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!824 DateUtil 新增了获取本月最后一天,是否为本月最后一天

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Merge pull request !824 from 特立独行的猪/v5-dev
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Looly 2022-09-30 10:59:38 +00:00 committed by Gitee
commit 8e5553a4aa
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2 changed files with 28 additions and 0 deletions
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20
hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
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@ -2247,6 +2247,26 @@ public class DateUtil extends CalendarUtil {
return startTime.before(realEndTime) && endTime.after(realStartTime); return startTime.before(realEndTime) && endTime.after(realStartTime);
} }
/**
* 是否为本月最后一天
* @param dateTime {@link DateTime}
* @return 是否为本月最后一天
* @since 5.8.8
*/
public static boolean isLastDayOfMonth(DateTime dateTime){
return dateTime.dayOfMonth()==getLastDayOfMonth(dateTime);
}
/**
* 获得本月的最后一天
* @param dateTime {@link DateTime}
* @return 天
* @since 5.8.8
*/
public static int getLastDayOfMonth(DateTime dateTime){
return Month.getLastDay(dateTime.month(),dateTime.isLeapYear());
}
// ------------------------------------------------------------------------ Private method start // ------------------------------------------------------------------------ Private method start
/** /**

8
hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
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@ -1094,4 +1094,12 @@ public class DateUtilTest {
DateUtil.parse(sourceStr)); DateUtil.parse(sourceStr));
Assert.assertTrue(between); Assert.assertTrue(between);
} }
@Test
public void isLastDayTest(){
DateTime dateTime = DateUtil.parse("2022-09-30");
int dayOfMonth = DateUtil.getLastDayOfMonth(dateTime);
Assert.assertEquals(dayOfMonth,dateTime.dayOfMonth());
Assert.assertTrue("not is last day of this month !!",DateUtil.isLastDayOfMonth(dateTime));
}
} }