毫秒转时间(java.js)

 SimpleDateFormat sdf = new SimpleDateFormat(
                 "yyyy-MM-dd HH:mm:ss");
         GregorianCalendar gc = new GregorianCalendar();
         gc.setTimeInMillis(1421915508113l);

         Date time2 = gc.getTime();
         String format = sdf.format(time2);
         System.out.println(format);

js

 var oldTime = (new Date("2011/11/11 20:10:10")).getTime(); //得到毫秒数
 var newTime = new Date(oldTime); //就得到普通的时间了