JAVA获得当前日期时间字符串

public final static String getTimeString() {
  String TimeString = "";
  Calendar c = Calendar.getInstance();

  int yyyy = c.get(Calendar.YEAR);
  int mm = c.get(Calendar.MONTH) + 1;
  int dd = c.get(Calendar.DAY_OF_MONTH);
  int hh = c.get(Calendar.HOUR) + 8;//中国属于东八区，时间加8小时
  int MM = c.get(Calendar.MINUTE);
  int SS = c.get(Calendar.SECOND);

  String sMonth = mm < 10 ? "0" + mm : "" + mm;
  String sDay = dd < 10 ? "0" + dd : "" + dd;
  String sHour = hh < 10 ? "0" + hh : "" + hh;
  String sMinute = MM < 10 ? "0" + MM : "" + MM;
  String sSecond = SS < 10 ? "0" + SS : "" + SS;

  TimeString = yyyy + "." + sMonth + "." + sDay + " " + sHour + ":"+ sMinute + ":" + sSecond;

  return TimeString;
 }