Date manipulation tools Case

 <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.0.7</version>
        </dependency>

package com.example.demo.hutool;

import cn.hutool.core.date.DateTime;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.date.Week;

import java.util.Calendar;
import java.util.Date;

/**
 * @program: demo->DateDemo
 * @description:
 * @author: cxy
 * @create: 2019-12-12 09:21
 * * / 
Public  class DateDemo {
     public  static  void main (String [] args) {
         // Get the type of the result to the current date 10:18:11 2019-12-12 
        the DateTime DATE = DateUtil.date ();
         // obtained the current date type results 10:18:11 2019-12-12 
        the DateTime date1 = DateUtil.date (System.currentTimeMillis ());
         // Get the type of the result to the current date 10:18:11 2019-12-12 
        a date DATE2 = DateUtil.date ();
         // Analyzing date comparison 
        Boolean = before DateUtil.date () before (date1);.
         //   Get time type "yyyy-MM-dd"
        . DateUtil.date String S = () toString ( " YYYY-the MM-dd " );
         // after the current time to 
        the DateTime now = DateTime.Now ();

        Calendar Calendar = DateUtil.calendar ();
         // Get data milliseconds 
        Long timeInMillis = calendar.getTimeInMillis ();
         // get the current seconds 
        Long L = DateUtil.currentSeconds ();
         // Get the current day of the month 
        int I = DateUtil.thisDayOfMonth ();
         // get the first few days of the week 
        int I1 = DateUtil.thisDayOfWeek ();
         // get the date in English 
        Week Week = DateUtil.thisDayOfWeekEnum ();
         // Gets hours 
        int i2 = DateUtil.thisHour ( to true );
         //Year to get the current time 
        int i3 = DateUtil.thisYear ();
         // Get the current quarter time 
        DateTime dateTime = DateUtil.beginOfQuarter (now);
         // get the current quarter, which belongs 
        String s1 = DateUtil.yearAndQuarter (now) .substring ( 4 );
         // get the current time time 10:39:08 
        String s2 = DateUtil.formatTime (now);
         // get the start time of the day 
        DateTime dateTime1 = DateUtil.beginOfDay (now);
         // get the end of the day 
        DateTime = datetime2 DateUtil.endOfDay (now);

        System.out.println(date);
        System.out.println(date1);
        System.out.println(date2);
        System.out.println(before);
        System.out.println(s);
        System.out.println(timeInMillis);
        System.out.println(l);
        System.out.println(i);
        System.out.println(i1);
        System.out.println(i2);
        System.out.println(i3);
        System.out.println(week);
        System.out.println(dateTime);
        System.out.println(s1);
        System.out.println(s2);
        System.out.println(dateTime1);
        System.out.println(dateTime2);
    }
}

l