JS 형식화 Json 날짜 사례 공유

/**
 * 格式化日期
 * @param obj
 * @returns 形如 2018-08-09
 */function fmtDate(obj){    var date =  new Date(obj);    var y = 1900+date.getYear();    var m = "0"+(date.getMonth()+1);    var d = "0"+date.getDate();    return y+"-"+m.substring(m.length-2,m.length)+"-"+d.substring(d.length-2,d.length);
}

/**
 * 格式化时间
 * @param obj
 * @returns 形如2018-08-09 08:00:00
 */function fmtDateTime(obj){    var d=new Date(obj);      var year=d.getFullYear();      var month="0"+(d.getMonth()+1);      var day="0"+d.getDate();      var hour="0"+d.getHours();      var minute="0"+d.getMinutes();      var second="0"+d.getSeconds();      var time=year+'-'+month.substring(month.length-2,month.length)+'-'+day.substring(day.length-2,day.length)+      ' '+hour.substring(hour.length-2,hour.length)+':'+minute.substring(minute.length-2,minute.length)+':'+
      second.substring(second.length-2,second.length);      return time;
}