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本篇內(nèi)容主要講解“JAVA Date時間工具類的實例用法”，感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷，實用性強。下面就讓小編來帶大家學(xué)習(xí)“JAVA Date時間工具類的實例用法”吧!
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import java.text.ParseException;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.time.temporal.TemporalAdjusters;
import java.util.Date;
/**
* @description: 時間工具類
* @author: kejie.huang
* @date: Created in 2019/10/10 11:08
* @version:
* @modified By:
*/
public class DateUtils {
public static final String DATE_FORMART_YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
/**
* 指定日期加上天數(shù)后的日期
* @param num 為增加的天數(shù)
* @param currentDate 創(chuàng)建時間
* @return
* @throws ParseException
*/
public static Date plusDay(int num, Date currentDate) {
LocalDateTime localDateTime = dateConvertLocalDateTime(currentDate);
localDateTime = localDateTime.plusDays(num);
return localDateTimeConvertDate(localDateTime);
}
/**
* @description 根據(jù)時間字符串轉(zhuǎn)換成
* @return
* @author kejie.huang
* @date 2019/10/10 11:19
*/
public static Date dateStrConvertDate(String currentDate, String formateStr) {
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(formateStr);
LocalDateTime localDateTime = LocalDateTime.parse(currentDate, dateTimeFormatter);
return localDateTimeConvertDate(localDateTime);
}
/**
* @return
* @description 根據(jù)date轉(zhuǎn)換成localDateTime
* @author kejie.huang
* @date 2019/10/14 14:31
*/
private static LocalDateTime dateConvertLocalDateTime(Date date) {
LocalDateTime localDateTime = Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDateTime();
return localDateTime;
}
/**
* @return
* @description 方法描述 根據(jù)localDateTime轉(zhuǎn)換成date
* @author kejie.huang
* @date 2019/10/14 14:31
*/
public static Date localDateTimeConvertDate(LocalDateTime localDateTime) {
return Date.from(getZonedDateTimeByLocalDateTime(localDateTime).toInstant());
}
/**
* @description 根據(jù)時間轉(zhuǎn)換成時間字符串
* @return
* @author kejie.huang
* @date 2019/10/10 11:19
*/
public static String formatDateToParse(Date currentDate, String formateStr) {
LocalDateTime localDateTime = dateConvertLocalDateTime(currentDate);
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(formateStr);
return dateTimeFormatter.format(localDateTime);
}
/**
* @description 根據(jù)開始時間，結(jié)束時間進行對比
* @param startDate 開始時間
* @param endDate 結(jié)束時間
* @return
* @author kejie.huang
* @date 2019/10/10 11:16
*/
public static boolean compareDay(Date startDate, Date endDate) {
return startDate.before(endDate);
}
/**
* @title DateUtils
* @Description獲取本月第一天
* @author kejie.huang
* @Date 2019/10/14 10:52
* @Copyright 2019-2020
*/
public static Date getMonthFirstDay() {
LocalDateTime date = LocalDateTime.now();
LocalDateTime firstday = date.with(TemporalAdjusters.firstDayOfMonth());
return localDateTimeConvertDate(firstday);
}
/**
* @title DateUtils
* @Description獲取本月最后一天
* @author kejie.huang
* @Date 2019/10/14 10:52
* @Copyright 2019-2020
*/
public static Date getMonthLastDay() {
LocalDateTime date = LocalDateTime.now();
LocalDateTime lastday = date.with(TemporalAdjusters.lastDayOfMonth());
return localDateTimeConvertDate(lastday);
}
/**
* @title DateUtils
* @Description 根據(jù)localDateTime轉(zhuǎn)換成ZonedDateTime對象，用于把localDatTime轉(zhuǎn)成Date
* @author kejie.huang
* @Date 2019/10/14 11:03
* @Copyright 2019-2020
*/
public static ZonedDateTime getZonedDateTimeByLocalDateTime(LocalDateTime localDateTime) {
ZoneId zoneId = ZoneId.systemDefault();
ZonedDateTime zonedDateTime = localDateTime.atZone(zoneId);
return zonedDateTime;
}
/**
* @return
* @description 獲得某天最大時間 2019-10-14 23:59:59
* @author kejie.huang
* @date 2019/10/14 10:56
*/
public static Date getEndOfDay(Date date) {
LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(date.getTime()), ZoneId.systemDefault());
;
LocalDateTime endOfDay = localDateTime.with(LocalTime.MAX);
return localDateTimeConvertDate(endOfDay);
}
/**
* @return
* @description 獲得某天最小時間 2019-10-14 00:00:00
* @author kejie.huang
* @date 2019/10/14 10:57
*/
public static Date getStartOfDay(Date date) {
LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(date.getTime()), ZoneId.systemDefault());
LocalDateTime startOfDay = localDateTime.with(LocalTime.MIN);
return localDateTimeConvertDate(startOfDay);
}
}到此，相信大家對“JAVA Date時間工具類的實例用法”有了更深的了解，不妨來實際操作一番吧！這里是創(chuàng)新互聯(lián)網(wǎng)站，更多相關(guān)內(nèi)容可以進入相關(guān)頻道進行查詢，關(guān)注我們，繼續(xù)學(xué)習(xí)！
