1、单表头的导出
(1)引入vuei-json-excel的依赖
npm i vue-json-excel -D
(2)全局注册或局部注册
- 全局注册(main.js)
import JsonExcel from 'vue-json-excel'
Vue.component('downloadExcel', JsonExcel)
- 局部注册
import downloadExcel from 'vue-json-excel'
就可以在页面中进行使用
<download-excel
class="export-excel-wrapper"
:data="echartData"
:fields="excelHead"
name="导出的文件名.xls'"
>
<!-- 上面可以自定义自己的样式,还可以引用其他组件button -->
<el-button type="primary" size="small" class="deriveBtn">导出</el-button>
</download-excel>
echartData: [] //table的数据
excelHead: [] //table的对应的字段
比如:
//前面是表头,后面对应的是字段
excelHead: [
{
"名字": "name",
"年龄": "age"
}
]
在导出的时候,会遇到的问题,接口返回的是id,但是导出的excel中需要展示的是对应的名称,不要怕我们也有方法进行解决:
比如:返回的性别是0或者1,0表示男,1表示女。
excelHead: [
{
"名字": "name",
"年龄": "age",
"性别": {
field: 'sex', // 对应的字段
callback: value => { //进行数据处理
return value === 0 ? "男" : "女"
}
}
}
]
这样我们就可以实现简单的excel导出啦!
2、多表头的导出
(1)这里需要引入两个依赖file-saver -D和yxg-xlsx-style
npm i yxg-xlsx-style -D
npm i file-saver -D
引入成功之后,可以在
>src
>util
exportExcel.js
创建一个js文件:
注册file-saver和yxg-xlsx-style
import { saveAs } from 'file-saver'
import XLSX from 'yxg-xlsx-style'
export function export_json_to_excel({
multiHeader = [],
header,
data,
filename,
merges = [],
setStyleCallBack,
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 dataInfo = wb.Sheets[wb.SheetNames[0]];
// 设置样式
setStyleCallBack&&setStyleCallBack(dataInfo)
var wbout = XLSX.write(wb, {
bookType: bookType,
bookSST: false,
type: 'binary'
});
saveAs(new Blob([s2ab(wbout)], {
type: "application/octet-stream"
}), `${filename}.${bookType}`);
}
function sheet_from_array_of_arrays(data) {
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;
}
这些就是exportExcel.js文件的代码。
(2)使用
<el-button
class="left"
v-preventReClick
size="small"
type="primary"
@click="exportData"
>导出</el-button>
exportData() {
import("@/util/Export2Excel").then((excel) => {
const multiHeader = [
[],
];
const tHeader = [];
const fields = [];
const values = this.formatJson(fields, table数据);
const merges = [];
const setStyleCallBack = (dataInfo) => {
const borderAll = {
top: {
style: "thin",
},
bottom: {
style: "thin",
},
left: {
style: "thin",
},
right: {
style: "thin",
},
};
for (var key in dataInfo) {
if (key == "!cols" || key == "!merges" || key == "!ref") return;
dataInfo[key].s = {
border: borderAll,
font: {
name: "宋体",
sz: 11,
bold: true,
},
alignment: {
horizontal: "left",
vertical: "center",
},
};
}
};
excel.export_json_to_excel({
header: tHeader,
multiHeader,
data: values,
merges,
setStyleCallBack,
filename: "导出的excel文件名",
});
});
},
formatJson(filterVal, jsonData) {
return jsonData.map((v) =>
filterVal.map((j) => {
const pathArr = j.split(".");
let tVal = v;
pathArr.forEach((key) => {
tVal = tVal[key];
});
return tVal;
})
);
},
1、 multiHeader:为表头的第一行;
2、tHeader:为表头的第二行;
3、fields:为table表格的字段(按照顺序将字段列出来就好啦);
4、merges:为表格合并设置
比如:
multiHeader: [
[
"序号",
"预警组织",
"单位工程",
"监测项目",
"监测点编号",
"批次",
"初始值",
"",
"",
"上次观测",
"",
"",
"预警结果",
"累计消除预警次数",
"消警状态"
]
],
tHeader: [
"",
"",
"",
"",
"",
"",
"初始日期",
"初始值",
"校正量",
"初始日期",
"初始值",
"校正量",
"",
"",
""
],
merges的用法:
merges: [
"A1:A2",
"B1:B2",
"C1:C2",
"D1:D2",
"E1:E2",
"F1:F2",
"G1:I1",
"J1:L1",
"M1:M2",
"N1:N2",
"O1:O2",
],
这里注意框起来的部分是多表头,红框设置"G1:I1",篮筐设置"J1:L1",表格上也可以看出从哪个位置开始,到哪个位置结束。
这样多表头导出就可以实现啦!
若有更好的导出方法,欢迎留言推荐!!!