计算日期到天数转换

import java.util.Scanner;


public class CountDays {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int year = scan.nextInt();
		int month = scan.nextInt();
		int day = scan.nextInt();
		int []a = {31,28,31,30,31,30,31,31,30,31,30,31};
		int []b = {31,29,31,30,31,30,31,31,30,31,30,31};
		
		if(year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
			countDays(b,month,day);
		else
			countDays(a, month, day);
		
	}

	private static void countDays(int[] arr, int month, int day) {
		int sum = 0;
		for (int i = 0; i < month-1; i++) {
			sum += arr[i];
		}
		sum += day;
		System.out.println(sum);
	}

}

计算日期到天数转换

原文：http://blog.csdn.net/liaction/article/details/47784033