时间比较

目标日期在当前日期之前：before  parse.before(date)

目标日期在当前日期之后：after   parse.after(date)

public static void main(String[] args) throws ParseException {
    SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
    String old = "2023-09-09";
    Date parse = sdf.parse(old);
    Date date = new Date();
    System.out.println(parse.before(date));
}