/**
  * 批量导出用户
  * @param condition
  * @param response
  */
@PostMapping("/exportUser")
public void exportUser(@RequestBody UserQueryCondition condition,HttpServletResponse response){
 XSSFWorkbook book = new XSSFWorkbook();
 try {
  List<UserParam> list = indexService.exportUser(condition);
  if (list != null && list.size() > 0) {
   XSSFSheet sheet = book.createSheet("mySheent");
   String[] vals = {"用户ID", "邮箱账号","昵称","年龄","性别","状态", "注册时间"};
   createExcel(sheet, 0, vals);
   for (int i = 0; i < list.size(); i++) {
    UserParam entity = list.get(i);
    String[] vals2 = new String[]{String.valueOf(entity.getId()), entity.getEmail(), entity.getName(), String.valueOf(entity.getAge()),
            entity.getSex() == 0 "女":"男",entity.getRemoved() == 0 "启用":"禁用",entity.getRegisterDate()};
    createExcel(sheet, i + 1, vals2);
   }

   book.write(generateResponseExcel("用户列表",response));
  }
  book.close();
 }catch(Exception e){
  e.printStackTrace();
 }
}

/**
  * @param excelName
  *   要生成的文件名字
  * @return
  * @throws IOException
  */
private ServletOutputStream generateResponseExcel(String excelName, HttpServletResponse response) throws IOException {
 excelName = excelName == null || "".equals(excelName) "excel" : URLEncoder.encode(excelName, "UTF-8");
 response.setContentType("application/vnd.ms-excel;charset=utf-8");
 response.setHeader("Content-Disposition", "attachment; filename=" + excelName + ".xlsx");

 return response.getOutputStream();
}

response.setContentType("application/vnd.ms-excel;charset=utf-8");
response.setHeader("Content-Disposition", "attachment; filename=" + excelName + ".xlsx");

axios({
  method: 'post',
  url: 'http://localhost:19090/exportUser',
  data: {
   email: this.email,
   userIdArray: this.userIdArray,
   startRegisterDate: this.registerStartTime,
   endRegisterDate: this.registerEndTime
  },
  responseType: 'blob'
  }).then((res) => {
  console.log(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);
  let num = ''
  for(let i=0;i < 10;i++){
   num += Math.ceil(Math.random() * 10)
  }
  link.setAttribute('download', '用户_' + num + '.xlsx')
  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)
  })

 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);
  let num = ''
  for(let i=0;i < 10;i++){
   num += Math.ceil(Math.random() * 10)
  }
  link.setAttribute('download', '用户_' + num + '.xlsx')
  document.body.appendChild(link)
  link.click()
  document.body.removeChild(link)