一、返回 LocalDateTime 格式的起止时间


/*** @Description:返回 LocalDateTime 格式的日、周、月、季度、年起止时间* @Author: lsiyan* @Date: 2020/8/21 22:47*/
import java.time.*;
import java.time.temporal.TemporalAdjusters;/*** jdk8 获取当天，本周，本月，本季度，本年起始时间工具类 LocalDateTime*/
public class LocalDateTimeUtils {public static final String MinTime = "T00:00:00";public static final String MaxTime = "T23:59:59.999999999";/*** @Description:当天的开始时间* @Param: [today, isFirst: true 表示开始时间，false表示结束时间]*/public static LocalDateTime getStartOrEndDayOfDay(LocalDate today, Boolean isFirst){LocalDate resDate = LocalDate.now();if (today == null) {today = resDate;}if(isFirst){return LocalDateTime.of(today, LocalTime.MIN);}else{return LocalDateTime.of(today, LocalTime.MAX);}}/*** @Description:本周的开始时间* @Param: [today, isFirst: true 表示开始时间，false表示结束时间]*/public static LocalDateTime getStartOrEndDayOfWeek(LocalDate today, Boolean isFirst){String time = MinTime;LocalDate resDate = LocalDate.now();if (today == null) {today = resDate;}DayOfWeek week = today.getDayOfWeek();int value = week.getValue();if (isFirst) {resDate = today.minusDays(value - 1);} else {resDate = today.plusDays(7 - value);time = MaxTime;}LocalDateTime localDateTime = LocalDateTime.parse(resDate.toString() + time);return localDateTime;}/*** @Description:本月的开始时间* @Param: [today, isFirst: true 表示开始时间，false表示结束时间]*/public static LocalDateTime getStartOrEndDayOfMonth(LocalDate today, Boolean isFirst){String time = MinTime;LocalDate resDate = LocalDate.now();if (today == null) {today = resDate;}Month month = today.getMonth();int length = month.length(today.isLeapYear());if (isFirst) {resDate = LocalDate.of(today.getYear(), month, 1);} else {resDate = LocalDate.of(today.getYear(), month, length);time = MinTime;}LocalDateTime localDateTime = LocalDateTime.parse(resDate.toString() + time);return localDateTime;}/*** @Description:本季度的开始时间* @Param: [today, isFirst: true 表示开始时间，false表示结束时间]*/public static LocalDateTime getStartOrEndDayOfQuarter(LocalDate today, Boolean isFirst){String time = MinTime;LocalDate resDate = LocalDate.now();if (today == null) {today = resDate;}Month month = today.getMonth();Month firstMonthOfQuarter = month.firstMonthOfQuarter();Month endMonthOfQuarter = Month.of(firstMonthOfQuarter.getValue() + 2);if (isFirst) {resDate = LocalDate.of(today.getYear(), firstMonthOfQuarter, 1);} else {resDate = LocalDate.of(today.getYear(), endMonthOfQuarter, endMonthOfQuarter.length(today.isLeapYear()));time = MaxTime;}LocalDateTime localDateTime = LocalDateTime.parse(resDate.toString() + time);return localDateTime;}/*** @Description:本年度的开始时间* @Param: [today, isFirst: true 表示开始时间，false表示结束时间]*/public static LocalDateTime getStartOrEndDayOfYear(LocalDate today, Boolean isFirst){String time = MinTime;LocalDate resDate = LocalDate.now();if (today == null) {today = resDate;}if (isFirst) {resDate = LocalDate.of(today.getYear(), Month.JANUARY, 1);} else {resDate = LocalDate.of(today.getYear(), Month.DECEMBER, Month.DECEMBER.length(today.isLeapYear()));time = MaxTime;}LocalDateTime localDateTime = LocalDateTime.parse(resDate.toString() + time);return localDateTime;}

二、返回 String 格式的起止时间


/*** @Description:返回 String 格式的周、月、季度、年起止时间* @Author: lsiyan* @Date: 2020/8/21 22:47*/
import java.time.*;
import java.time.temporal.TemporalAdjusters;/*** jdk8 获取本周，本月，本季度，本年起始时间工具类 String*/
public class LocalDateTimeUtils {//本周的开始时间public static String getStartOrEndDayOfWeek(LocalDate today, Boolean isFirst){LocalDate resDate = LocalDate.now();if (today == null) {today = resDate;}DayOfWeek week = today.getDayOfWeek();int value = week.getValue();if (isFirst) {resDate = today.minusDays(value - 1);} else {resDate = today.plusDays(7 - value);}return resDate.toString();}//本月的开始时间public static String getStartOrEndDayOfMonth(LocalDate today, Boolean isFirst){LocalDate resDate = LocalDate.now();if (today == null) {today = resDate;}Month month = today.getMonth();int length = month.length(today.isLeapYear());if (isFirst) {resDate = LocalDate.of(today.getYear(), month, 1);} else {resDate = LocalDate.of(today.getYear(), month, length);}return resDate.toString();}//本季度开始时间public static String getStartOrEndDayOfQuarter(LocalDate today, Boolean isFirst){LocalDate resDate = LocalDate.now();if (today == null) {today = resDate;}Month month = today.getMonth();Month firstMonthOfQuarter = month.firstMonthOfQuarter();Month endMonthOfQuarter = Month.of(firstMonthOfQuarter.getValue() + 2);if (isFirst) {resDate = LocalDate.of(today.getYear(), firstMonthOfQuarter, 1);} else {resDate = LocalDate.of(today.getYear(), endMonthOfQuarter, endMonthOfQuarter.length(today.isLeapYear()));}return resDate.toString();}//本年度开始时间public static String getStartOrEndDayOfYear(LocalDate today, Boolean isFirst){LocalDate resDate = LocalDate.now();if (today == null) {today = resDate;}if (isFirst) {resDate = LocalDate.of(today.getYear(), Month.JANUARY, 1);} else {resDate = LocalDate.of(today.getYear(), Month.DECEMBER, Month.DECEMBER.length(today.isLeapYear()));}return resDate.toString();}public static void main(String[] args) {System.out.println("本周开始时间>>>" + getStartOrEndDayOfWeek(null, true));System.out.println("本周结束时间>>>" + getStartOrEndDayOfWeek(null, false));System.out.println("本月开始时间>>>" + getStartOrEndDayOfMonth(null, true));System.out.println("本月结束时间>>>" + getStartOrEndDayOfMonth(null, false));System.out.println("本季度开始时间>>>" + getStartOrEndDayOfQuarter(null, true));System.out.println("本季度结束时间>>>" + getStartOrEndDayOfQuarter(null, false));System.out.println("本年开始时间>>>" + getStartOrEndDayOfYear(null, true));System.out.println("本年结束时间>>>" + getStartOrEndDayOfYear(null, false));}
}

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Java8 LocalDateTime 获取当前日周月年的起止时间

Java8 LocalDateTime 常见使用_获取当天、本周、本月、本季度、本年度起止时间

一、返回 LocalDateTime 格式的起止时间

二、返回 String 格式的起止时间

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