日期天数计算

Posted 2021-06-16 之墨_

天数计算

public class DateTest{

public static void main(String[] args) throws ParseException{

	Scanner input = new Scanner(System.in);
	
	System.out.println("请输入起始时间：（格式yyyy-MM-dd）");
	
	String day1 = input.next();
	
	SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
	
	long before = sdf.parsen(day1).getTime();
	
	long now = new Date().getTime();
	
	long time = (now-before)/1000/60/60/24;  
	
	System.out.println(day1+"至今已有"+time+"天");
	
}

}