如何在javascript中从yyyyMMdd‘T’‘T’HHmmss‘Z’中获取UTC时间

function getUTCFromDateString(dateString) {
  // 将字符串转换为Date对象
  var date = new Date(dateString);

  // 获取UTC时间的各个部分
  var year = date.getUTCFullYear();
  var month = date.getUTCMonth() + 1; // 月份从0开始，需要加1
  var day = date.getUTCDate();
  var hours = date.getUTCHours();
  var minutes = date.getUTCMinutes();
  var seconds = date.getUTCSeconds();

  // 格式化UTC时间
  var utcTime = year + '-' + padZero(month) + '-' + padZero(day) + ' ' + padZero(hours) + ':' + padZero(minutes) + ':' + padZero(seconds);

  return utcTime;
}

// 辅助函数，用于补零
function padZero(num) {
  return num < 10 ? '0' + num : num;
}

// 示例用法
var dateString = '20220101T123456Z';
var utcTime = getUTCFromDateString(dateString);
console.log(utcTime);