192 lines
6.6 KiB
Java
192 lines
6.6 KiB
Java
package com.southern.power.grid.utils;
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import java.time.LocalDate;
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import java.time.LocalDateTime;
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import java.time.LocalTime;
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import java.time.format.DateTimeFormatter;
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import java.time.format.DateTimeParseException;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* 时间工具类
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*
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* @author: junzhangfm
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* @date: 2026/3/14
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**/
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public class TimeUtil {
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// 完整格式：年月日 时分
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private static final DateTimeFormatter FULL = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
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private static final DateTimeFormatter FULL_HOUR = DateTimeFormatter.ofPattern("yyyy/MM/dd HH时");
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// 仅小时格式
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private static final DateTimeFormatter HOUR = DateTimeFormatter.ofPattern("dd日HH时");
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// 三个区间常量
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public static final int BEFORE_8 = 1; // 小于当天早8点
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public static final int BETWEEN_8_20 = 2; // 早8点 ~ 晚8点(不含)
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public static final int AFTER_20 = 3; // 晚8点及以后
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/**
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* 获取开始时间到结束时间的小时数组，仅当天的第一条数据会展示年月日
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* 比如[2026/03/13/22, 13/23, 2026/03/14/00, 14/01]
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*
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* @param startTime 开始时间
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* @param endTime 结束时间
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* @return 结果
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*/
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public static List<String> generateHourList(String startTime, String endTime) {
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LocalDateTime start = LocalDateTime.parse(startTime, FULL);
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LocalDateTime end = LocalDateTime.parse(endTime, FULL);
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if (start.isAfter(end)) {
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throw new RuntimeException("generateHourList error! The endTime comes before the startTime.");
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}
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List<String> result = new ArrayList<>();
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LocalDateTime current = start;
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LocalDateTime preDate = null;
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while (!current.isAfter(end)) {
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// 第一次 或 日期发生变化（跨天0点）→ 显示完整年月日
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if (preDate == null || !current.toLocalDate().equals(preDate.toLocalDate())) {
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result.add(current.format(FULL_HOUR));
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} else {
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// 同一天 → 只显示小时
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result.add(current.format(HOUR));
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}
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preDate = current;
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current = current.plusHours(1);
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}
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return result;
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}
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/**
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* 获取开始时间到结束时间的小时数组，比如[2026-03-13 23:00, 2026-03-14 00:00, 2026-03-14 01:00]
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*
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* @param startTime 开始时间
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* @param endTime 结束时间
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* @return 结果
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*/
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public static List<String> generateHourListAll(String startTime, String endTime) {
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LocalDateTime start = LocalDateTime.parse(startTime, FULL);
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LocalDateTime end = LocalDateTime.parse(endTime, FULL);
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if (start.isAfter(end)) {
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throw new RuntimeException("generateHourList error! The endTime comes before the startTime.");
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}
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List<String> result = new ArrayList<>();
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LocalDateTime current = start;
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while (!current.isAfter(end)) {
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// 第一次 或 日期发生变化（跨天0点）→ 显示完整年月日
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result.add(current.format(FULL));
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current = current.plusHours(1);
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}
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return result;
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}
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/**
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* 获取开始日期到结束日期之间的所有日期（包含首尾）
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*/
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public static List<String> getBetweenDates(String startDate, String endDate) {
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DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
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List<String> dateList = new ArrayList<>();
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// 字符串转日期
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LocalDate start = LocalDate.parse(startDate, formatter);
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LocalDate end = LocalDate.parse(endDate, formatter);
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// 循环遍历每一天
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LocalDate current = start;
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while (!current.isAfter(end)) {
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dateList.add(current.format(formatter));
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current = current.plusDays(1);
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}
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return dateList;
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}
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/**
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* 获取指定日期 往前推n天 的日期
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*
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* @param dateStr 传入日期字符串 yyyy-MM-dd
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* @param num 前n天
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* @return 前n天日期字符串
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*/
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public static String getBeforeNumDays(String dateStr, int num) {
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DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
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// 字符串转日期
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LocalDate date = LocalDate.parse(dateStr, formatter);
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// 减去n天
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LocalDate beforeDay = date.minusDays(num);
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// 转回字符串
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return beforeDay.format(formatter);
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}
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/**
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* 获取前n个小时的时间
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*
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* @param dateTime 指定时间
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* @param beforeHourNum 前n小时，比如2
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* @param formatter 返回格式 比如yyyy-MM-dd HH:00
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* @return 前n小时的时间，比如2026-03-17 09:00
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*/
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public static String getBeforeHourTime(LocalDateTime dateTime, int beforeHourNum, DateTimeFormatter formatter) {
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// 2. 减去 n 小时（核心方法）
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LocalDateTime beforeHour = dateTime.minusHours(beforeHourNum);
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// 3. 格式化返回（精确到小时，分钟固定 00）
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return beforeHour.format(formatter);
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}
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/**
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* 获取前n天的时间
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*
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* @param dayTime 指定时间，比如2026-03-17
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* @param beforeDayNum 前n天，比如2
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* @return 前n天的日期，比如2026-03-15
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*/
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public static String getBeforeDate(String dayTime, int beforeDayNum) {
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return LocalDate.parse(dayTime).minusDays(beforeDayNum).toString();
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}
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private static final DateTimeFormatter DEFAULT_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
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public static LocalDateTime parseToLocalDateTime(String dateTimeStr) {
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if (dateTimeStr == null || dateTimeStr.isEmpty()) {
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return null;
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}
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try {
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return LocalDateTime.parse(dateTimeStr, DEFAULT_FORMATTER);
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} catch (DateTimeParseException e) {
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return null;
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}
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}
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/**
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* 判断【当前时间 + X小时】落在哪个时间段
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* @param hoursToAdd 要加的小时数 X
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* @return 1=早8点前, 2=8点~20点, 3=20点后
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*/
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public static int getTargetTimeRange(long hoursToAdd) {
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LocalDateTime now = LocalDateTime.now();
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// 当前时间 + X小时
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LocalDateTime targetTime = now.plusHours(hoursToAdd);
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// 当天 08:00
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LocalDateTime eightClock = targetTime.toLocalDate().atTime(LocalTime.of(8, 0));
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// 当天 20:00
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LocalDateTime twentyClock = targetTime.toLocalDate().atTime(LocalTime.of(20, 0));
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if (targetTime.isBefore(eightClock)) {
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return BEFORE_8;
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} else if (targetTime.isBefore(twentyClock)) {
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return BETWEEN_8_20;
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} else {
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return AFTER_20;
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}
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}
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}
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