package com.ruoyi.buss.common;
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import java.text.DecimalFormat;
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import java.time.*;
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import java.time.format.DateTimeFormatter;
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import java.util.Calendar;
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import java.util.Date;
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public class DateUtils {
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public static Date setToNextDayZero(Date originalDate) {
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Calendar calendar = Calendar.getInstance();
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calendar.setTime(originalDate);
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// 增加一天
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calendar.add(Calendar.DAY_OF_MONTH, 1);
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// 设置为零点
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calendar.set(Calendar.HOUR_OF_DAY, 0);
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calendar.set(Calendar.MINUTE, 0);
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calendar.set(Calendar.SECOND, 0);
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calendar.set(Calendar.MILLISECOND, 0);
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return calendar.getTime();
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}
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/**
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* 获取两个日期之间的天数差
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* @param date1
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* @param date2
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* @return
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*/
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public static long getSubtractOfTowDate(Date date1, Date date2) {
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// 计算毫秒差
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long diffMillis = Math.abs(date2.getTime() - date1.getTime());
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// 转换为天数并向上取整
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double days = (double) diffMillis / (24 * 60 * 60 * 1000);
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long roundedDays = (long) Math.ceil(days);
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return roundedDays;
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}
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/**
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* 获取两个日期之间的小时数差
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* @param date1
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* @param date2
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* @return
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*/
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public static double getDisHourOfTowDate(Date date1, Date date2) {
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// 将Date转换为Instant
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Instant instant1 = date1.toInstant();
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Instant instant2 = date2.toInstant();
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// 计算持续时间
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Duration duration = Duration.between(instant1, instant2);
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// 获取总秒数并转换为小时（向上取整）
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long totalSeconds = duration.getSeconds();
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int hours = (int) Math.ceil((double) totalSeconds / 3600);
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return hours;
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}
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/**
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* 根据开始时间startTime，获取hours小时后的具体时间
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* @param startDate
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* @param hours
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* @return
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*/
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public static Date getDateAfterHours(Date startDate, int hours) {
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// 把Date转换为LocalDateTime
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LocalDateTime localDateTime = startDate.toInstant()
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.atZone(ZoneId.systemDefault())
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.toLocalDateTime();
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// 加上指定的小时数
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LocalDateTime newDateTime = localDateTime.plusHours(hours);
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// 再转回Date类型
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Instant instant = newDateTime.atZone(ZoneId.systemDefault()).toInstant();
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return Date.from(instant);
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}
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/**
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* 判断两个时间是否在同一天内
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* @param date1
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* @param date2
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* @return
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*/
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public static boolean isSameDay(Date date1, Date date2) {
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// 转换为LocalDate（忽略时区，使用系统默认时区）
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LocalDate localDate1 = date1.toInstant()
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.atZone(ZoneId.systemDefault())
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.toLocalDate();
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LocalDate localDate2 = date2.toInstant()
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.atZone(ZoneId.systemDefault())
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.toLocalDate();
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// 判断是否为同一天
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return localDate1.isEqual(localDate2);
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}
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public static void main(String[] args) {
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String date1 = "2025-05-21 21:10:00";
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String date2 = "2025-05-22 23:20:00";
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DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
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// 解析字符串为LocalDateTime
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LocalDateTime localDateTime1 = LocalDateTime.parse(date1, formatter);
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LocalDateTime localDateTime2 = LocalDateTime.parse(date2, formatter);
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// 转换为Date（需要指定时区，这里使用系统默认时区）
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Instant instant1 = localDateTime1.atZone(ZoneId.systemDefault()).toInstant();
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Instant instant2 = localDateTime2.atZone(ZoneId.systemDefault()).toInstant();
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Date date11 = Date.from(instant1);
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Date date22 = Date.from(instant2);
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long result = getSubtractOfTowDate(date11, date22);
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System.out.println(result);
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}
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}
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