前言：主要用到的东西是:xlsx-style,之后进行二次封装，再引入使用
（代码实现并没有获取页面什么东西，是直接拿数据源进行处理出来，注释都在代码中！！！）
npm地址
一。将xlsx-style引入项目
npm install xlsx-style --save
二。将xlsx-style封装一下
/* eslint-disable */
import FileSaver from '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': 200
};
}
/*再判断是否为中文*/
else if (val.toString().charCodeAt(0) > 255) {
return {
'wch': val.toString().length * 5
};
} else {
return {
'wch': val.toString().length * 3
};
}
}))
/*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] < colWidth[i][j]) {
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
}
}
}
var wbout = XLSX.write(wb, {
bookType: bookType,
bookSST: false,
type: 'binary'
});
saveAs(new Blob([s2ab(wbout)], {
type: "application/octet-stream"
}), `${filename}.${bookType}`);
}
三。将封装好的xlsx-style进行使用
//-------------------引入封装的组件------------------------------------------------
import * as excelExport from '../../utils/Export2Excel'
class MyComponent extends React.Component {
constructor(props) {
super(props);
this.state = {
data: [],
source:[],
//TA数据分红导出
DetailColumns:[],
DetailtableData:[],
DTexcelHeader: [], //
DTexcelBody: [], //
DTfilterVal: [], //
DTdate:'',
}
}
//----------------处理数据的函数 --------------------------------------------------
dealwithDetailData(){
const DetailColumns = [ //需要展示的表头
{
title: '第一列', //表头名字
dataIndex: 'F_CODE',//对应的后端返回字段
key: 'F_CODE',//react渲染的key值，可以和dataIndex一样
},
{
title: '第二列',
dataIndex: 'F_NAME',
key: 'F_NAME',
},
{
title: '第三列',
dataIndex: 'R_DATE',
key: 'R_DATE',
},
];
let DTexcelHeader = []
let DTexcelBody = []
let DTfilterVal = []
DetailColumns.map(item => {
if (!item.children) {
DTexcelHeader.push(item.title)
DTfilterVal.push(item.dataIndex)
} else {
item.children.map(itm => {
DTexcelHeader.push(item.title + itm.title)
DTfilterVal.push(itm.dataIndex)
})
}
})
this.state.DetailtableData.map(item => {
for (const i in item) {
if (item.hasOwnProperty(i) && item[i] == null) {
item[i] = ''
}
}
DTexcelBody.push(item)
})
this.setState({
DetailColumns,DTexcelHeader, DTexcelBody,DTfilterVal
})
};
//excel导出数据进行格式化函数
formatJson(DTfilterVal, jsonData) {
return jsonData.map(v => DTfilterVal.map(j => v[j]));
};
//---------------因为xlsx-style,比较大，所以在点击的时候再调用---------
render(){
return (
<div>
<Button icon="file-excel" key="confim" type="primary" size="large"
onClick={ ()=>excelExport.export_json_to_excel({
header:this.state.DTexcelHeader, //表头
data:this.formatJson(this.state.DTfilterVal,this.state.DTexcelBody), //数据格式化
filename:`某某文件(${this.state.DTdate})`, //导出的名字
autoWidth: true,
bookType: "xlsx"
})
}>
导出Excel
</Button>
</div>
)
}
}
网友评论