用JAVA语言简单写出程序 ，判断2013/9/13到2013/10/1日相差的天数！

  

package www.csdn.lipf;

import java.util.Calendar;

public class DateSub {

public static void main(String[] args) {
String date1 = "2013-9-13";
String date2 = "2013-10-1";

String[] d1 = date1.split("-");//将字符串拆分

int y1 = Integer.parseInt(d1[0]);//进行转换
int m1 = Integer.parseInt(d1[1]);
int da1 = Integer.parseInt(d1[2]);
String[] d2 = date2.split("-");
int y2 = Integer.parseInt(d2[0]);

int m2 = Integer.parseInt(d2[1]);

int da2 = Integer.parseInt(d2[2]);

Calendar c = Calendar.getInstance();

c.set(y1, (m1 - 1), da1);//设置值

//获取该天为该年中的第几天，然后相减即为结果

int x = c.get(Calendar.DAY_OF_YEAR);

c.set(y2, (m2 - 1), da2);

int y = c.get(Calendar.DAY_OF_YEAR);

System.out.println("2013-9-8到2013-10-1有：" + (y - x) + "天");

}

}