npm i -S file-saver xlsx
import FileSaver from ‘file-saver‘;
import XLSX2 from ‘xlsx‘;
class ToXlsx {
// id指的是绑定数据的table的id,
// title指的是导出表格的名称,记得带后缀xlsx,例如:title=‘重复导.xlsx‘;
constructor (id, title) {
this.id = id;
this.title = title;
}
async createTable() {
// 判断要导出的节点中是否有fixed的表格,如果有,转换excel时先将该dom移除,然后append回去,
let fix = document.querySelector (‘.el-table__fixed‘);
let wb;
if (fix) {
wb = XLSX2.utils.table_to_book(document.querySelector(this.id).removeChild(fix));
document.querySelector(this.id).appendChild(fix);
} else {
wb = XLSX2.utils.table_to_book(document.querySelector(this.id));
}
/* get binary string as output */
let wBout = XLSX2.write(wb, {
bookType: ‘xlsx‘,
bookSST: true,
type: ‘array‘
});
try {
FileSaver.saveAs(
new Blob([wBout], {
type: ‘application/octet-stream‘
}),
this.title
);
} catch (e) {
if (typeof console !== ‘undefined‘) console.log(e, wBout);
}
return wBout;
}
}
export default ToXlsx
在js页面直接import,然后使用
import ToXlsx from "../../utils/to_xlsx";
// 参数1 表格id
// 参数2 保存的excel文件名
let xlsx = new ToXlsx(‘#table-data‘, ‘下载.xlsx‘);
xlsx.createNormalTable()
npm i -S xlsx-style xlsx
这个时候需要修改源码
在\node_modules\xlsx-style\dist\cpexcel.js 807行把 var cpt = require(‘./cpt‘ + ‘able‘); 改成 var cpt = cptable;
如果还报错
在\node_modules\xlsx-style\ods.js 10行和13行把路径改为 require(‘./ xlsx‘)
import XLSX2 from ‘xlsx‘;
import XLSX from ‘xlsx-style‘;
class ToXlsx {
// id指的是绑定数据的table的id,
// title指的是导出表格的名称,记得带后缀xlsx,例如:title=‘重复导.xlsx‘;
constructor (id, title) {
this.id = id;
this.title = title;
}
/**
* 自定义表格
* @returns {Promise<void>}
*/
async createCustomizeTable() {
let sheet = XLSX2.utils.table_to_sheet(document.querySelector(this.id));
// 设置单个单元格样式 ,A2对应的是excel表格的A2
// sheet["A2"].s = {
// alignment: {
// horizontal: "center",
// vertical: "center",
// wrap_text: true
// }
};
// sheet居然是个对象,所以遍历就用for in
// 偷个懒,因为要所有的表格都居中,所以这里就用for in 遍历设置了,如果只是单个设置,那就用上面的单独设置就行
for (let key in sheet){
if (new RegExp(‘^[A-Za-z0-9]+$‘).exec(key)) {
let cell = key.toString();
sheet[cell].s = {
alignment: {
horizontal: "center", // 水平对齐-居中
vertical: "center", // 垂直对齐-居中
wrap_text: true
}
}
}
}
// wpx 字段表示以像素为单位,wch 字段表示以字符为单位
// 注意,必须从第一个开始设置,不能只设置单独一个
// !cows是列宽
sheet[‘cols‘] = [
{wch: 16}, // A列
{wch: 16}, // B列
{wch: 16}, // C列
{wch: 16}, // D列
];
// !rows设置的行高
sheet[‘!rows‘] = [
{wpx: 40,}, // 1行
{wpx: 40}, // 2行
{wpx: 40}, // 3行
{wpx: 40}, // 4行
];
try {
this.openDownloadDialog(this.sheet2blob(sheet), this.title);
} catch (e) {
console.log(‘自定义表格报错‘, e);
}
}
/**
* 将表转换为最终excel文件的blob对象,并使用URL.createObjectUR下载它
* @param sheet 表格配置项
* @param sheetName 表格名称
* @returns {Blob}
*/
sheet2blob(sheet, sheetName) {
sheetName = sheetName || ‘sheet1‘;
let workbook = {
SheetNames: [sheetName],
Sheets: {}
};
workbook.Sheets[sheetName] = sheet; // 生成excel的配置项
let wopts = {
bookType: ‘xlsx‘, // 要生成的文件类型
bookSST: false, // 是否生成Shared String Table,官方解释是,如果开启生成速度会下降,但在低版本IOS设备上有更好的兼容性
type: ‘binary‘
};
let wbout = XLSX.write(workbook, wopts);
