JAVA日期转换工具类
2024-04-26 03:25:22
java中经常会用到日期的转换，所有自己整理了一套日期转换的工具类，方便使用。
首先导入
<dependency><groupId>joda-time</groupId><artifactId>joda-time</artifactId><version>2.10.5</version></dependency>
工具类编写
package com.xxximport org.joda.time.DateTime;
import org.joda.time.Period;
import org.joda.time.format.DateTimeFormat;import java.time.LocalDate;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;public final class DateFormatter {/** Date Format String: "yyyyMMdd" */public static final String PATTERN_yyyyMMdd = "yyyyMMdd";/** Date Format String "yyyy年MM月dd日"*/public static final String yyyyMMdd ="yyyy年MM月dd日";/** Date Format String: "yyyy-MM-dd" */public static final String PATTERN_yyyy_MM_dd = "yyyy-MM-dd";/** Date Format String: "HHmmss" */public static final String PATTERN_HHmmss = "HHmmss";/** Date Format String: "HH:mm:ss" */public static final String PATTERN_HH_mm_ss = "HH:mm:ss";/** Date Format String: "yyyyMMddHHmmss" */public static final String PATTERN_yyyyMMddHHmmss = "yyyyMMddHHmmss";/** Date Format String: "yyyy-MM-dd HH:mm:ss" */public static final String PATTERN_yyyy_MM_dd_HH_mm_ss = "yyyy-MM-dd HH:mm:ss";/** Date Format String: "yyyy-MM-dd HH:mm" */public static final String PATTERN_yyyy_MM_dd_HH_mm = "yyyy-MM-dd HH:mm";/** Date Format String: "HH:mm" */public static final String PATTERN_HH_mm = "HH:mm";/** Date Format String: "HHmmssSSS" */public static final String PATTERN_HHmmssSSS = "HHmmssSSS";/** Date Format String: "yyyy-MM/dd", used in: file store etc. */public static final String PATTERN_DATEPATH = "yyyy-MM/dd";private DateFormatter() {}/*** Format date using pattern.* * @param pattern* {@link DateTimeFormat} patterns* @param date* date to format* @return formatted string for date*/public static String format(final String pattern, final Date date) {if (date==null) {return null;}return new DateTime(date).toString(pattern);}/*** Format calendar using pattern.* * @param pattern* {@link DateTimeFormat} patterns* @param calendar* calendar to format* @return formatted string for calendar*/public static String format(final String pattern, final Calendar calendar) {if (calendar==null) {return null;}return new DateTime(calendar).toString(pattern);}/*** Parse string to date using pattern.* * @param pattern* {@link DateTimeFormat} patterns* @param date* date string to parse* @return parsed date*/public static Date parse(final String pattern, final String date) {if (date==null) {return null;}return DateTimeFormat.forPattern(pattern).parseDateTime(date).toDate();}// ========================================================================/*** Format current date using pattern.* * @param pattern* {@link DateTimeFormat} patterns* @return formatted string for current date*/public static String format(final String pattern) {return format(pattern, now());}// ========================================================================// ========================================================================/*** Format date using pattern {@link #PATTERN_yyyyMMdd "yyyyMMdd"}.* * @param date* date to format* @return formatted string for date*/public static String yyyyMMdd(final Date date) {return format(PATTERN_yyyyMMdd, date);}public static String yyyyMMdd2(final Date date) {return format(yyyyMMdd, date);}/*** Format calendar using pattern {@link #PATTERN_yyyyMMdd "yyyyMMdd"}.* * @param calendar* calendar to format* @return formatted string for calendar*/public static String yyyyMMdd(final Calendar calendar) {return format(PATTERN_yyyyMMdd, calendar);}/*** Format current date using {@link #PATTERN_yyyyMMdd "yyyyMMdd"}.* * @return formatted string for current date*/public static String yyyyMMdd() {return format(PATTERN_yyyyMMdd, now());}/*** Parse date string using {@link #PATTERN_yyyyMMdd "yyyyMMdd"}.* * @param date* date string to parse* @return parsed date*/public static Date yyyyMMdd(final String date) {return parse(PATTERN_yyyyMMdd, date);}// ========================================================================/*** Format date string using pattern {@link #PATTERN_HHmmss "HHmmss"}.