引入XLSX

 1 import XLSX from 'xlsx'
 2 import Vue from 'vue'
 3 const vm = new Vue();
 4 
 5 async function readExcel (file) {
 6   const types = file.name.split('.');
 7   const type = types[types.length - 1];
 8   const fileType = [
 9     'xlsx', 'xls', 'XLSX', 'XLS'
10   ].some(item => item == type);
11   if (!fileType) {
12     vm.$message.error('格式错误！请重新选择')
13     return
14   }
15     
16   const result = [];
17   
18    const loaded =  (row) => {
19     return new Promise((resolve) =>{
20       const reader = new FileReader();
21       reader.onload = function(e) {
22         const data = e.target.result;
23         const wb = XLSX.read(data, {
24           type: 'binary'
25         });
26         
27         wb.SheetNames.forEach((sheetName) => {
28           result.push(
29             XLSX.utils.sheet_to_json(wb.Sheets[sheetName], {header:1,defval:''})
30             /* {
31             sheet: XLSX.utils.sheet_to_json(wb.Sheets[sheetName], {header:1,defval:''})
32             } */
33           )
34         });
35         resolve(true)
36       };
37       reader.readAsBinaryString(row)
38     })
39   }
40 
41   await loaded(file.raw)
42   return result;
43 }
44 
45 export { readExcel }

使用

 1 <el-upload ref="upload" accept=".xls,.xlsx" action="" :auto-upload="false" :on-change="handleUpload" :show-file-list="false">
 2                         <el-button type="primary" plain>选择文件</el-button>
 3                         <span>只能上传xls或xlsx文件</span>
 4                         <span>{{form.fileName}}</span>
 5                     </el-upload>
 6 
 7 
 8 handleUpload (file,fileList) {
 9     // readExcel(file)
10     if(fileList && fileList.length) {
11         this.ruleForm.fileText = [];
12         this.ruleForm.fileName = fileList[fileList.length - 1].name;
13         readExcel(file).then((res) =>{
14             if (res) {
15                  const obj = res[0];  
16                  for(let i = 0; i < obj.length; i ++) {
17                  　　const arr = {}
18                  　　arr.itemIds = obj[i][0];
19                  　　arr.subThemeTitle = obj[i][1];
20                  　　this.ruleForm.fileText.push(arr);
21              　　}
22          　　}
23        })
24     }
25 ,