axios导出 exer

this.axios({
  url: `${this.domain}ledger/people/exportExcel`,
  responseType: 'blob',
  method: 'post',
  data: params
}).then(res => {
  if(res.data) {
    let blob = res.data
    let a = document.createElement('a')
    let url = window.URL.createObjectURL(blob)
    let filename = '重点人.xls'
    a.href = url
    a.download = filename
    a.click()
    window.URL.revokeObjectURL(url)
  }
})