比较joda time API中的两个日期的问题

时间:2017-01-20 09:54:07

标签: java date jodatime

我有一个以下程序来比较两个日期。

我得到的是date1和currentTimestamp的时间戳,这里我只需要比较日期而不是时间值。但是下面的程序总是返回-1。(值)

'20:00' & '00:00' -> must be 4

如何比较日期而不考虑时间。请帮帮我。

更新:

我改为以下代码

'23:00' & '02:00' -> negative

这给我错误说“java.lang.IllegalArgumentException:找不到类型为:org.joda.time.LocalDate的即时转换器”

3 个答案:

答案 0 :(得分:0)

要在DateTimejoda进行比较,您有两个选项:

  • DateTime转换为LocalDate
  • 使用DateTimeComparator.getDateOnlyInstance

例如:

@Test
public void compareJodaTime() {
    DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss.SSS");

    String today = "2017-01-20 14:51:30.091";  
    String tomorrow = "2017-01-21 14:51:30.091"; 

    DateTime now = DateTime.now();

    Assert.assertThat(now.toLocalDate().compareTo(DateTime.parse(today, dateTimeFormatter).toLocalDate()), Matchers.is(0));
    Assert.assertThat(now.toLocalDate().compareTo(DateTime.parse(tomorrow, dateTimeFormatter).toLocalDate()), Matchers.is(-1));
    Assert.assertThat(now.toLocalDate().isEqual(DateTime.parse(today, dateTimeFormatter).toLocalDate()), Matchers.is(true));
    Assert.assertThat(now.toLocalDate().isBefore(DateTime.parse(tomorrow, dateTimeFormatter).toLocalDate()), Matchers.is(true));


    Assert.assertThat(DateTimeComparator.getDateOnlyInstance().compare(now, DateTime.parse(today, dateTimeFormatter)), Matchers.is(0));
    Assert.assertThat(DateTimeComparator.getDateOnlyInstance().compare(now, DateTime.parse(tomorrow, dateTimeFormatter)), Matchers.is(-1));
}

答案 1 :(得分:0)

这不是Joda解决方案......

使用:Apache库'commons-lang3-x.x.jar'(DateUtils)

@Test
public void testCompare() {
 Date current = new Date();
 Date previous = DateUtils.addHours(DateUtils.addDays(new Date(), -1),5);
 assertEquals(1,DateUtils.truncatedCompareTo(current,previous,Calendar.DATE));
 assertEquals(0,DateUtils.truncatedCompareTo(current,current,Calendar.DATE));
 assertEquals(-1,DateUtils.truncatedCompareTo(previous,current,Calendar.DATE));
}

答案 2 :(得分:0)

您可以使用JodaTime尝试此代码: DateTime date1 = DateTime.parse("2017-01-20 14:51:30.091", DateTimeFormat.forPattern("YYYY-MM-dd HH:mm:ss.SSS")); DateTime now = new DateTime(); int value = DateTimeComparator.getDateOnlyInstance().compare(date1 , now);