Java SimpleDateFormat的时区带有冒号分隔符?

我有以下格式的日期: 2010-03-01T00:00:00-08:00

我向它抛出了以下SimpleDateFormats来对其进行解析:

private static final SimpleDateFormat[] FORMATS = {

new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ"), //ISO8601 long RFC822 zone

new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz"), //ISO8601 long long form zone

new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss"), //ignore timezone

new SimpleDateFormat("yyyyMMddHHmmssZ"), //ISO8601 short

new SimpleDateFormat("yyyyMMddHHmm"),

new SimpleDateFormat("yyyyMMdd"), //birthdate from NIST IHE C32 sample

new SimpleDateFormat("yyyyMM"),

new SimpleDateFormat("yyyy") //just the year

};

我有一个使用如下格式的便捷方法:

public static Date figureOutTheDamnDate(String wtf) {

if (wtf == null) {

return null;

}

Date retval = null;

for (SimpleDateFormat sdf : FORMATS) {

try {

sdf.setLenient(false)

retval = sdf.parse(wtf);

System.out.println("Date:" + wtf + " hit on pattern:" + sdf.toPattern());

break;

} catch (ParseException ex) {

retval = null;

continue;

}

}

return retval;

}

它似乎已击中该模式,yyyyMMddHHmm但将日期返回为Thu Dec 03 00:01:00 PST 2009。

解析此日期的正确模式是什么?

更新:我不需要时区解析。我不希望在区域之间移动对时间敏感的问题,但是如何解析“ -08:00”区域格式???

单元测试:

@Test

public void test_date_parser() {

System.out.println("\ntest_date_parser");

//month is zero based, are you effing kidding me

Calendar d = new GregorianCalendar(2000, 3, 6, 13, 00, 00);

assertEquals(d.getTime(), MyClass.figureOutTheDamnDate("200004061300"));

assertEquals(new GregorianCalendar(1950, 0, 1).getTime(), MyClass.figureOutTheDamnDate("1950"));

assertEquals(new GregorianCalendar(1997, 0, 1).getTime(), MyClass.figureOutTheDamnDate("199701"));

assertEquals(new GregorianCalendar(2010, 1, 25, 15, 19, 44).getTime(), MyClass.figureOutTheDamnDate("20100225151944-0800"));

//my machine happens to be in GMT-0800

assertEquals(new GregorianCalendar(2010, 1, 15, 13, 15, 00).getTime(),MyClass.figureOutTheDamnDate("2010-02-15T13:15:00-05:00"));

assertEquals(new GregorianCalendar(2010, 1, 15, 18, 15, 00).getTime(), MyClass.figureOutTheDamnDate("2010-02-15T18:15:00-05:00"));

assertEquals(new GregorianCalendar(2010, 2, 1).getTime(), MyClass.figureOutTheDamnDate("2010-03-01T00:00:00-08:00"));

assertEquals(new GregorianCalendar(2010, 2, 1, 17, 0, 0).getTime(), MyClass.figureOutTheDamnDate("2010-03-01T17:00:00-05:00"));

}

单元测试的输出:

test_date_parser

Date:200004061300 hit on pattern:yyyyMMddHHmm

Date:1950 hit on pattern:yyyy

Date:199701 hit on pattern:yyyyMM

Date:20100225151944-0800 hit on pattern:yyyyMMddHHmmssZ

Date:2010-02-15T13:15:00-05:00 hit on pattern:yyyy-MM-dd'T'HH:mm:ss

Date:2010-02-15T18:15:00-05:00 hit on pattern:yyyy-MM-dd'T'HH:mm:ss

Date:2010-03-01T00:00:00-08:00 hit on pattern:yyyy-MM-dd'T'HH:mm:ss

Date:2010-03-01T17:00:00-05:00 hit on pattern:yyyy-MM-dd'T'HH:mm:ss

回答:

JodaTime的DateTimeFormat救援:

String dateString = "2010-03-01T00:00:00-08:00";

String pattern = "yyyy-MM-dd'T'HH:mm:ssZ";

DateTimeFormatter dtf = DateTimeFormat.forPattern(pattern);

DateTime dateTime = dtf.parseDateTime(dateString);

System.out.println(dateTime); // 2010-03-01T04:00:00.000-04:00

(时区和时区的差异toString()仅是因为我在GMT-4,并且没有明确设置语言环境)

如果要结束java.util.Date使用DateTime#toDate()

Date date = dateTime.toDate();

等待JDK7(JSR-310) JSR-310,如果你想在标准Java SE API中使用更好的格式化程序,则引用实现称为ThreeTen(希望它将实现到Java 8中)。SimpleDateFormat在时区表示法中,当前确实不会吃掉冒号。

更新:根据更新,你显然不需要时区。这应该与SimpleDateFormat。只需Z在模式中忽略它。

String dateString = "2010-03-01T00:00:00-08:00";

String pattern = "yyyy-MM-dd'T'HH:mm:ss";

SimpleDateFormat sdf = new SimpleDateFormat(pattern);

Date date = sdf.parse(dateString);

System.out.println(date); // Mon Mar 01 00:00:00 BOT 2010

(根据我的时区是正确的)

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