Vue用Export2Excel导出excel,多级表头数据
最近公司前端做一个导出数据到Excel表单，并要求有表头，做了下简单样式修改，但是xlsx文件单元格高度没有生效，记录一下，希望能别人一些帮助。
1.安装依赖 四个安装包
npm install --save file-saver
npm install --save xlsx
npm install -D script-loader
npm install --save xlsx-style2.创建文件
在项目src 下创建 util 文件夹
然后创建 Export2Excel.js 文件
/* eslint-disable */
import { saveAs } from 'file-saver'
// import XLSX from 'xlsx'
import XLSX from "xlsx-style"
// require('script-loader!file-saver');
// import XLSX from 'xlsx-style'
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 = rowspan || 1;
colspan = 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;
}
export 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'
});
saveAs(new Blob([s2ab(wbout)], {
type: "application/octet-stream"
}), "test.xlsx")
}
export function export_json_to_excel({
multiHeader = [],
header,
data,
filename,
merges = [],
autoWidth = true,
bookType = 'xlsx',
} = {}) {
/* original data */
filename = filename || 'excel-list'
data = [...data]
data.unshift(header);
for (let i = multiHeader.length - 1; i > -1; i--) {
data.unshift(multiHeader[i])
}
var ws_name = "SheetJS";
var wb = new Workbook(),
ws = sheet_from_array_of_arrays(data);
if (merges.length > 0) {
if (!ws['!merges']) ws['!merges'] = [];
merges.forEach(item => {
ws['!merges'].push(XLSX.utils.decode_range(item))
})
}
if (autoWidth) {
/*设置worksheet每列的最大宽度*/
const colWidth = data.map(row => row.map(val => {
/*先判断是否为null/undefined*/
if (val == null) {
return {
'wch': 10
};
}
/*再判断是否为中文*/
else if (val.toString().charCodeAt(0) > 255) {
return {
'wch': val.toString().length * 2.5
};
console.log('111111')
} else {
console.log('22222')
return {
'wch': val.toString().length * 1.5
};
}
}))
// onsole.log(colWidth);
/*以第一行为初始值*/
colWidth[0][0] = colWidth[0][1];
let result = colWidth[0];
console.log(result)
for (let i = 1; i < colWidth.length; i++) {
for (let j = 0; j < colWidth[i].length; j++) {
if (result[j]['wch'] < colWidth[i][j]['wch']) {
result[j]['wch'] = colWidth[i][j]['wch'];
}
}
}
ws['!cols'] = result;
//设置高
// wb['!rows'] = [{ hpx:200 }];
const colHeight = data.map(row => row.map(val => {
/*先判断是否为null/undefined*/
if (val == null) {
return {
'hpx': 40
};
}
/*再判断是否为中文*/
else if (val.toString().charCodeAt(0) > 255) {
return {
'hpx': 400
};
} else {
return {
'hpx': 400
};
}
}))
// console.log(colHeight)
/*以第一行为初始值*/
let result1 = colHeight[0];
for (let i = 1; i < colHeight.length; i++) {
for (let j = 0; j < colHeight[i].length; j++) {
if (result1[j]['hpx'] < colHeight[i][j]['hpx']) {
result1[j]['hpx'] = colHeight[i][j]['hpx'];
}
}
}
ws['!rows'] = result1;
}
/* add worksheet to workbook */
wb.SheetNames.push(ws_name);
wb.Sheets[ws_name] = ws;
var dataInfo = wb.Sheets[wb.SheetNames[0]];
// 设置单元格框线
const borderAll = {
top: {
style: "thin"
},
bottom: {
style: "thin"
},
left: {
style: "thin"
},
right: {
style: "thin"
}
};
// 给所有单元格加上边框，内容居中，字体，字号，标题表头特殊格式部分后面替换
for (var i in dataInfo) {
if (
i == "!ref" ||
i == "!merges" ||
i == "!cols" ||
i == "!rows" ||
i == "A1"
) { } else {
dataInfo[i + ""].s = {
border: borderAll,
alignment: {
horizontal: "center",
vertical: "center"
},
font: {
name: "微软雅黑",
sz: 10
}
};
}
}
/**
* 自定义
*/
var dataInfo = wb.Sheets[wb.SheetNames[0]];
let arr = [
"A1",
"B1",
"C1",
"D1",
"E1",
"F1",
"G1",
"H1",
"I1",
"J1",
"K1",
"L1",
"M1",
"N1",
"O1",
"P1",
"Q1",
"R1",
"S1",
"T1",
"U1",
"V1",
"W1",
"X1",
"Y1",
"Z1"
];
let style = {
font: {
color: { rgb: "ffffff" },
bold: true
},
alignment: {
horizontal: "center",
vertical: "center"
},
//单元格背景色
fill: {
fgColor: {
rgb: "8CB3E4"
},
},
};
for (var i = 0; i < header.length; i++) {
dataInfo[arr[i]].s = style;
}
var wbout = XLSX.write(wb, {
bookType: bookType,
bookSST: false,
type: 'binary'
});
saveAs(new Blob([s2ab(wbout)], {
type: "application/octet-stream"
}), `${filename}.${bookType}`);
}
3.vue中调用
把导出功能写成了个方法
// 导出多个个表头
handleDownload() {
import("../../util/Export2Excel.js").then((excel) => {
const multiHeader = [
[this.tempTitle, "", "", "", "", "", "", "", "", ""],
];
// 表头数据
const header = [
"序号",
"部门",
"姓名",
"部门正副职平均分",
"权重",
"职工代表",
"权重",
"总分",
"部门内部排名",
"备注",
];
// 数据来源中，代替表头的变量
const filterVal = [
"fare",
"sheng",
"name",
"lenglian",
"lenglian",
"inforadio",
"fare",
"phone",
"fare",
"fare",
];
const merges = ["A1:J1"];
// 数据来源
const list = this.tableData;
// 拼接数据
const data = this.formatJson(filterVal, list);
// const data = [];
excel.export_json_to_excel({
multiHeader,
header,
data,
// 导出表格的文件名字
filename: this.tempTitle,
merges,
});
});
},
// 拼接数据
formatJson(filterVal, jsonData) {
return jsonData.map((v) =>
filterVal.map((j) => {
return v[j];
})
);
},效果如下：
可能遇到的问题
解决方案1： 修改为 var cpt = cptable 修改的只是本地文件
解决方案2：webpack.base.conf.js
module.exports = {undefined
externals: [ {undefined
'./cptable': 'var cptable'
}]
}
