vue Excel export [post + request prompt]

Generally, we realize excel export are redirected directly or form submission form, but the background if an exception occurs, a message will be displayed in a new window in the form of text, very friendly, recommended here another implementation, the use of post requests, and you can pass a custom error message:

Front-end axios, responseType to set blob

let that= this
let params = {
            activitiesId: activitiesId,
            startTime: startTime,
            endTime: endTime
 }
axios({
       method: 'post',
       url: '/activityManage/exportExcel',
       data: params,
       responseType: 'blob'
     }).then(resp => {
            that.downloadFile(resp,that)
     }).catch(resp => {
            that.$notify.error(resp.msg || ' Export failed ' ) 
     })

Download method implementations to open a new link, and then place the download button, and automatically click:

the downloadFile (RESP, that) { 
      the let Data = resp.data
　　　　// herein prompt custom prompt acquired from the header 
　　　　IF (resp.headers [ 'ERRORMSG'] ||! Data) { 
　　　　　　that. $ notify.error ( decodeURI (resp.headers [ 'ERRORMSG']) || 'export failed' )
　　　　　　return 
　　　　} 
      the let URL = window.URL.createObjectURL ( new new Blob ([Data])) 
      the let Link = document.createElement ( 'A' ) 
      Link. . style.display = 'none' 
      link.href = URL
       // filename is provided at a rear end 
      link.setAttribute ( 'download', decodeURI ( resp.headers [ 'filename' resp.headers [ 'filename']))
      document.body.appendChild(link)
      link.click()
    },

 

Background information settings file with the file name:

the try { 
　　　　HSSFWorkbook HSSFWorkbook = new new HSSFWorkbook () 
　　　　String errorMsg = null ;　　
　　    / * *      
　　　  * excel data encapsulation method thereof, ignored here, customizable Baidu POI 
　　　  * required custom error message, and finally into the header 
　　　  * = errorMsg " export Exception: activity "does not exist 
　　   * / 
　　　　　String fileName =" Excel export data " ;
         // empty response 
        response.reset ();
         // set the response of the Header 
        the Response.Addheader (" Content-Disposition "," Attachment; filename = " the URLEncoder.encode + (fileName, "UTF-. 8" ));
　　　　　// message
　　　　 response.setHeader("errorMsg", URLEncoder.encode(errorMsg, "utf-8"));
        response.setHeader("FileName", URLEncoder.encode(fileName, "utf-8"));
        response.setContentType("application/vnd.ms-excel;charset=gb2312");
        OutputStream os = new BufferedOutputStream(response.getOutputStream());
        hssfWorkbook.write(os);
　　　　　hssfWorkbook.close();
        os.flush();
        os.close();
　　} catch (Exception e) {
    　　log.error("导出分析数据异常："+e);
    　　throw new RuntimeException(e);
　　}