* * @param date* date to format* @return formatted string for date*/public static String HHmmss(final Date date) {return format(PATTERN_HHmmss, date);}/*** Format calendar using pattern {@link #PATTERN_HHmmss "HHmmss"}.* * @param calendar* calendar to format* @return formatted string for calendar*/public static String HHmmss(final Calendar calendar) {return format(PATTERN_HHmmss, calendar);}/*** Format current date using {@link #PATTERN_HHmmss "HHmmss"}.* * @return formatted string for current date*/public static String HHmmss() {return format(PATTERN_HHmmss, now());}/*** Parse date string using {@link #PATTERN_HHmmss "HHmmss"}.* * @param date* date string to parse* @return parsed date*/public static Date HHmmss(final String date) {return parse(PATTERN_HHmmss, date);}// ========================================================================/*** Format date using {@link #PATTERN_yyyy_MM_dd "yyyy-MM-dd"}.* * @param date* date to format* @return formatted string for date*/public static String yyyy_MM_dd(final Date date) {return format(PATTERN_yyyy_MM_dd, date);}/*** Format calendar using {@link #PATTERN_yyyy_MM_dd "yyyy-MM-dd"}.* * @param calendar* calendar to format* @return formatted string for calendar*/public static String yyyy_MM_dd(final Calendar calendar) {return format(PATTERN_yyyy_MM_dd, calendar);}/*** Format current date using {@link #PATTERN_yyyy_MM_dd "yyyy-MM-dd"}.* * @return formatted string for current date*/public static String yyyy_MM_dd() {return format(PATTERN_yyyy_MM_dd, now());}/*** Parse date string using {@link #PATTERN_yyyy_MM_dd "yyyy-MM-dd"}.* * @param date* date string to parse* @return parsed date*/public static Date yyyy_MM_dd(final String date) {return parse(PATTERN_yyyy_MM_dd, date);}// ========================================================================public static String HH_mm_ss(final Date date) {return format(PATTERN_HH_mm_ss, date);}public static String HH_mm_ss(final Calendar calendar) {return format(PATTERN_HH_mm_ss, calendar);}public static String HH_mm_ss() {return format(PATTERN_HH_mm_ss, now());}public static Date HH_mm_ss(final String date) {return parse(PATTERN_HH_mm_ss, date);}// ========================================================================public static String yyyyMMddHHmmss(final Date date) {return format(PATTERN_yyyyMMddHHmmss, date);}public static String yyyyMMddHHmmss(final Calendar calendar) {return format(PATTERN_yyyyMMddHHmmss, calendar);}public static String yyyyMMddHHmmss() {return format(PATTERN_yyyyMMddHHmmss, now());}public static Date yyyyMMddHHmmss(final String date) {return parse(PATTERN_yyyyMMddHHmmss, date);}// ========================================================================public static String yyyy_MM_dd_HH_mm_ss(final Date date) {return format(PATTERN_yyyy_MM_dd_HH_mm_ss, date);}public static String yyyy_MM_dd_HH_mm_ss(final Calendar calendar) {return format(PATTERN_yyyy_MM_dd_HH_mm_ss, calendar);}public static String yyyy_MM_dd_HH_mm_ss() {return format(PATTERN_yyyy_MM_dd_HH_mm_ss, now());}public static Date yyyy_MM_dd_HH_mm_ss(final String date) {return parse(PATTERN_yyyy_MM_dd_HH_mm_ss, date);}public static void main(String[] args) {System.out.println(System.currentTimeMillis());}// ========================================================================public static String yyyy_MM_dd_HH_mm(final Date date) {return format(PATTERN_yyyy_MM_dd_HH_mm, date);}public static String yyyy_MM_dd_HH_mm(final Calendar calendar) {return format(PATTERN_yyyy_MM_dd_HH_mm, calendar);}public static String yyyy_MM_dd_HH_mm() {return format(PATTERN_yyyy_MM_dd_HH_mm, now());}public static Date yyyy_MM_dd_HH_mm(final String date) {return parse(PATTERN_yyyy_MM_dd_HH_mm, date);}// ========================================================================public static String HH_mm(final Date date) {return format(PATTERN_HH_mm, date);}public static String HH_mm(final Calendar calendar) {return format(PATTERN_HH_mm, calendar);}public static String HH_mm() {return format(PATTERN_HH_mm, now());}public static Date HH_mm(String date) {return parse(PATTERN_HH_mm, date);}// ========================================================================/*** Format date string using pattern {@link #PATTERN_HHmmssSSS "HHmmssSSS"}.