joda time

군데군데서 퍼와서 테스트해봤네요. 출처를 까먹음 죄송^^

Joda time api

package com.tistory.tazz009; import static org.hamcrest.CoreMatchers.is; import static org.junit.Assert.assertThat; import org.joda.time.Chronology; import org.joda.time.DateTime; import org.joda.time.DateTimeZone; import org.joda.time.Days; import org.joda.time.Duration; import org.joda.time.Interval; import org.joda.time.LocalDate; import org.joda.time.Months; import org.joda.time.PeriodType; import org.joda.time.Weeks; import org.joda.time.Years; import org.joda.time.chrono.GregorianChronology; import org.junit.Test; public class JodaTimeTest { @Test // 예제1, 2: 1일 후 구하기 public void shouldGetAfterOneDay() { final String pattern1 = "yyyy.MM.dd"; final String pattern2 = "yyyy-MM-dd"; LocalDate today = new LocalDate(); System.out.println("today : " + today.toString(pattern1)); Chronology chrono = GregorianChronology.getInstance(); LocalDate theDay = new LocalDate(1582, 10, 4, chrono); assertThat(theDay.toString(pattern1), is("1582.10.04")); assertThat(theDay.toString(pattern2), is("1582-10-04")); LocalDate nextDay = theDay.plusDays(1); assertThat(nextDay.toString(pattern1), is("1582.10.05")); } @Test // 예제3, 4: 1시간 후 구하기 public void shouldGetAfterOneHour() { final String pattern1 = "yyyy.MM.dd HH:mm"; DateTime today = new DateTime(); System.out.println("toDay : " + today.toString(pattern1)); DateTimeZone seoul = DateTimeZone.forID("Asia/Seoul"); DateTime theTime = new DateTime(1961, 8, 9, 23, 59, seoul); System.out.println("theTime : " + theTime.toString(pattern1)); assertThat(theTime.toString(pattern1), is("1961.08.09 23:59")); } @Test public void joda_basic() { final String pattern1 = "yyyy.MM.dd HH:mm"; DateTime today = new DateTime(); System.out.println("toDay : " + today.toString(pattern1)); DateTime plusHours = today.plusHours(1); System.out.println("plusHours : " + plusHours.toString(pattern1)); Duration dur = new Duration(today, plusHours); System.out.println("dur : " + dur); DateTime plus = today.plus(dur); System.out.println("plus : " + plus.toString(pattern1)); } @Test public void joda_periods() throws Exception { final String pattern1 = "yyyy.MM.dd HH:mm"; DateTime aTime = new DateTime("1972-09-03"); DateTime bTime = new DateTime(); System.out.println("aTime : " + aTime.toString(pattern1)); System.out.println("bTime : " + bTime.toString(pattern1)); int days = Days.daysBetween(aTime, bTime).getDays(); int weeks = Weeks.weeksBetween(aTime, bTime).getWeeks(); int months = Months.monthsBetween(aTime, bTime).getMonths(); int years = Years.yearsBetween(aTime, bTime).getYears(); System.out.println("days : " + days); System.out.println("weeks : " + weeks); System.out.println("months : " + months); System.out.println("years : " + years); Interval interval = new Interval(aTime, bTime); System.out.println("interval.toDuration().getStandardDays() : " + interval.toDuration().getStandardDays()); System.out.println("interval.toPeriod(PeriodType.days()).getDays() : " + interval.toPeriod(PeriodType.days()).getDays()); System.out.println("interval.toPeriod(PeriodType.weeks()).getWeeks() : " + interval.toPeriod(PeriodType.weeks()).getWeeks()); System.out.println("interval.toPeriod(PeriodType.months()).getMonths() : " + interval.toPeriod(PeriodType.months()).getMonths()); System.out.println("interval.toPeriod(PeriodType.years()).getYears() : " + interval.toPeriod(PeriodType.years()).getYears()); } }

<dependency> <groupId>joda-time</groupId> <artifactId>joda-time</artifactId> <version>2.3</version> </dependency>