axios请求后端接口下载Excel文件

axios请求后端接口下载Excel文件

引入axios

import axios from 'axios'
export default {
}

/* 导出政策 */
    exportPolicy () {
      const ids = this.selectPolicyList.map(item => item.id)
      const instance = axios.create({
        baseURL: '',
        responseType: 'blob',
        headers: { 'Content-Type': 'application/json ' }
      })
      this.fullscreenLoading = true
      instance
        .post('/frontend/api/policy/exportExcel', { ids: ids })
        .then((res) => {
          this.handlerResponse(res.data)
        })
    },
    // 处理请求回来的json
    handlerResponse (data) {
      const _this = this
      const fileReader = new FileReader()
      fileReader.onload = function () {
        try {
          const jsonData = JSON.parse(fileReader.result) // 说明是普通对象数据，后台转换失败
          // console.log('后台返回的信息', jsonData.message)
          _this.$message.error(jsonData.message)
          setTimeout(() => {
            _this.fullscreenLoading = false
          }, 2000)
        } catch (err) {
          // 解析成对象失败，说明是正常的文件流
          const content = data
          const filename = '行业政策.xls'
          const blob = new Blob([content], {
            type:
              'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8'
          })
          if (window.navigator.msSaveOrOpenBlob) {
            // 兼容IE10
            navigator.msSaveBlob(blob, filename)
          } else {
            //  chrome/firefox
            const aTag = document.createElement('a')
            aTag.download = filename
            aTag.href = URL.createObjectURL(blob)
            aTag.click()
            URL.revokeObjectURL(aTag.href)
          }
          setTimeout(() => {
            _this.fullscreenLoading = false
          }, 2000)
        }
      }
      fileReader.readAsText(data)
    },