Scanner input =newScanner(System.in);
System.out.println("请按照如下格式输入日期(yyyy-MM-dd)");
String s = input.nextLine();
SimpleDateFormat f =newSimpleDateFormat("yyyy-MM-dd");
Date date = f.parse(s);
Calendar c = Calendar.getInstance();
c.setTime(date);
c.add(Calendar.DAY_OF_WEEK,7);
String s2 = f.format(c.getTime());
System.out.println("保质期为:"+ s2);
Date date1 =newDate();boolean b =(c.getTime()).after(date1);if(b){int a =(int)((c.getTime().getTime()- date1.getTime())/24/60/60/1000);
System.out.println("该商品没有过期,还有"+a+"天过期");}else{
System.out.println("该商品已经过期");}
input.close();