NextDay

/**
 * @category nextDay
 * @author liucanwen
 * @version v0.1 2011-1-13 19:57
 */
public class NextDay2
{
	public static void main(String[] args)
	{
		NextDay2 nd = new NextDay2();
		System.out.println(nd.getNextDay(2004, 2, 29));
	}
	public String getNextDay(int year, int month, int day)
	{
		//闰年、平年每月的天数
		int[][] days={{31,28,31,30,31,30,31,31,30,31,30,31},
					  {31,29,31,30,31,30,31,31,30,31,30,31}};
		
		//用index标识是什么年，index=0:平年，index=1:闰年	
		int index = year%4==0 && year%100!=0 || year%400==0? 1: 0;
		
		//判断输入日期是否正确
		if(month<1 || month>12 || day<1 || day>days[index][month-1])
			return "输入日期不正确";
		
		//小于输入月份的天数
		if(day < days[index][month-1])
			day++;
		else//等于输入月份的天数
		{
			//初始化day为1
			day = 1;
			//输入月份为12月
			if(month==12)
			{
				year++;
				month=1;
			}
			else
				month++;
		}
		return year + "-" + month + "-" + day;
	}
}