import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;
public static void live() throws Exception {
System.out.println("请输入你的生日 YYYY-MM-DD:");
String birthdayStr = new Scanner(System.in).next();//birthdayStr
SimpleDateFormat spf = new SimpleDateFormat("yyyy-MM-dd");
Date birthDate = spf.parse(birthdayStr);//生日的 Date日期
long birthTime = birthDate.getTime();//时间戳时间
long nowTime = new Date().getTime();//时间戳时间
long betweenTime = (nowTime-birthTime);
long days = betweenTime/1000/60/60/24; //毫秒->秒->分->小时->天
System.out.println("从出生到现在 你过了"+days+"天");
}