/*
CSV的格式是:
row1col1,row1col2,row1col3\r\n
row2col1,row2col2,row2col3\r\n
row3col1,row3col2,row3col3\r\n
思路很简单,拼凑字符串,避免特殊字符干扰CSV格式(西文双引号,逗号,换行等)。
下载的的方法是构建Url
data:text/csv;charset=UTF-8,Base32编码的csv字符串。
限制:
谷歌浏览器和IE浏览器对Url的最大长度限制不一样,总的来说,在前端组建CSV适用性非常有限,而且存在兼容性问题,不推荐使用。
*/
function JSONToCSVConvertor(JSONData, ReportTitle, ShowLabel) {
var arrData = typeof JSONData != 'object' ? JSON.parse(JSONData) : JSONData; var CSV = "\ufeff"; var firfixCSV = "\ufeff"; if (ShowLabel) { var row = ""; var firfixRow = ""; for (var index in arrData[0]) { row += index + ','; firfixCSV += index + ','; } CSV += row.slice(0, -1) + '\r\n'; firfixCSV = (firfixCSV.slice(0, -1) + '\n'); } for (var i = 0; i < arrData.length; i++) { var row = ""; for (var index in arrData[i]) { row += '"' + arrData[i][index] + '",'; firfixCSV += arrData[i][index] + ','; } row.slice(0, row.length - 1); CSV += row + '\r\n'; firfixCSV = (firfixCSV.slice(0, -1) + '\n'); } if (CSV == '') { alert("Invalid data"); return; } var link = document.createElement("a"); link.id = "lnkDwnldLnk"; document.body.appendChild(link); var csv = CSV; blob = new Blob([csv], { type: 'text/csv,charset=UTF-8', endings: 'native' }); if (window.webkitURL) { var csvUrl = window.webkitURL.createObjectURL(blob); } else { var csvUrl = 'data:text/csv;charset=UTF-8,\ufeff' + encodeURIComponent(firfixCSV); } var filename = ReportTitle + '.csv'; $("#lnkDwnldLnk") .attr({ 'download': filename, 'href': csvUrl }); $('#lnkDwnldLnk')[0].click(); $('.bs-example-modal-lg').modal('hide'); document.body.removeChild(link);}