聊聊JS的二进制家族：Blob、ArrayBuffer和Buffer

JS中的Blob和ArrayBuffer

封装方法

function getExel(url, params, index) {+
  return new Promise(function(resolve, reject) {
    let data = {
      method: "GET",
      url:url,
      headers: {
        'token':  gettoken("token")
      },
      responseType: 'arraybuffer'
    }
    resolve(axios(data));
  })
}

注意：responseType应设置为：'arraybuffer'

发送请求（$Api已经挂载在了vue对象上，所以可以这么使用）

this.$Api.getExel("/goodsCheckService/v1/planMaterial/export?idList="+idArray)
          .then(response => {
              let a = document.createElement('a');

              //ArrayBuffer 转为 Blob
              let blob = new Blob([response.data], {type: "application/vnd.ms-excel"}); 
              
              let objectUrl = URL.createObjectURL(blob);
              a.setAttribute("href",objectUrl);
              a.setAttribute("download", '计划单电子表格.xls');
              a.click();
});