【JavaScript】时间戳转日期格式

时间戳： 1480570979000

    $.ajax({

                url : "getOrderMsg?shiplabel="+ shiplabel,
                type : "get",
                success : function(data) {//ajax返回的数据
                    var now = new Date(data.createtime); //data.createtime=1480570979000

var years=now.getYear(); 
var year = (years+"").substring(1); 
var month=now.getMonth()+1;
var date=now.getDate(); 
var hour=now.getHours(); 
var minute=now.getMinutes(); 
var second=now.getSeconds(); 
var date = "20"+year+"-"+month+"-"+date+" "+hour+":"+minute+":"+second; 
var html ="订单号:"+data.ordernumber+" 订单创建时间:"+date+" 收件人:"+data.shiptoname+" 电话:"+data.shiptophone+" 地址:"+data.addr; 
$("#p1").html(html).show(); } });