package com.monkeylessey.utils;
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import com.monkeylessey.enums.WeekEnum;
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import com.monkeylessey.exception.BaseException;
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import org.springframework.util.StringUtils;
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import javax.annotation.Nullable;
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import java.sql.Timestamp;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.time.*;
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import java.time.temporal.TemporalAdjusters;
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import java.util.*;
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/**
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* 日期工具类
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*
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* @author xiangpei
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* @date 2023/7/7
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*/
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public class DateUtil {
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private static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
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/**
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* 获取某天的开始时间
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*
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* @param date
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* @return 2023-01-01 00:00:00
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*/
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public static Date getDayStart(@Nullable Date date) {
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if (Objects.isNull(date)) {
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date = new Date();
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}
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LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.of("GMT+8"));
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LocalDateTime of = LocalDateTime.of(localDateTime.getYear(), localDateTime.getMonth(), localDateTime.getDayOfMonth(), 0, 0, 0);
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return Timestamp.valueOf(of);
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}
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/**
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* 获取某天的结束时间
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*
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* @param date
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* @return 2023-01-01 23:59:59
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*/
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public static Date getDayEnd(@Nullable Date date) {
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if (Objects.isNull(date)) {
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date = new Date();
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}
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LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
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LocalDateTime of = LocalDateTime.of(localDateTime.getYear(), localDateTime.getMonth(), localDateTime.getDayOfMonth(), 23, 59, 59);
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return Timestamp.valueOf(of);
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}
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/**
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* 获取某月的第一天
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*
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* @param date 2023-01-05
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* @return 2023-01-01
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*/
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public static Date getMonthStart(@Nullable Date date) {
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if (Objects.isNull(date)) {
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date = new Date();
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}
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LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
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LocalDateTime start = localDateTime.with(TemporalAdjusters.firstDayOfMonth());
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return Timestamp.valueOf(start);
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}
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/**
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* 获取某月的最后一天
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*
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* @param date
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* @return
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*/
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public static Date getMonthEnd(@Nullable Date date) {
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if (Objects.isNull(date)) {
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date = new Date();
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}
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LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
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LocalDateTime end = localDateTime.with(TemporalAdjusters.lastDayOfMonth());
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return Timestamp.valueOf(end);
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}
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/**
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* 获取某年的最后一天
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*
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* @param date
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* @return
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*/
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public static Date getYearEnd(@Nullable Date date) {
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if (Objects.isNull(date)) {
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date = new Date();
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}
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LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
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LocalDateTime end = localDateTime.with(TemporalAdjusters.lastDayOfYear());
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return Timestamp.valueOf(end);
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}
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/**
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* 获取某年的第一天
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*
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* @param date
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* @return
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*/
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public static Date getYearStart(@Nullable Date date) {
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if (Objects.isNull(date)) {
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date = new Date();
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}
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LocalDateTime localDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
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LocalDateTime end = localDateTime.with(TemporalAdjusters.firstDayOfYear());
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return Timestamp.valueOf(end);
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}
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/**
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* 获取某天是星期几
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*
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* @param date
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*/
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public static WeekEnum getWeek(@Nullable Date date) {
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if (Objects.isNull(date)) {
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date = new Date();
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}
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Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+8"));
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int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
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for (WeekEnum weekDay : WeekEnum.values()) {
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if (weekDay.getCode() == dayOfWeek) {
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return weekDay;
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}
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}
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return null;
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}
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/**
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* 格式化日期
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*
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* @param date
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* @param pattern
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* @return
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*/
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public static String formatDate(@Nullable Date date, @Nullable String pattern) {
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if (Objects.isNull(date)) {
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date = new Date();
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}
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if (!StringUtils.hasText(pattern)) {
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pattern = DEFAULT_DATE_FORMAT;
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}
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SimpleDateFormat format = new SimpleDateFormat(pattern);
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return format.format(date);
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}
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/**
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* 获取时间段内的每一天 每一月 每一年
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*
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* @param startDate
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* @param endDate
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* @param dateType
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* @return
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*/
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public static List<String> getEveryItem(Date startDate, Date endDate, DateType dateType) throws ParseException {
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if (Objects.isNull(startDate) || Objects.isNull(endDate)) {
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throw new BaseException("传入时间不能为空");
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}
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checkTimeSize(startDate, endDate);
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int diffNumber = 1;
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List<String> result = new ArrayList<>(10);
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Calendar calendar = Calendar.getInstance();
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calendar.setTime(startDate);
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SimpleDateFormat format;
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switch (dateType) {
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case DAY:
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format = new SimpleDateFormat("yyyy-MM-dd");
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diffNumber = (int) Math.abs((format.parse(format.format(startDate)).getTime() - format.parse(format.format(endDate)).getTime()) / (1000 * 3600 * 24)) + 1;
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getEveryResult(diffNumber, format, calendar, Calendar.DAY_OF_MONTH, result);
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break;
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case MONTH:
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format = new SimpleDateFormat("yyyy-MM");
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Period between = Period.between(dateToLocal(format.parse(format.format(startDate))), dateToLocal(format.parse(format.format(endDate))));
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diffNumber = between.getMonths() + between.getYears() * 12 + 1;
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getEveryResult(diffNumber, format, calendar, Calendar.MONTH, result);
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break;
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case YEAR:
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format = new SimpleDateFormat("yyyy");
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diffNumber = Period.between(dateToLocal(format.parse(format.format(startDate))), dateToLocal(format.parse(format.format(endDate)))).getYears() + 1;
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getEveryResult(diffNumber, format, calendar, Calendar.YEAR, result);
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default:
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break;
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}
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return result;
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}
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/**
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* 获取时间范围内的天、月、年
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*
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* @param diffNumber
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* @param format
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* @param calendar
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* @param calendarDateType
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* @param result
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*/
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private static void getEveryResult(int diffNumber, SimpleDateFormat format, Calendar calendar, int calendarDateType, List<String> result) {
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for (int i = 0; i < diffNumber; i++) {
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result.add(format.format(calendar.getTime()));
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calendar.add(calendarDateType, 1);
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}
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}
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/**
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* 检验开始时间不能大于结束时间
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*
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* @param startDate
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* @param endDate
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*/
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public static void checkTimeSize(Date startDate, Date endDate) {
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if (startDate.after(endDate)) {
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throw new BaseException("开始时间不能大于结束时间");
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}
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}
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/**
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* date 转 localDate
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*
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* @param date
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* @return
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*/
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public static LocalDate dateToLocal(Date date) {
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if (Objects.isNull(date)) {
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throw new BaseException("传入时间不能为空");
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}
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Instant instant = date.toInstant();
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return instant.atZone(ZoneId.systemDefault()).toLocalDate();
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}
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public enum DateType {
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DAY("获取时间段的每一天"),
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MONTH("获取时间段的每一个月"),
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YEAR("获取时间段的每一年");
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private final String desc;
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DateType(String desc) {
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this.desc = desc;
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}
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}
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}
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