@[TOC]
- elementUI版本
"element-ui": "^2.15.0"element官网- 本次封装移植了elementUI上的所有方法，只需要通过columns去配置即可
- 本次二次封装中集成了，表格分页，前端下载（支持下载当前页和指定数据量数据），表格列筛选功能，如只需表格功能请移步基于element-Ui 2.15.0 table二次封装表格
- 使用时注意文件路径。
- 文章结尾会有使用示例
- 使用插件
"xlsx": "^0.16.9";"file-saver": "^2.0.5"用于文件下载
整体图
列筛选
导出
页条数选择
主要封装tables文件
tables.vue
excel前端导出文件
excel表格下载封装使用 支持列/行合并 宽度自适应....(本js封装来源网络，具体使用请异步)
src/libs/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")
}
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
};
} 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}`);
}
对象深拷贝
/utils/utils
/**
* 对象深拷贝
* @param obj
*/
export const deepCopy = obj => {
let result = Array.isArray(obj) ? [] : {};
for (let key in obj) {
// eslint-disable-next-line no-prototype-builtins
if (obj.hasOwnProperty(key)) {
if (typeof obj[key] === "object") {
result[key] = deepCopy(obj[key]); // 递归复制
} else {
result[key] = obj[key];
}
}
}
return result;
};
请求方式
/utils/request
import axios from "axios";
import { MessageBox, Message } from "element-ui";
import store from "@/store";
import { getToken } from "@/utils/auth";
import { Base64 } from "js-base64";
import con from "@/config/index";
// create an axios instance
let base;
if (process.env.VUE_APP_MODE === "development") {
base = con.dev;
} else {
base = con.pro;
}
console.log('base=====>',base);
const service = axios.create({
baseURL: base, // url = base url + request url
// withCredentials: true, // send cookies when cross-domain requests
timeout: con.timeout * 1000, // request timeout
headers:{
'Content-Type': 'application/json'
}
});
// request interceptor
service.interceptors.request.use(
config => {
config.headers["Authorization"] = `Basic ${Base64.encode(
`${con.clientId}:${con.clientSecret}`
)}`;
if (getToken()) {
config.headers["Blade-Auth"] = "bearer " + getToken(); // 让每个请求携带token--['Authorization']为自定义key 请根据实际情况自行修改
}
return config;
},
error => {
// do something with request error
console.log(error); // for debug
return Promise.reject(error);
}
);
// response interceptor
service.interceptors.response.use(
/**
* If you want to get http information such as headers or status
* Please return response => response
*/
/**
* Determine the request status by custom code
* Here is just an example
* You can also judge the status by HTTP Status Code
*/
response => {
const res = response.data;
// if the custom code is not 20000, it is judged as an error.
if (res.code !== 200) {
Message({
message: res.message || "Error",
type: "error",
duration: 5 * 1000
});
// 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
if (res.code === 500) {
// to re-login
MessageBox.confirm(
"You have been logged out, you can cancel to stay on this page, or log in again",
"Confirm logout",
{
confirmButtonText: "Re-Login",
cancelButtonText: "Cancel",
type: "warning"
}
).then(() => {
store.dispatch("user/resetToken").then(() => {
location.reload();
});
});
}
return Promise.reject(new Error(res.message || "Error"));
} else {
return res;
}
},
error => {
console.log("err" + error); // for debug
Message({
message: error.message,
type: "error",
duration: 5 * 1000
});
return Promise.reject(error);
}
);
export default service;
使用方式
1、传入url表格组件自动处理请求数据