java比较两个时间的大小

LocalDateTime inputTime = LocalDateTime.now();
            LocalDateTime specifiedTime = LocalDateTime.now();
            if (inputTime.isAfter(specifiedTime)) {
                System.out.println("输入的时间大于指定的时间");
                return DateUtils.parseDateToStr("yyyyMMddHHmm00", DateUtils.parseDate(time));
            } else {
                System.out.println("输入的时间小于或等于指定的时间");

                SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                Date date = format.parse(time);
                Calendar calendars = Calendar.getInstance(); // 创建一个Calendar对象
                calendars.setTime(date);
                int minute = calendars.get(Calendar.MINUTE); // 获取当前时间的分钟数

                int o = minute % 5;
                if(o<5){
                    Calendar calendar1 = Calendar.getInstance(); // 获取当前的日期和时间
                    calendar1.setTime(date);
                    calendar1.add(Calendar.MINUTE, (5-o));
                    date = calendar1.getTime();
                }
                return DateUtils.parseDateToStr("yyyyMMddHHmm00", date);
            }

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
 
public class Main {
    public static void main(String[] args) {
        String date1String = "2022-01-01 12:00:00";
        String date2String = "2022-01-01 10:00:00";
 
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            Date date1 = format.parse(date1String);
            Date date2 = format.parse(date2String);
 
            if (date1.getTime() > date2.getTime()) {
                System.out.println("date1在date2之后");
            } else if (date1.getTime() < date2.getTime()) {
                System.out.println("date1在date2之前");
            } else {
                System.out.println("date1和date2相等");
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}

import java.util.Date;
 
public class Main {
    public static void main(String[] args) {
        Date date1 = new Date();
        Date date2 = new Date();
        //Date和LocalDateTime都可以用compareTo（）方法
        //LocalDateTime date1 = LocalDateTime.now();
        //LocalDateTime date2 = LocalDateTime.now();
 
        if (date1.compareTo(date2) > 0) {
            System.out.println("date1在date2之后");
        } else if (date1.compareTo(date2) < 0) {
            System.out.println("date1在date2之前");
        } else {
            System.out.println("date1和date2相等");
        }
    }
}