JDK1.8 日期工具类

最新推荐文章于 2023-12-05 13:41:11 发布

Target-z

最新推荐文章于 2023-12-05 13:41:11 发布

阅读量307

点赞数

CC 4.0 BY-SA版权

分类专栏： JAVA

本文链接：https://blog.youkuaiyun.com/qq_31897023/article/details/94553076

JAVA 专栏收录该内容

39 篇文章

订阅专栏

本文详细探讨了JDK1.8中引入的日期时间API改进，包括LocalDate, LocalTime, LocalDateTime等类的使用，以及日期时间的格式化与解析，展示了这些新特性如何简化日期处理操作。" 96189997,8312087,统计学③：总体与样本的区别及参数估计,"['统计学', '总体参数估计', '样本抽样', '分布理论', '中心极限定理']

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

直接见代码

package com.gjpzh.common.core.util;

import java.time.*;
import java.time.format.DateTimeFormatter;
import java.time.temporal.Temporal;

/**
 * 日期工具类
 */
public class DateTimeUtils {

    static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern("HHmmss");
    static final DateTimeFormatter MONTH_FORMATTER = DateTimeFormatter.ofPattern("yyyyMM");
    static final DateTimeFormatter SHORT_DATE_FORMATTER = DateTimeFormatter.ofPattern("yyMMdd");
    static final DateTimeFormatter SHORT_DATETIME_FORMATTER = DateTimeFormatter.ofPattern("yyMMddHHmmss");
    static final DateTimeFormatter DATETIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd");

    /**
     * 返回当前的日期
     *
     * @return
     */
    public static LocalDate getCurrentLocalDate() {
        return LocalDate.now();
    }

    /**
     * 返回当前时间
     *
     * @return
     */
    public static LocalTime getCurrentLocalTime() {
        return LocalTime.now();
    }

    /**
     * 返回当前日期时间
     *
     * @return
     */
    public static LocalDateTime getCurrentLocalDateTime() {
        return LocalDateTime.now();
    }

    /**
     * yyyyMMdd
     *
     * @return
     */
    public static String getCurrentDateStr() {
        return LocalDate.now().format(DATE_FORMATTER);
    }

    /**
     * yyMMdd
     *
     * @return
     */
    public static String getCurrentShortDateStr() {
        return LocalDate.now().format(SHORT_DATE_FORMATTER);
    }

    public static String getCurrentMonthStr() {
        return LocalDate.now().format(MONTH_FORMATTER);
    }

    /**
     * yyyyMMddHHmmss
     *
     * @return
     */
    public static String getCurrentDateTimeStr() {
        return LocalDateTime.now().format(DATETIME_FORMATTER);
    }

    /**
     * yyMMddHHmmss
     *
     * @return
     */
    public static String getCurrentShortDateTimeStr() {
        return LocalDateTime.now().format(SHORT_DATETIME_FORMATTER);
    }

    /**
     * HHmmss
     *
     * @return
     */
    public static String getCurrentTimeStr() {
        return LocalTime.now().format(TIME_FORMATTER);
    }

    public static String getCurrentDateStr(String pattern) {
        return LocalDate.now().format(DateTimeFormatter.ofPattern(pattern));
    }

    public static String getCurrentDateTimeStr(String pattern) {
        return LocalDateTime.now().format(DateTimeFormatter.ofPattern(pattern));
    }

    public static String getCurrentTimeStr(String pattern) {
        return LocalTime.now().format(DateTimeFormatter.ofPattern(pattern));
    }

    public static LocalDate parseLocalDate(String dateStr, String pattern) {
        return LocalDate.parse(dateStr, DateTimeFormatter.ofPattern(pattern));
    }

    public static LocalDateTime parseLocalDateTime(String dateTimeStr, String pattern) {
        return LocalDateTime.parse(dateTimeStr, DateTimeFormatter.ofPattern(pattern));
    }

    public static LocalTime parseLocalTime(String timeStr, String pattern) {
        return LocalTime.parse(timeStr, DateTimeFormatter.ofPattern(pattern));
    }

    public static String formatLocalDate(LocalDate date, String pattern) {
        return date.format(DateTimeFormatter.ofPattern(pattern));
    }

    public static String formatLocalDateTime(LocalDateTime datetime, String pattern) {
        return datetime.format(DateTimeFormatter.ofPattern(pattern));
    }

    public static String formatLocalTime(LocalTime time, String pattern) {
        return time.format(DateTimeFormatter.ofPattern(pattern));
    }

    public static LocalDate parseLocalDate(String dateStr) {
        return LocalDate.parse(dateStr, DATE_FORMATTER);
    }

    public static LocalDateTime parseLocalDateTime(String dateTimeStr) {
        return LocalDateTime.parse(dateTimeStr, DATETIME_FORMATTER);
    }

    public static LocalTime parseLocalTime(String timeStr) {
        return LocalTime.parse(timeStr, TIME_FORMATTER);
    }

    public static String formatLocalDate(LocalDate date) {
        return date.format(DATE_FORMATTER);
    }

    public static String formatLocalDateTime(LocalDateTime datetime) {
        return datetime.format(DATETIME_FORMATTER);
    }

    public static String formatLocalTime(LocalTime time) {
        return time.format(TIME_FORMATTER);
    }

    /**
     * 日期相隔天数
     *
     * @param startDateInclusive
     * @param endDateExclusive
     * @return
     */
    public static int periodDays(LocalDate startDateInclusive, LocalDate endDateExclusive) {
        return Period.between(startDateInclusive, endDateExclusive).getDays();
    }

    /**
     * 日期相隔小时
     *
     * @param startInclusive
     * @param endExclusive
     * @return
     */
    public static long durationHours(Temporal startInclusive, Temporal endExclusive) {
        return Duration.between(startInclusive, endExclusive).toHours();
    }

    /**
     * 日期相隔分钟
     *
     * @param startInclusive
     * @param endExclusive
     * @return
     */
    public static long durationMinutes(Temporal startInclusive, Temporal endExclusive) {
        return Duration.between(startInclusive, endExclusive).toMinutes();
    }

    /**
     * 日期相隔毫秒数
     *
     * @param startInclusive
     * @param endExclusive
     * @return
     */
    public static long durationMillis(Temporal startInclusive, Temporal endExclusive) {
        return Duration.between(startInclusive, endExclusive).toMillis();
    }

    /**
     * 是否当天
     *
     * @param date
     * @return
     */
    public static boolean isToday(LocalDate date) {
        return getCurrentLocalDate().equals(date);
    }

    public static Long toEpochMilli(LocalDateTime dateTime) {
        return dateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
    }
}