前段时间，我们项目提出一个前端导出Excel表格的需求，
这个很简单，利用xlsx，file-saver很容易实现(网上很多教程)。
后来需要加入标题，标题居中显示，加入边框等等样式需求，这就给我很多困扰，查阅大量资料和研究，最终选定xlsx-style进行修改(借鉴/p/23ee264ecde8)。
以下便是xlsx-style踩坑之旅：
导入问题cnpm install --save xlsx-style
import XLSX from "xlsx-style"报错：This relative module was not found: ./cptable in ./node_modules/xlsx-style@0.8.13@xlsx-style/dist/cpexcel.js
需要修改源码：
在\node_modules\xlsx-style\dist\cpexcel.js 807行 的 var cpt = require(’./cpt’ + ‘able’); 改成 var cpt = cptable;
本地src目录新建vendor/Export2Excel.js：
/* eslint-disable */
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({
title,
multiHeader = [],
header,
data,
filename,
merges = [],
autoWidth = true,
bookType = 'xlsx'
} = {}) {
/* original data */
filename = filename || 'excel-list'
data = [...data]
data.unshift(header);
data.unshift(title);
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 dataInfo = wb.Sheets[wb.SheetNames[0]];
const borderAll = { //单元格外侧框线
top: {
style: 'thin'
},
bottom: {
style: 'thin'
},
left: {
style: 'thin'
},
right: {
style: 'thin'
}
};
//给所以单元格加上边框
for (var i in dataInfo) {
if (i == '!ref' || i == '!merges' || i == '!cols' || i == 'A1') {
} else {
dataInfo[i + ''].s = {
border: borderAll
}
}
}
// 去掉标题边框
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"];
arr.some(function (v) {
let a = merges[0].split(':')
if (v == a[1]) {
dataInfo[v].s = {}
return true;
} else {
dataInfo[v].s = {}
}
})
//设置主标题样式
dataInfo["A1"].s = {
font: {
name: '宋体',
sz: 18,
color: {rgb: "ff0000"},
bold: true,
italic: false,
underline: false
},
alignment: {
horizontal: "center",
vertical: "center"
},
// fill: {
// fgColor: {rgb: "008000"},
// },
};
// console.log(merges)
// console.log(dataInfo)
var wbout = XLSX.write(wb, {
bookType: bookType,
bookSST: false,
type: 'binary'
});
saveAs(new Blob([s2ab(wbout)], {
type: "application/octet-stream"
}), `${filename}.${bookType}`);
}
组建中使用：
exportExcel() {
import('@/vendor/Export2Excel').then(excel => {
const tHeader = ['船名', '船长', '货种', '载重吨', '净吨', '锚地', '预抵时间', '下锚时间', '预靠泊位'] //表头
const title = ['锚地船舶', '', '', '', '', '', '', '', ''] //标题
//表头对应字段
const filterVal = ['NAME', 'VESSEL_LENGTH', 'CARGO_NAME', 'DEADWEIGHT_TONNAGE', 'NET_TONNAGE', 'ANCHORAGE_ID', 'EXP_ARCHORAGE_TIME', 'AC_ARCHORAGE_TIME', 'RECOMMEND_BERTH']
const list = this.anchorTable
const data = this.formatJson(filterVal, list)
data.map(item => {
// console.log(item)
item.map((i, index) => {
if (!i) {
item[index] = ''
}
})
})
const merges = ['A1:I1'] //合并单元格
excel.export_json_to_excel({
title: title,
header: tHeader,
data,
merges,
filename: '锚地船舶',
autoWidth: true,
bookType: 'xlsx'
})
})
},
formatJson(filterVal, jsonData) {
return jsonData.map(v => filterVal.map(j => v[j]))
},
此时问题解决，但是另一个问题就来了，因为修改了xlsx-style源码所以我们cnpm i的时候不能获取修改后的包，所以，我想到了将修改后的源码上传自己的npm再下载自己修改后的包。
上传npm (百度)
借鉴/hahahhahahahha123456/article/details/82055227
解决npm publish报错问题。
最后在Export2Excel.js中
import XLSX from 'yxg-xlsx-style'
yxg-xlsx-style是自己npm上传的解决引入错误的包。
或者直接npm install --save yxg-xlsx-style引入项目
此文后期如有修改继续更新，文中借鉴部分帮助很大，研究了很久，不喜勿喷。
js vue 设置excel单元格样式_vue项目使用xlsx-style实现前端导出Excel样式修改（添加标题 边框等） 并且上传npm踩坑记录...