let blob = new Blob([s2ab(wbout)], {
type: "application/octet-stream"
}); // 字符串转ArrayBuffer
function s2ab(s) {
let buf = new ArrayBuffer(s.length);
let view = new Uint8Array(buf);
for (let i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
return buf;
}
return blob;
}
/**
*
* @param url 生成的文件
* @param saveName 保存文件名称
*/
openDownloadDialog(url, saveName) {
if (typeof url == ‘object‘ && url instanceof Blob) {
url = URL.createObjectURL(url); // 创建blob地址
}
let aLink = document.createElement(‘a‘);
aLink.href = url;
aLink.download = saveName || ‘‘; // HTML5新增的属性,指定保存文件名,可以不要后缀,注意,file:///模式下不会生效
let event;
if (window.MouseEvent) event = new MouseEvent(‘click‘);
else {
event = document.createEvent(‘MouseEvents‘);
event.initMouseEvent(‘click‘, true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
}
aLink.dispatchEvent(event);
}
}
export default ToXlsx
设置单元格的样式,就是设置工作表对象中的单元格对象的 s 属性。这个属性的值也是一个对象,它有五个属性:fill、font、numFmt、alignment和border。
Cell styles are specified by a style object that roughly parallels the OpenXML structure. The style object has five
top-level attributes: fill
, font
, numFmt
, alignment
, and border
.
Style Attribute | Sub Attributes | Values |
---|---|---|
fill | patternType | "solid" or "none" |
fgColor | COLOR_SPEC |
|
bgColor | COLOR_SPEC |
|
font | name | "Calibri" // default |
sz | "11" // font size in points |
|
color | COLOR_SPEC |
|
bold | true or false |
|
underline | true or false |
|
italic | true or false |
|
strike | true or false |
|
outline | true or false |
|
shadow | true or false |
|
vertAlign | true or false |
|
numFmt | "0" // integer index to built in formats, see StyleBuilder.SSF property |
|
"0.00%" // string matching a built-in format, see StyleBuilder.SSF |
||
"0.0%" // string specifying a custom format |
||
"0.00%;\\(0.00%\\);\\-;@" // string specifying a custom format, escaping special characters |
||
"m/dd/yy" // string a date format using Excel‘s format notation |
||
alignment | vertical | "bottom" or "center" or "top" |
horizontal | "bottom" or "center" or "top" |
|
wrapText | true or false |
|
readingOrder | 2 // for right-to-left |
|
textRotation | Number from 0 to 180 or 255 (default is 0 ) |
|
90 is rotated up 90 degrees |
||
45 is rotated up 45 degrees |
||
135 is rotated down 45 degrees |
||
180 is rotated down 180 degrees |
||
255 is special, aligned vertically |
||
border | top | { style: BORDER_STYLE, color: COLOR_SPEC } |
bottom | { style: BORDER_STYLE, color: COLOR_SPEC } |
|
left | { style: BORDER_STYLE, color: COLOR_SPEC } |
|
right | { style: BORDER_STYLE, color: COLOR_SPEC } |
|
diagonal | { style: BORDER_STYLE, color: COLOR_SPEC } |
|
diagonalUp | true or false |
|
diagonalDown | true or false |
在js页面直接import,然后使用
import ToXlsx from "../../utils/to_xlsx";
// 参数1 表格id
// 参数2 保存的excel文件名
let xlsx = new ToXlsx(‘#table-data‘, ‘下载.xlsx‘);
xlsx.createCustomizeTable()
Export excel using js-xlsx pure front end
原文:https://www.cnblogs.com/WhiteM/p/14068701.html