如何强制Joda-Time仅解析String的一部分? [英] How to force Joda-Time to parse only part of String?

问题描述

假设我有以下日期(以字符串形式):

let's assume I have following dates (in String):

2009-05-15T23:00:00
2009-05-15T23:00:00.000Z 
2009-05-15

我不在乎时间和区域，只有日期与我有关.因此，我想尝试使用以下模式进行解析:

I don't care about the time and zone, only date is relevant for me. So I want to try to parse it with following pattern:

yyyy-MM-dd

yyyy-MM-dd

我尝试使用 Joda-Time 来解析它:

DateTimeFormat = DateTimeFormat.forPattern("yyyy-MM-dd");
format.withZone(zone).parseDateTime(string).toLocalDate();

我得到以下异常:

java.lang.IllegalArgumentException: Invalid format: "2009-05-15T23:00:00.000Z" is malformed at "T23:00:00.000Z"

有没有一种方法可以迫使Joda-Time忽略字符串的其余部分?

Is there a way how to force Joda-Time to ignore rest of the string?

推荐答案

我遇到了同样的问题，即多个日期格式，我只想忽略某一点之后的所有内容.我所做的是创建一个消耗所有DateTimeParser的对象，然后使用DateTimeFormatterBuilder将其添加.

I had the same problem, multiple date formats where I just wanted to ignore everything after a certain point. What I did was create a consume all DateTimeParser and then add that using a DateTimeFormatterBuilder.

我相信这会满足您的需求:

I believe this would meet your needs:

JodaDateTimeConsumeAll.java:

public class JodaDateTimeConsumeAll implements DateTimeParser{

    @Override
    public int estimateParsedLength() {
        return 100;
    }

    @Override
    public int parseInto(DateTimeParserBucket bucket, String text, int position) {
        return text.length(); //consume the whole thing
    }

}

FormatterBuilder:

DateTimeParser dtp = new DateTimeFormatterBuilder()
    .appendYear(4,4)
    .appendLiteral("-")
    .appendDayOfMonth(2)
    .appendLiteral("-")
    .appendMonthOfYear(2)
    .append(new JodaDateTimeConsumeAll())
    .toFormatter()
    .getParser();

我希望能帮上忙.

这篇关于如何强制Joda-Time仅解析String的一部分?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！