163 lines
4.0 KiB
JavaScript
163 lines
4.0 KiB
JavaScript
require("script-loader!file-saver");
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require("script-loader!xlsx/dist/xlsx.core.min");
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require("script-loader!blob.js/Blob");
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/**
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* Created by kin on 2017/5/18.
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*
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* josn导出excel
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* mail：cuikangjie_90h@126.com
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*/
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const changeData = function(data, filter) {
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let sj = data,
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f = filter,
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re = [];
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Array.isArray(data)
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? (function() {
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//对象
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f
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? (function() {
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//存在过滤
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sj.forEach(function(obj) {
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let one = [];
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filter.forEach(function(no) {
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one.push(obj[no]);
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});
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re.push(one);
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});
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})()
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: (function() {
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//不存在过滤
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sj.forEach(function(obj) {
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let col = Object.keys(obj);
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let one = [];
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col.forEach(function(no) {
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one.push(obj[no]);
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});
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re.push(one);
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});
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})();
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})()
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: (function() {
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re = sj;
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})();
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return re;
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};
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// 转换数据
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const sheetChangeData = function(data) {
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let ws = {};
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let range = {
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s: {
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c: 10000000,
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r: 10000000
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},
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e: {
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c: 0,
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r: 0
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}
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};
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for (let R = 0; R != data.length; ++R) {
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for (let C = 0; C != data[R].length; ++C) {
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if (range.s.r > R) range.s.r = R;
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if (range.s.c > C) range.s.c = C;
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if (range.e.r < R) range.e.r = R;
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if (range.e.c < C) range.e.c = C;
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let cell = {
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v: data[R][C]
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};
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if (cell.v == null) continue;
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let cell_ref = XLSX.utils.encode_cell({
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c: C,
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r: R
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});
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if (typeof cell.v === "number") cell.t = "n";
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else if (typeof cell.v === "boolean") cell.t = "b";
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else if (cell.v instanceof Date) {
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cell.t = "n";
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cell.z = XLSX.SSF._table[14];
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cell.v = datenum(cell.v);
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} else cell.t = "s";
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ws[cell_ref] = cell;
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}
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}
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if (range.s.c < 10000000) ws["!ref"] = XLSX.utils.encode_range(range);
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return ws;
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};
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const s2ab = function(s) {
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let buf = new ArrayBuffer(s.length);
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let view = new Uint8Array(buf);
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for (let i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xff;
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return buf;
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};
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const datenum = function(v, date1904) {
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if (date1904) v += 1462;
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let epoch = Date.parse(v);
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return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
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};
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const columnwidths = function(columnWidths) {
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let out = [];
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out = columnWidths.map(function(item) {
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return { width: item ? parseInt(256 * (Number(item) / 100)) : 20 };
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});
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return out;
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};
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const exportExcel = function(options) {
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let _options = {
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fileName: options.fileName || "download",
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datas: options.datas,
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workbook: {
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SheetNames: [],
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Sheets: {}
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}
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};
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const instance = {
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saveExcel: function() {
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let wb = _options.workbook;
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_options.datas.forEach(function(data, index) {
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let sheetHeader = data.sheetHeader || null;
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let sheetData = data.sheetData;
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let sheetName = data.sheetName || "sheet" + (index + 1);
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let sheetFilter = data.sheetFilter || null;
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let columnWidths = data.columnWidths || [];
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sheetData = changeData(sheetData, sheetFilter);
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if (sheetHeader) {
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sheetData.unshift(sheetHeader);
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}
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let ws = sheetChangeData(sheetData);
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ws["!merges"] = [];
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ws["!cols"] = columnwidths(columnWidths);
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wb.SheetNames.push(sheetName);
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wb.Sheets[sheetName] = ws;
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});
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let wbout = XLSX.write(wb, {
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bookType: "xlsx",
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bookSST: false,
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type: "binary"
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});
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saveAs(
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new Blob([s2ab(wbout)], {
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type: "application/octet-stream"
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}),
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_options.fileName + ".xlsx"
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);
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}
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};
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return instance;
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};
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module.exports = exportExcel; |