java关于时间的问题

[辻弎郎]

public static String addDay(String kssj, int n) throws ParseException {
			
			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
			Calendar cd = Calendar.getInstance();
			cd.setTime(sdf.parse(kssj));
			
			for(int i=0;i<=n;i++){
				cd.add(Calendar.DATE, i);// 增加一天
				System.out.println("1111111111111:"+sdf.format(cd.getTime()));
			// cd.add(Calendar.MONTH, n);
			// 增加一个月
			}
			return sdf.format(cd.getTime());
	}
	
	public static void main(String[] args) throws ParseException {
		DataTimeBiz biz=new DataTimeBiz();
		biz.addDay("2012-03-04", 10);
//		int tian=biz.tianshu("2012-04-01", "2012-04-12");
//		for (int i = 0; i <= tian; i++) {
//			biz.addDay("2012-04-01",i );
//			System.out.println("........................................................................");
//		}
		
	}

通过此方法显示的时间不对 啊