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

下面是我如何在Java GWT应用程序的客户端下载CSV文件。特别感谢Xavier John的解决方案。已验证在FF 24.6.0, IE 11.0.20, Chrome 45.0.2454.99(64位)下运行。我希望这能节省一些时间:

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);
            }
        }
    }-*/;
}

其他回答

如果你正在寻找一个真正快速的解决方案,你也可以给这个小库一个机会,它将为你创建和下载CSV文件:https://github.com/mbrn/filefy

用法非常简单:

import { CsvBuilder } from 'filefy';

var csvBuilder = new CsvBuilder("user_list.csv")
  .setColumns(["name", "surname"])
  .addRow(["Eve", "Holt"])
  .addRows([
    ["Charles", "Morris"],
    ["Tracey", "Ramos"]
  ])
  .exportFile();

用csv数据创建一个blob。ie var blob = new blob ([data], type:"text/csv");

如果浏览器支持保存blob,即如果window.navigator. msaveoropenblob)===true,则使用:window.navigator保存csv数据。“filename.csv”msSaveBlob (blob)

如果浏览器不支持保存和打开blob,则将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);

完整代码片段:

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(); 
}

基于上面的答案,我创建了这个函数,并在IE 11、Chrome 36和Firefox 29上进行了测试

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);
        }
    }
}

例如: https://jsfiddle.net/jossef/m3rrLzk0/

如果有人需要这个敲除js,它的工作好基本上提出的解决方案:

html:

<a data-bind="attr: {download: filename, href: csvContent}">Download</a>

视图模型:

// for the download link
this.filename = ko.computed(function () {
    return ko.unwrap(this.id) + '.csv';
}, this);
this.csvContent = ko.computed(function () {
    if (!this.csvLink) {
        var data = ko.unwrap(this.data),
            ret = 'data:text/csv;charset=utf-8,';

        ret += data.map(function (row) {
            return row.join(',');
        }).join('\n');

        return encodeURI(ret);
    }
}, this);
//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