js json转csv
Posted simple_孙
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$(document).ready(function() { "use strict"; var mo = { init: function() { $(‘.download‘).click(function() { var data = $(‘#txt‘).val(); if (data === ‘‘) { return; } mo.JSONToCSVConvertor(data, true); }); }, JSONToCSVConvertor: function(JSONData, ShowLabel) { var arrData = typeof JSONData !== ‘object‘ ? JSON.parse(JSONData) : JSONData; var CSV = ‘‘; if (ShowLabel) { var row = ""; for (var index in arrData[0]) { row += index + ‘,‘; } row = row.slice(0, -1); CSV += row + ‘ ‘; } for (var i = 0; i < arrData.length; i++) { var row = ""; for (var index in arrData[i]) { var arrValue = arrData[i][index] == null ? "" : ‘="‘ + arrData[i][index] + ‘"‘; row += arrValue + ‘,‘; } row.slice(0, row.length - 1); CSV += row + ‘ ‘; } if (CSV == ‘‘) { growl.error("Invalid data"); return; } var fileName = "Result"; if (mo.msieversion()) { var IEwindow = window.open(); IEwindow.document.write(‘sep=, ‘ + CSV); IEwindow.document.close(); IEwindow.document.execCommand(‘SaveAs‘, true, fileName + ".csv"); IEwindow.close(); } else { var uri = ‘data:application/csv;charset=utf-8,‘ + escape(CSV); var link = document.createElement("a"); link.href = uri; link.style = "visibility:hidden"; link.download = fileName + ".csv"; document.body.appendChild(link); link.click(); document.body.removeChild(link); } }, msieversion: function() { var ua = window.navigator.userAgent; var msie = ua.indexOf("MSIE "); if (msie > 0 || !!navigator.userAgent.match(/Trident.*rv:11./)) // If Internet Explorer, return version number { return true; } else { // If another browser, return false; } return false; }, main: function() { mo.init(); } }; mo.main(); });
另一种
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) + ‘ ‘; firfixCSV = (firfixCSV.slice(0, -1) + ‘ ‘); } 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 + ‘ ‘; firfixCSV = (firfixCSV.slice(0, -1) + ‘ ‘); } 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); }
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