msSaveOrOpenBlob) {
window.navigator.msSaveBlob(blob, filename);
} else {
var downloadLink = document.element('<a></a>');
downloadLink.attr('href', window.URL.createObjectURL(blob));
downloadLink.attr('download', filename);
downloadLink.attr('target', '_blank');
document.body.append(downloadLink);
downloadLink[0].click();
}
来自react-admin:
function downloadCsv(csv, filename) {
const fakeLink = document.createElement('a');
fakeLink.style.display = 'none';
document.body.appendChild(fakeLink);
const blob = new Blob([csv], { type: 'text/csv' });
if (window.navigator && window.navigator.msSaveOrOpenBlob) {
// Manage IE11+ & Edge
window.navigator.msSaveOrOpenBlob(blob, `${filename}.csv`);
} else {
fakeLink.setAttribute('href', URL.createObjectURL(blob));
fakeLink.setAttribute('download', `${filename}.csv`);
fakeLink.click();
}
};
downloadCsv('Hello World', 'any-file-name.csv');
这里是我在Java GWT应用程序中如何在客户端下载CSV文件的方法。特别感谢Xavier John提供的解决方案。它已经在FF 24.6.0,IE 11.0.20和Chrome 45.0.2454.99(64位)中验证可行。希望这能为某人节省一些时间:
public class ExportFile
{
private static final String CRLF = "\r\n";
public static void exportAsCsv(String filename, List<List<String>> data)
{
StringBuilder sb = new StringBuilder();
for(List<String> row : data)
{
for(int i=0; i<row.size(); i++)
{
if(i>0) sb.append(",");
sb.append(row.get(i));
}
sb.append(CRLF);
}
generateCsv(filename, sb.toString());
}
private static native void generateCsv(String filename, String text)
/*-{
var blob = new Blob([text], { 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);
}
}
}-*/;
}