夏令时 SimpleTimeZone

 String dateS = "20101130 02:00:00 AM";//NewYork Time
 // String dateS = "20101030 02:00:00 AM";//NewYork Time   

 
      SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd HH:mm:ss a");
      //TimeZone zone = TimeZone.getTimeZone("EST5EDT");
      SimpleTimeZone szone = new SimpleTimeZone(-18000000,//Base GMT offset
              "America/New_York",
              Calendar.MARCH, 8, -Calendar.SUNDAY,//Second Sunday in March
              7200000,
              Calendar.NOVEMBER, 1, -Calendar.SUNDAY,//Last Sunday in NOVEMBER
              7200000,
              3600000);//1 hour

     // System.out.println(szone.useDaylightTime());
      sdf.setTimeZone(szone);
      Date date = sdf.parse(dateS);

     //Convert to Chinese Time
      SimpleTimeZone zoneC = new SimpleTimeZone(8*3600000,"Asia/Shanghai");
    //TimeZone zoneC = TimeZone.getTimeZone("CST");
      Calendar ca =new GregorianCalendar(zoneC);
      ca.setTime(date);
  
  
   SimpleDateFormat sdfC = new SimpleDateFormat("yyyyMMdd HH:mm:ss");
   sdfC.setTimeZone(zoneC);
   System.out.println(sdfC.format(ca.getTime()));//20101130 15:00:00(20101030 14:00:00 )