时间戳与年月日转换以及获取当前时间

时间戳转为年月日

getYMDHMS (timestamp) {
      let time = new Date(timestamp)
      let year = time.getFullYear()
      let month = time.getMonth() + 1
      let date = time.getDate()
      let hours = time.getHours()
      let minute = time.getMinutes()
      let second = time.getSeconds()

      if (month < 10) { month = '0' + month }
      if (date < 10) { date = '0' + date }
      if (hours < 10) { hours = '0' + hours }
      if (minute < 10) { minute = '0' + minute }
      if (second < 10) { second = '0' + second }
      return year + '-' + month + '-' + date + ' ' + hours + ':' + minute + ':' + second
      //只获取年月日
      return year + '-' + month + '-' + date 
    }
  
    

  getYMDHMS (timestamp) {
      let time = new Date(timestamp)
      let year = time.getFullYear()
      const month = (time.getMonth() + 1).toString().padStart(2, '0')
      const date = (time.getDate()).toString().padStart(2, '0')
      const hours = (time.getHours()).toString().padStart(2, '0')
      const minute = (time.getMinutes()).toString().padStart(2, '0')
      const second = (time.getSeconds()).toString().padStart(2, '0')
      return year + '-' + month + '-' + date + ' ' + hours + ':' + minute + ':' + second
      //只获取年月日
      return year + '-' + month + '-' + date 
    }
    调用方式getYMDHMS(毫秒级时间戳)

   
   
    function timestampToTime(cjsj){
    //时间戳为10位需*1000，时间戳为13位的话不需乘1000
    var date = new Date(cjsj * 1000);
    var Y = date.getFullYear() + ' ';
    var M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth()+1) : date.getMonth() + 1) + ' ';
    var D = (date.getDate() < 10 ? '0'+date.getDate() : date.getDate()) + ' ';
    var h = (date.getHours() < 10 ? '0'+date.getHours() : date.getHours()) + ':';
    var m = (date.getMinutes() < 10 ? '0'+date.getMinutes() : date.getMinutes())+ ':';
    var s = (date.getSeconds() < 10 ? '0'+date.getSeconds() : date.getSeconds());
    return  Y + M + D + h + m + s;
}
    调用方式timestampToTime(时间戳)

年月日转换为时间戳

function getTimeFormat(timeS){
  let time = (new Date(timeS).getTime()) / 1000; //除1000 是变成秒级的时间戳 不除就是毫秒级
  return time;
}
getTimeFormat('2022-02-02 02:22:22');
//输出结果为：1643739742(秒级时间戳)

jquery获取当前时间(年/月/日 时:分:秒)

function getNowDateTime(){
    var now = new Date(); 
    var year = now.getFullYear(); 
    var month = (now.getMonth() + 1) < 10 ? '0' + (now.getMonth() + 1) : now.getMonth() + 1; 
    var dates = now.getDate() < 10 ? '0' + now.getDate() : now.getDate();
    var hours = now.getHours() < 10 ? "0" + now.getHours() : now.getHours();
    var minutes = now.getMinutes() < 10 ? '0' + now.getMinutes() : now.getMinutes();
    var seconds = now.getSeconds() < 10 ? '0' + now.getSeconds() : now.getSeconds();
    return year + "/" + month + "/" + dates + " " + hours + ":" + minutes + ":" + seconds; 
}
$(function(){
    console.log(getNowDateTime());
})