* * @param date* @return*/public static String HHmmssSSS(final Date date) {return format(PATTERN_HHmmssSSS, date);}public static String HHmmssSSS(final Calendar date) {return format(PATTERN_HHmmssSSS, date);}public static String HHmmssSSS() {return format(PATTERN_HHmmssSSS, now());}public static Date HHmmssSSS(String date) {return parse(PATTERN_HHmmssSSS, date);}// ========================================================================/*** @see DateTime#now()* @return current DateTime (eg. new Date())*/public static Date now() {Date date = new Date();return date;}/*** @see Calendar#getInstance()* @return currentCalendar*/public static Calendar calendar() {return DateTime.now().toCalendar(Locale.getDefault());}/*** @see System#currentTimeMillis()* @return the difference, measured in milliseconds, between the current* time and midnight, January 1, 1970 UTC.*/public static long millis() {return System.currentTimeMillis();}public static final int MILLIS_PER_SECOND = 1000;public static final int SECONDS_PER_MINUTE = 60;public static final int MINUTES_PER_HOUR = 60;public static final int HOURS_PER_DAY = 24;public static final int DAYS_PER_WEEK = 7;/*** Get current date with time 00:00:00.* * @return current date with time: 00:00:00*/public static Date startOfDay() {return startOfDay(now());}public static Date endOfDay() {return endOfDay(now());}/*** Get gived date with time: 00:00:00.* * @param date* given date* @return gived date with time: 00:00:00*/public static Date startOfDay(final Date date) {return new DateTime(date.getTime()).withTimeAtStartOfDay().toDate();}public static Date endOfDay(final Date date) {return new DateTime(date.getTime()).millisOfDay().withMaximumValue().toDate();}/*** Get current month first day with time: 00:00:00.* * @return current month first day with time: 00:00:00*/public static Date startOfMonth() {return startOfMonth(now());}/*** Get month first day with time: 00:00:00 of given date.* * @param date* given date* @return first day of month with time: 00:00:00 for given date.*/public static Date startOfMonth(final Date date) {return new DateTime(date.getTime()).dayOfMonth().withMinimumValue().withTimeAtStartOfDay().toDate();}public static Date endOfMonth() {return DateTime.now().dayOfMonth().withMaximumValue().millisOfDay().withMaximumValue().toDate();}public static Date endOfMonth(final Date date) {return new DateTime(date.getTime()).dayOfMonth().withMaximumValue().millisOfDay().withMaximumValue().toDate();}public static Date startOfWeek() {return DateTime.now().dayOfWeek().withMinimumValue().withTimeAtStartOfDay().toDate();}public static Date startOfWeek(final Date date) {return new DateTime(date.getTime()).dayOfWeek().withMinimumValue().withTimeAtStartOfDay().toDate();}public static Date endOfWeek() {return DateTime.now().dayOfWeek().withMaximumValue().millisOfDay().withMaximumValue().toDate();}public static Date endOfWeek(final Date date) {return new DateTime(date).dayOfWeek().withMaximumValue().millisOfDay().withMaximumValue().toDate();}public static boolean expiredSeconds(final Date from, final int seconds) {return expiredSeconds(from, now(), seconds);}public static boolean expiredSeconds(final Date from, final Date to, final int seconds) {return new DateTime(from).plusSeconds(seconds).isBefore(to.getTime());}public static boolean expiredMinutes(final Date from, final int minutes) {return expiredMinutes(from, now(), minutes);}public static boolean expiredMinutes(final Date from, final Date to, final int minutes) {return new DateTime(from).plusMinutes(minutes).isBefore(to.getTime());}public static boolean expiredHours(final Date from, final int hours) {return expiredHours(from, now(), hours);}public static boolean expiredHours(final Date from, final Date to, final int