let reader = new FileReader();
reader.onload= e => {
    //获取数据
    let data = e.target.result;
    let workbook = XLSX.read(data, { type: 'array' })
    let firstSheetName = workbook.SheetNames[0]
    let worksheet = workbook.Sheets[firstSheetName]
    let results = XLSX.utils.sheet_to_json(worksheet, {range: 0})
    // 此处获取result及为最后结果  
}

reader.readAsArrayBuffer(file.raw)

　　

const reader = new FileReader()
        reader.onload = e => {
          const data = e.target.result
          const workbook = XLSX.read(data, { type: 'array' })
          const firstSheetName = workbook.SheetNames[0]
          const worksheet = workbook.Sheets[firstSheetName]
          const header = getHeaderRow(worksheet)
          if (header[0] != '敏感词'){
            that.$message({
              message: '请使用模板格式导入',
              type: 'warning'
            });
            that.$refs.el_upload.uploadFiles.splice(file_site,1)
          }
        }
        reader.readAsArrayBuffer(file.raw)




getHeaderRow(sheet) {
        var that = this;
        const headers = []
        const range = XLSX.utils.decode_range(sheet['!ref'])
        let C
        const R = range.s.r + 0;

        /* start in the first row */
        for (C = range.s.c; C <= range.e.c; ++C) { /* walk every column in the range */
          const cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })];
          /* find the cell in the first row */
          let hdr = 'UNKNOWN ' + C // <-- replace with your desired default
          if (cell && cell.t) hdr = XLSX.utils.format_cell(cell)
          headers.push(hdr)
        }
        return headers
      },