import java.util.Calendar;
import java.util.TimeZone;

public class Test {

	  /**
	   * 获取距离系统时间N天后的日期时间信息
	   * 
	   * @author GaoHuanjie
	   */
	  public String getDateAfterNdays(int days){
		  Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+8"));
		  calendar.setTimeInMillis(System.currentTimeMillis()-1000L * 60 * 60 * 24 * days);
		  return calendar.get(Calendar.YEAR) + "-" + (calendar.get(Calendar.MONTH) + 1) + "-" + calendar.get(Calendar.DAY_OF_MONTH) + " "+ calendar.get(Calendar.HOUR_OF_DAY) + ":" + calendar.get(Calendar.MINUTE) + ":" + calendar.get(Calendar.SECOND);   
	  }
	
	public static void main(String[] args) {
		System.out.println(new Test().getDateAfterNdays(2));
	}
}