vue中后端做Excel导出功能返回数据流前端的处理操作

// 导出Excel公用方法
export function exportMethod(data) {
  axios({
    method: data.method,
    url: `${data.url}${data.params ? '?' + data.params : ''}`,
    responseType: 'blob'
  }).then((res) => {
    const link = document.createElement('a')
    let blob = new Blob([res.data], {type: 'application/vnd.ms-excel'})
    link.style.display = 'none'
    link.href = URL.createObjectURL(blob)
 
    // link.download = res.headers['content-disposition'] //下载后文件名
    link.download = data.fileName //下载的文件名
    document.body.appendChild(link)
    link.click()
    document.body.removeChild(link)
  }).catch(error => {
    this.$Notice.error({
      title: '错误',
      desc: '网络连接错误'
    })
    console.log(error)
  })
}

// 导出会诊接诊量统计表
    exportDepReceRank() {
      let myObj = {
        method: 'get',
        url: exportDepartmentRankUrl,
        fileName: 'XX医院—各科室会诊接诊量统计',
        params: `startDate=${changeDate(this.dateValue[0])}&endDate=${changeDate(this.dateValue[1])}`
      }
      exportMethod(myObj)
    },

// download.js
import axios from 'axios'

export function download(type, name) {
 axios({
  method: 'post',
  url: 'http://127.0.0.1:8080/api/download',
  // headers里面设置token
  headers: {
   loginCode: 'xxx',
   authorization: 'xxx'
  },
  data: {
   name: name,
   type: type
  },
  // 二进制流文件，一定要设置成blob，默认是json
  responseType: 'blob'
 }).then(res => {
  const link = document.createElement('a')
  const blob = new Blob([res.data], { type: 'application/vnd.ms-excel' })
  link.style.display = 'none'
  link.href = URL.createObjectURL(blob)
  link.setAttribute('download', `${name}.xlsx`)
  document.body.appendChild(link)
  link.click()
  document.body.removeChild(link)
 })
}

// download.java
@RequestMapping(value = "/api/download",produces = "application/octet-stream", method = RequestMethod.POST)
public void downloadTemplate(@RequestBody Map<String,Object> paramsMap, HttpServletResponse response) {
  try {
    if (paramsMap.get("type").equals("xxx") && paramsMap.get("name").equals("xxx")) {
      String[] str = new String[]{"区县","所属省份","所属地市"};
      Workbook workbook = ExportExcel.exportExcel("行政区划表模版", str, null, "yyyy-MM-dd");
      download(response, workbook, "CityDict");
    }
  } catch (Exception e) {
    e.printStackTrace();
  }
}

private void download(HttpServletResponse response, Workbook workbook, String fileName) {
  try {
    response.setContentType("application/octet-stream;charset=UTF-8;");
    response.addHeader("Content-Disposition", "attachment;fileName=" + fileName + ".xlsx");
    ByteArrayOutputStream by = new ByteArrayOutputStream();
    OutputStream osOut = response.getOutputStream();
    // 将指定的字节写入此输出流
    workbook.write(osOut);
    // 刷新此输出流并强制将所有缓冲的输出字节被写出
    osOut.flush();
    // 关闭流
    osOut.close();
  } catch (IOException e) {
    LogUtils.getExceptionLogger().info("下载模板错误:{}", e.getMessage());
  }
}