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工具类:
package com.kingboy.common.utils.date;
import java.time.*;
import java.time.format.DateTimeFormatter; import java.time.temporal.ChronoUnit; import java.time.temporal.TemporalUnit; import java.util.Date;/*
* @author kingboy * @Date 2017/7/22 下午2:12 * @Description LocalDateTimeUtils is used to Java8中的时间类 */ public class LocalDateTimeUtils {//获取当前时间的LocalDateTime对象
//LocalDateTime.now();//根据年月日构建LocalDateTime
//LocalDateTime.of();//比较日期先后
//LocalDateTime.now().isBefore(), //LocalDateTime.now().isAfter(),//Date转换为LocalDateTime
public static LocalDateTime convertDateToLDT(Date date) { return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()); }//LocalDateTime转换为Date
public static Date convertLDTToDate(LocalDateTime time) { return Date.from(time.atZone(ZoneId.systemDefault()).toInstant()); } //获取指定日期的毫秒 public static Long getMilliByTime(LocalDateTime time) { return time.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli(); }//获取指定日期的秒
public static Long getSecondsByTime(LocalDateTime time) { return time.atZone(ZoneId.systemDefault()).toInstant().getEpochSecond(); }//获取指定时间的指定格式
public static String formatTime(LocalDateTime time,String pattern) { return time.format(DateTimeFormatter.ofPattern(pattern)); }//获取当前时间的指定格式
public static String formatNow(String pattern) { return formatTime(LocalDateTime.now(), pattern); }//日期加上一个数,根据field不同加不同值,field为ChronoUnit.*
public static LocalDateTime plus(LocalDateTime time, long number, TemporalUnit field) { return time.plus(number, field); }//日期减去一个数,根据field不同减不同值,field参数为ChronoUnit.*
public static LocalDateTime minu(LocalDateTime time, long number, TemporalUnit field){ return time.minus(number,field); }/**
* 获取两个日期的差 field参数为ChronoUnit.* * @param startTime * @param endTime * @param field 单位(年月日时分秒) * @return */ public static long betweenTwoTime(LocalDateTime startTime, LocalDateTime endTime, ChronoUnit field) { Period period = Period.between(LocalDate.from(startTime), LocalDate.from(endTime)); if (field == ChronoUnit.YEARS) return period.getYears(); if (field == ChronoUnit.MONTHS) return period.getYears() * 12 + period.getMonths(); return field.between(startTime, endTime); }//获取一天的开始时间,2017,7,22 00:00
public static LocalDateTime getDayStart(LocalDateTime time) { return time.withHour(0) .withMinute(0) .withSecond(0) .withNano(0); }//获取一天的结束时间,2017,7,22 23:59:59.999999999
public static LocalDateTime getDayEnd(LocalDateTime time) { return time.withHour(23) .withMinute(59) .withSecond(59) .withNano(999999999); }}
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