gunshi-project-ss/src/main/java/com/gunshi/project/xyt/util/DateUtil.java

package com.gunshi.project.xyt.util;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.Optional;

/**
 * Description:
 * Created by wanyan on 2024/2/28
 *
 * @author wanyan
 * @version 1.0
 */
public class DateUtil {

    private static SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

    private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

    private static DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

    private static DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd日HH时");

    private static DateTimeFormatter ym = DateTimeFormatter.ofPattern("YYYYMM");

    public static Date convertStringToDate(String str){
        try {
            return df.parse(str);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    public static final ThreadLocal<SimpleDateFormat> sdfhmsS = new ThreadLocal<SimpleDateFormat>() {
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
        }
    };

    public static String convertDateToString(Date date){
        return sdf.format(date);
    }

    public static String convertDateToMDSString(Date date){
        return df.format(date);
    }

    /**
     * 年初
     * @param year
     * @return
     */
    public static LocalDateTime beginningOfYear(Integer year){
        return LocalDateTime.of(year, 1, 1, 0, 0, 0, 0);
    }

    /**
     * 年末
     * @param year
     * @return
     */
    public static LocalDateTime endOfYear(Integer year){
        return beginningOfYear(year).plusYears(1).minusSeconds(1);
    }



    /**
     * 将Date对象转换为LocalDateTime对象.
     *
     * @param date 需要转换的Date对象
     * @return 转换后的LocalDateTime对象
     */
    public static Optional<LocalDateTime> convertFromDate(Date date) {
        if (date == null) {
            throw new IllegalArgumentException("date is null");
        }

        Instant instant = date.toInstant();
        return Optional.of(instant.atZone(ZoneId.systemDefault()).toLocalDateTime());
    }


    public static String getIntegerTime(){
        LocalDateTime now = LocalDateTime.now();
        LocalDateTime roundedTime = now.withMinute(0).withSecond(0).withNano(0);
        return roundedTime.format(formatter);
    }

    public static String getMinusIntegerTime(){
        LocalDateTime yesterday = LocalDateTime.now().minusDays(1);
        LocalDateTime roundedTime = yesterday.withMinute(0).withSecond(0).withNano(0);
        return roundedTime.format(formatter);
    }

    public static String convertDH(String str){
        LocalDateTime dateTime = LocalDateTime.parse(str, formatter);
        return dateTime.format(dtf);
    }

    public static String getMinusTime(String str,long hour){
        LocalDateTime dateTime = LocalDateTime.parse(str, formatter);
        LocalDateTime minusTime = dateTime.minusHours(hour);
        return minusTime.format(formatter);
    }

    public static String getPlusTime(String str,long hour){
        LocalDateTime dateTime = LocalDateTime.parse(str, formatter);
        LocalDateTime minusTime = dateTime.plusHours(hour);
        return minusTime.format(formatter);
    }

    public static String getTodayEight(){
        LocalDateTime now = LocalDateTime.now();
        LocalDateTime roundedTime = now.withHour(8).withMinute(0).withSecond(0).withNano(0);
        return roundedTime.format(formatter);
    }

    public static Integer getMD(int year, int month) {
        if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
            return 31;
        } else if (month == 4 || month == 6 || month == 9 || month == 11) {
            return 30;
        } else if (month == 2) {
            //判断是否是闰年
            if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
                return 29;
            } else {
                return 28;
            }
        }
        return 31;
    }

    public static String getYM() {
        LocalDateTime now = LocalDateTime.now();
        return now.format(ym);
    }


}