import java.time.Duration;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Scanner;/*** 情侣计算在一起的时间，天，时，分，秒* @author silence*/
public class Demo2 {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-M-d HH:mm:ss");while (true) {System.out.println("请输入日期:(列：1970-01-01)");String next = scanner.next();LocalDateTime start = null;try {//格式化起始时间,提供默认时间输入日期的0时0分0秒start = LocalDateTime.parse(next + " 00:00:00", formatter);} catch (Exception e) {System.out.println("输入的日期格式错误，请输入正确的日期格式如：1970-01-01");continue;}//获得当前时间LocalDateTime end = LocalDateTime.now();//计算时间间隔Duration between = Duration.between(start, end);long days = between.toDays();//获取此持续时间内的小时数。long hours = between.toHours();//获取此持续时间的分钟数。long minutes = between.toMinutes();//获取此持续时间内的秒数。long seconds = between.getSeconds();//如果输入的时间大于当前的分钟，重新输入if (minutes <= 0) {System.out.println("不能输入当前时间之后的时间日期");continue;}System.out.println("输入的日期距离现在有：" + days + "天" + hours + "小时" + minutes + "分钟"+seconds+"秒");break;}}
}