service.interceptors.response.use(
 response => {
   // 導(dǎo)出
   const headers = response.headers
   if (headers['content-type'] === 'application/octet-stream;charset=utf-8') {
     return response.data
   }
   ...//這里時其他的情況
 },
 error => {
   return Promise.reject(error)
 }
)

   exportClick () {
         export().then(res => {
           const content = res
           const blob = new Blob([content])
           const fileName = '導(dǎo)出信息.xlsx'
           if ('download' in document.createElement('a')) { // 非IE下載
             const elink = document.createElement('a')//創(chuàng)建一個a標(biāo)簽通過a標(biāo)簽的點擊事件區(qū)下載文件
             elink.download = fileName
             elink.style.display = 'none'
             elink.href = URL.createObjectURL(blob)//使用blob創(chuàng)建一個指向類型數(shù)組的URL
             document.body.appendChild(elink)
             elink.click()
             URL.revokeObjectURL(elink.href) // 釋放URL 對象
             document.body.removeChild(elink)
           } else { // IE10+下載
             navigator.msSaveBlob(blob, fileName)
           }
         })
       }

if (res.type == "application/json") {
    ...
}
if (res.type == "application/octet-stream"){
    ...
}      

         if (res.type == "application/json") {
           // console.log("type == json");
           const reader = new FileReader(); //通過fileReader將blob類型的數(shù)據(jù)轉(zhuǎn)換成json格式的數(shù)據(jù)
           reader.readAsText(res, "utf-8");
           reader.onload = function () {
             //讀取完成后返回字符串形式的內(nèi)容
             // console.log("reader.result", reader.result);
             const msg = JSON.parse(reader.result);
             console.log("JSON轉(zhuǎn)換結(jié)果", msg);
			  //...這里時對轉(zhuǎn)換后結(jié)果的操作
             }
           };
         }