日期循环

 public static void loopDate() throws Exception {
	SimpleDateFormat formater = new SimpleDateFormat("yyyy-MM-dd");
	String sBegin = "2011-05-16";
	String sEnd = "2011-05-26";
	java.util.Date dateBegin = formater.parse(sBegin);
	java.util.Date dateEnd = formater.parse(sEnd);
	Calendar ca = Calendar.getInstance();
	while(dateBegin.compareTo(dateEnd) <= 0)
	{
	    System.out.println("下次比较日期：" + formater.format(dateBegin));
	    ca.setTime(dateBegin);
	    ca.add(ca.DATE, 1); // 把dateBegin加上1天然后重新赋值给date1
	    dateBegin = ca.getTime();
	}
 }