调用：

const currentTime=processDate(new Date());

函数：

  function processDate(date) {
    date = date.toLocaleString("zh-cn", {timeZone: "Asia/Shanghai"});
    date = new Date(date);
    var y = date.getFullYear();
    var m = date.getMonth() + 1;
    m = m < 10 ? ('0' + m) : m;
    var d = date.getDate();
    d = d < 10 ? ('0' + d) : d;
    var h = date.getHours();
    h=h < 10 ? ('0' + h) : h;
    var minute = date.getMinutes();
    minute = minute < 10 ? ('0' + minute) : minute;
    var second= date.getSeconds();
    second=second < 10 ? ('0' + second) : second;
    return y + '-' + m + '-' + d+' '+h+':'+minute+':'+second;
  };