时间搓转换成时间格式

function set_time(str){
  var n = parseInt(str)*1000; 
  var D = new Date(n);
  var year = D.getFullYear();//四位数年份 
  var month = D.getMonth()+1;//月份(0-11),0为一月份 
  month = month<10?('0'+month):month; 
  var day = D.getDate();//月的某一天(1-31)  
  day = day<10?('0'+day):day;  
  var hours = D.getHours();//小时(0-23) 
  hours = hours<10?('0'+hours):hours; 
  var minutes = D.getMinutes();//分钟(0-59)  
  minutes = minutes<10?('0'+minutes):minutes; 
 // var seconds = D.getSeconds();//秒(0-59) 
 // seconds = seconds<10?('0'+seconds):seconds; 
 // var week = D.getDay();//周几(0-6),0为周日 
 // var weekArr = ['周日','周一','周二','周三','周四','周五','周六']; 
 var now_time = year+'-'+month+'-'+day+' '+hours+':'+minutes; 
 return now_time;},