1.安装npm依赖
npm install xlsx file-saver -S
npm install xlsx
2.引入完整的Export2Excel.js:
/* eslint-disable */
import { saveAs } from 'file-saver'
import XLSX from 'xlsx'
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")
}
// 对此方法进行修改,如下:
export function export_json_to_excel({
multiHeader2 = [], // 第一行表头
multiHeader = [], // 第二行表头
header, // 第三行表头
data,
filename, //文件名
merges = [], // 合并
autoWidth = true,
bookType = 'xlsx'
} = {}) {
/* original data */
filename = filename || '列表';
data = [...data]
data.unshift(header);
for (let i = multiHeader2.length - 1; i > -1; i--) {
data.unshift(multiHeader2[i])
}
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
};
} else {
return {
'wch': val.toString().length
};
}
}))
/*以第一行为初始值*/
let result = colWidth[0];
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;
}
/* add worksheet to workbook */
wb.SheetNames.push(ws_name);
wb.Sheets[ws_name] = ws;
var wbout = XLSX.write(wb, {
bookType: bookType,
bookSST: false,
type: 'binary'
});
saveAs(new Blob([s2ab(wbout)], {
type: "application/octet-stream"
}), `${filename}.${bookType}`);
}
3.vue文件中引入:
import { export_json_to_excel } from "@/assets/js/Export2Excel";
4.直接上js,其他的布局之类的我就不展示了
data() {
return {
excelData: [], //表格数据,这个是你自己请求的真实数据
}
}
methods: {
//重置EXcel数据
resetExcelData() {
this.excelData = [];
if (this.transforList.length > 0) {
for (let excelItem of this.transforList) {
// console.log(excelItem.transformerEntityList);
let excelObj = {
plantname:
excelItem.plantname != null && excelItem.plantname != undefined
? excelItem.plantname
: "",
transName:
excelItem.transName != null && excelItem.transName != undefined
? excelItem.transName
: "",
ea:
excelItem.ea != null && excelItem.ea != undefined
? excelItem.ea
: "",
sa:
excelItem.sa != null && excelItem.sa != undefined
? excelItem.sa
: "", //视在功率
pa:
excelItem.pa != null && excelItem.pa != undefined
? excelItem.pa
: "", //有功功率
fa:
excelItem.fa != null && excelItem.fa != undefined
? excelItem.fa
: "", //无功功率
f:
excelItem.f != null && excelItem.f != undefined
? excelItem.f
: "", //功率因数
az:
excelItem.az != null && excelItem.az != undefined
? excelItem.az
: "", //A相绕组温度
bz:
excelItem.bz != null && excelItem.bz != undefined
? excelItem.bz
: "", //B相绕组温度
cz:
excelItem.cz != null && excelItem.cz != undefined
? excelItem.cz
: "", //C相绕组温度
status:
excelItem.status != null && excelItem.status != undefined
? excelItem.status
: "",
fuhe: "--%",
};
this.excelData.push(excelObj);
}
}
},
//json格式化
formatJson(filterVal, jsonData) {
jsonData.map((v) => filterVal.map((j) => v[j]));
return jsonData.map((v) => filterVal.map((j) => v[j]));
},
//导出方法
exportExcel() {
this.resetExcelData();
const multiHeader = [
[
"站点名称",
"变压器名称",
"状态",
"额定容量(kVA)",
"视在功率(kW)",
"负荷率(100%)",
"有功功率(kW)",
"无功功率(kVar)",
"功率因数",
"三相绕组温度",
"",
"",
]
]; //一级表头
const tHeader = ["", "", "", "", "", "", "", "", "", "A", "B", "C"]; //二级表头
const filterVal = ["plantname","transName","status","ea","sa","fuhe","pa", "fa","f","az","bz","cz"];//表头所对应后台返回的字段
// const data = this.excelData.map(v => filterVal.map(j => v[j]));//这一行和下面得六行代码是一样得作用的
let list = [];
if (this.excelData == 0) {
list = this.excelData;
} else {
list = this.excelData;
}
const data = this.formatJson(filterVal, list);//格式化
console.log(data);
//这个得说明一下:网上得博客每个不一样,你那我的直接用也是没啥用得,你的理解这个合并是怎么写的:根据你的多级表头,如果没有合并得从上往下写,遇到开始合并单元格的,从左往右得单行写,从上到下,直到写完整
const merges = [
"A1:A2",
"B1:B2",
"C1:C2",
"D1:D2",
"E1:E2",
"F1:F2",
"G1:G2",
"H1:H2",
"I1:I2",
"J1:L1"
];
export_json_to_excel({
multiHeader, //这里是第一行的表头
header: tHeader, //这里应该是算第二行的表头
data,//数据
merges,//合并行
filename: "变压器状态" + "_" + new Date().getTime(),
autoWidth: true,
bookType: 'xlsx'
});
}
}
5.效果:
总结:
我的这个是两级表头,那么三级表头你应该也会做的,只是merges得细心找一下!