hours) {return new DateTime(from).plusHours(hours).isBefore(to.getTime());}public static boolean expiredDays(final Date from, final int days) {return expiredDays(from, now(), days);}public static boolean expiredDays(final Date from, final Date to, final int days) {return new DateTime(from).plusDays(days).isBefore(to.getTime());}public static boolean expiredMonth(final Date from, final int month) {return expiredMonth(from, now(), month);}public static boolean expiredMonth(final Date from, final Date to, final int months) {return new DateTime(from).plusMonths(months).isBefore(to.getTime());}public static boolean sameDay(final Date from) {return sameDay(from, now());}public static boolean sameDay(final Date from, final Date to) {return startOfDay(from).equals(startOfDay(to));}public static boolean sameWeek(final Date from) {return sameWeek(from, now());}public static boolean sameWeek(final Date from, final Date to) {return startOfWeek(from).equals(startOfWeek(to));}public static int days(Date from, Date to) {from = startOfDay(from);to = startOfDay(to);return (int) ((to.getTime() - from.getTime()) / (1000 * 3600 * 24));}public static String datePath() {return format(PATTERN_DATEPATH);}public static String datePath(Date date) {return format(PATTERN_DATEPATH, date);}public static java.sql.Date sqlDate(Date date) {return new java.sql.Date(date.getTime());}public static java.sql.Date sqlDate() {return sqlDate(now());}public static java.sql.Time sqlTime(Date date) {return new java.sql.Time(date.getTime());}public static java.sql.Time sqlTime() {return sqlTime(now());}public static java.sql.Timestamp sqlTimestamp(Date date) {return new java.sql.Timestamp(date.getTime());}public static java.sql.Timestamp sqlTimestamp() {return sqlTimestamp(now());}public static Date nextYear(Date from) {return nextYear(from, 1);}public static Date previousYear(Date from) {return nextYear(from, -1);}public static Date nextDay(Date from) {return nextDay(from, 1);}public static Date previousDay(Date from) {return nextDay(from, -1);}public static Date nextWeek(Date from) {return nextWeek(from, 1);}public static Date previousWeek(Date from) {return nextDay(from, -1);}public static Date nextMonth(Date from) {return nextMonth(from, 1);}public static Date previousMonth(Date from) {return nextMonth(from, -1);}public static Date nextHour(Date from) {return nextHour(from, 1);}public static Date previousHour(Date from) {return nextHour(from, -1);}public static Date previousSeconds(Date from) {return nextSeconds(from, -1);}public static Date nextYear(Date from, int years) {return new DateTime(from).plusYears(years).toDate();}public static Date nextDay(Date from, int days) {return new DateTime(from).plusDays(days).toDate();}public static Date nextWeek(Date from, int weeks) {return new DateTime(from).plusWeeks(weeks).toDate();}public static Date nextMonth(Date from, int months) {return new DateTime(from).plusMonths(months).toDate();}public static Date nextHour(Date from, int hours) {return new DateTime(from).plusHours(hours).toDate();}public static Date nextSeconds(Date from, int seconds) {return new DateTime(from).plusSeconds(seconds).toDate();}public static Date next(Date from, Period period) {return new DateTime(from).plus(period).toDate();}public static Date next(Period period) {return DateTime.now().plus(period).toDate();}@SuppressWarnings("deprecation")public static int months(Date from, Date to) {return (to.getMonth() - from.getMonth()) + (to.getYear() - from.getYear()) *12;}/*** LocalDate转Date* @param localDate* @return*/public static Date localDate2Date(LocalDate localDate) {if(null == localDate) {return null;}ZonedDateTime zonedDateTime = localDate.atStartOfDay(ZoneId.systemDefault());return Date.from(zonedDateTime.toInstant());}/*** Date转换成LocalDate* @param date* @return*/public static LocalDate date2LocalDate(Date date) {if(null == date) {return null;}return date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();}}简单方便，可以直接使用！！！
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