js使用XLSX前端导出excel
实现效果：
页面：
导出的excel：
xlsx.core.min.js文件下载地址 xlsx
代码如下：
<!DOCTYPE html>
<html>
<head>
<title>HTML Template</title>
<style>
table {
border-collapse: collapse;
}
th,
td {
border: 1px solid #000;
}
</style>
</head>
<script src="./xlsx.core.min.js"></script>
<body>
<table id="myTable">
<thead>
<tr>
<th>姓名</th>
<th>年龄</th>
<th>手机号</th>
</tr>
</thead>
<tbody>
<tr>
<td>姓名1</td>
<td>13</td>
<td>23232323</td>
</tr>
<tr>
<td>姓名2</td>
<td>3</td>
<td>1111111</td>
</tr>
<tr>
<td rowspan="2" colspan="2">姓名3</td>
<!-- <td>17</td> -->
<td>2222222</td>
</tr>
<tr>
<!-- <td>姓名4</td> -->
<!-- <td>10</td> -->
<td>3333333</td>
</tr>
<tr>
<td>姓名5</td>
<td>38</td>
<td>332222</td>
</tr>
</tbody>
</table>
<button onclick="export_table_to_excel('myTable')">导出</button>
</body>
<script>
function export_table_to_excel(id) {
var theTable = document.getElementById(id);
var oo = generateArray(theTable);
var ranges = oo[1];
/* original data */
var data = oo[0];
var ws_name = "SheetJS";
var wb = new Workbook(),
ws = sheet_from_array_of_arrays(data);
/* add ranges to worksheet */
// ws['!cols'] = ['apple', 'banan'];
ws["!merges"] = ranges;
/* add worksheet to workbook */
wb.SheetNames.push(ws_name);
wb.Sheets[ws_name] = ws;
var wbout = XLSX.write(wb, {
bookType: "xlsx",
bookSST: false,
type: "binary",
});
const newBlob = new Blob([s2ab(wbout)], {
type: "application/octet-stream",
});
console.log("newBlob", newBlob);
let fileName = "test.xlsx";
var a = document.createElement("a");
var url = window.URL.createObjectURL(newBlob);
// var filename = response.headers.get('Content-Disposition');
a.href = url;
a.download = fileName;
a.click();
window.URL.revokeObjectURL(url);
}
function generateArray(table) {
var out = [];
var rows = table.querySelectorAll("tr");
var ranges = [];
for (var R = 0; R < rows.length; ++R) {
var outRow = [];
var row = rows[R];
var columns = row.querySelectorAll("td");
for (var C = 0; C < columns.length; ++C) {
var cell = columns[C];
var colspan = cell.getAttribute("colspan");
var rowspan = cell.getAttribute("rowspan");
var cellValue = cell.innerText;
if (cellValue !== "" && cellValue == +cellValue)
cellValue = +cellValue;
//Skip ranges
ranges.forEach(function (range) {
if (
R >= range.s.r &&
R <= range.e.r &&
outRow.length >= range.s.c &&
outRow.length <= range.e.c
) {
for (var i = 0; i <= range.e.c - range.s.c; ++i)
outRow.push(null);
}
});
//Handle Row Span
if (rowspan || colspan) {
rowspan = Number(rowspan) || 1;
colspan = Number(colspan) || 1;
ranges.push({
s: {
r: R,
c: outRow.length,
},
e: {
r: R + rowspan - 1,
c: outRow.length + colspan - 1,
},
});
}
//Handle Value
outRow.push(cellValue !== "" ? cellValue : null);
//Handle Colspan
if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
}
out.push(outRow);
}
return [out, ranges];
}
function datenum(v, date1904) {
if (date1904) v += 1462;
var epoch = Date.parse(v);
return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
}
function sheet_from_array_of_arrays(data, opts) {
var ws = {};
var range = {
s: {
c: 10000000,
r: 10000000,
},
e: {
c: 0,
r: 0,
},
};
for (var R = 0; R != data.length; ++R) {
for (var C = 0; C != data[R].length; ++C) {
if (range.s.r > R) range.s.r = R;
if (range.s.c > C) range.s.c = C;
if (range.e.r < R) range.e.r = R;
if (range.e.c < C) range.e.c = C;
var cell = {
v: data[R][C],
};
if (cell.v == null) continue;
var cell_ref = XLSX.utils.encode_cell({
c: C,
r: R,
});
if (typeof cell.v === "number") cell.t = "n";
else if (typeof cell.v === "boolean") cell.t = "b";
else if (cell.v instanceof Date) {
cell.t = "n";
cell.z = XLSX.SSF._table[14];
cell.v = datenum(cell.v);
} else cell.t = "s";
ws[cell_ref] = cell;
}
}
if (range.s.c < 10000000) ws["!ref"] = XLSX.utils.encode_range(range);
return ws;
}
function Workbook() {
if (!(this instanceof Workbook)) return new Workbook();
this.SheetNames = [];
this.Sheets = {};
}
function s2ab(s) {
var buf = new ArrayBuffer(s.length);
var view = new Uint8Array(buf);
for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xff;
return buf;
}
</script>
</html>
