long-article-manage/long-article-server/src/main/java/com/tzld/piaoquan/longarticle/utils/DateUtil.java

package com.tzld.piaoquan.longarticle.utils;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;

public class DateUtil {

    public static Date getThatDayDate() {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(new Date());
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        return calendar.getTime();
    }

    private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss");

    public static long convertToTimestamp(String timeString) {
        LocalTime localTime = LocalTime.parse(timeString, formatter);
        LocalDate today = LocalDate.now();
        LocalDateTime localDateTime = LocalDateTime.of(today, localTime);
        return localDateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
    }

    public static String getThatDayDateString() {
        DateTimeFormatter dateFormat = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate today = LocalDate.now();
        return dateFormat.format(today);
    }

    public static String getTomorrowDateString() {
        DateTimeFormatter dateFormat = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate tomorrow = LocalDate.now().minusDays(-1);
        return dateFormat.format(tomorrow);
    }

    public static String getBeforeDayDateString(String format) {
        DateTimeFormatter dateFormat = DateTimeFormatter.ofPattern(format);
        LocalDate today = LocalDate.now();
        LocalDate yesterday = today.minusDays(1);
        return dateFormat.format(yesterday);
    }


}