java中两个日期比大小

        SimpleDateFormat slf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date = new Date();
        Date date1 = null;
        String d = "2023-1-1 11:11:11";
        try {
            date1 = slf.parse(d);
        } catch (ParseException e) {
            System.out.println(e.getMessage());
        }
        if (date.after(date1)) {
            System.out.println("date>date1 输入这里");
            System.out.println(slf.format(date));
            System.out.println(slf.format(date1));
        } else if (date.before(date1)) {
            System.out.println("date<date1 输入这里");
            System.out.println(slf.format(date));
            System.out.println(slf.format(date1));
        }
        //compareTo 方法
        //是对象比较
        //大于 返1
        //等于 返0
        //小于 返 -1
        int i = date.compareTo(date1);
        System.out.println(i);