package org.example;import cn.hutool.core.collection.CollUtil;import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.YearMonth;
import java.time.temporal.TemporalAdjusters;
import java.util.Date;/*** @author 50649*/
public class TestDate {public static void main(String[] args) throws ParseException {String dateString = "2023-04";String[]str = dateString.split("-");int year = Integer.valueOf(str[0]);int month = Integer.valueOf(str[1]);// 指定年份和月份，例如2023年3月YearMonth yearMonth = YearMonth.of(year, month);// 获取该月的最后一天LocalDate lastDay = yearMonth.atEndOfMonth();// 获取当前月份的最后一天LocalDate lastDayOfMonth = lastDay.with(TemporalAdjusters.lastDayOfMonth());// 设置时间为23:59:59LocalTime time = LocalTime.of(23, 59, 59);// 组合日期和时间LocalDateTime lastDayOfMonthEndTime = LocalDateTime.of(lastDayOfMonth, time);System.out.println("lastDayOfMonthEndTime==="+lastDayOfMonthEndTime);}}
