java获取日期

1：可以获取当前的系统时间其格式为 20081204144342

public class DateUtil {

  public static String getNow_YMDHMS(){
   
     Calendar c=Calendar.getInstance();
   
     String year=String.valueOf(c.get(Calendar.YEAR));
   
     String month=String.valueOf(c.get(Calendar.MONTH)+1);
     if(month.length()==1){
      month="0"+month;
     }
   
     String day=String.valueOf(c.get(Calendar.DAY_OF_MONTH));
     if(day.length()==1){
      day="0"+day;
     }
   
     String hour=String.valueOf(c.get(Calendar.HOUR_OF_DAY));
     if(hour.length()==1){
      hour="0"+hour;
     }
   
     String minute=String.valueOf(c.get(Calendar.MINUTE));
     if(minute.length()==1){
      minute="0"+minute;
     }
   
     String second=String.valueOf(c.get(Calendar.SECOND));
     if(second.length()==1){
      second="0"+second;
     }
     String ymdhms=year+month+day+hour+minute+second;
     return ymdhms;
  }

  public static void main(String[] args) {
  
    String precise_time = getNow_YMDHMS();
     System.out.println(precise_time);
  }