怎么把Joda Localdate转换成Joda DateTime? [英] How to convert Joda Localdate to Joda DateTime?

问题描述

我试图在执行更多计算之前将TimeZone信息简单地添加回LocalDate中. LocalDate来自使用ObjectLab LocalDateCalculator向现有的DateTime添加天数，但是该方法需要返回修改后的ReadableInstant来形成一个Interval，然后我可以检查该Interval.

I'm trying to simply add TimeZone information back into a LocalDate before performing some more calculations. The LocalDate came from using the ObjectLab LocalDateCalculator to add days to an existing DateTime but the method needs to return a modified ReadableInstant to form an Interval which I can then inspect.

我正在尝试的代码相当于将Joda LocalDate转换为Joda DateTime:

The code I'm trying amounts to a conversion of Joda LocalDate to Joda DateTime:

LocalDate contextLocalBusinessDate = calculator.getCurrentBusinessDate();
DateTime businessDateAsInContextLocation = new DateTime(contextLocalBusinessDate, contextTimeZone);

我收到的错误来自Joda的转换系统:

The error I get is from Joda's conversion system:

java.lang.IllegalArgumentException: No instant converter found for type: org.joda.time.LocalDate
        at org.joda.time.convert.ConverterManager.getInstantConverter(ConverterManager.java:165)
        at org.joda.time.base.BaseDateTime.<init>(BaseDateTime.java:147)
        at org.joda.time.DateTime.<init>(DateTime.java:192)

我正在寻找解决此问题的方法，或者是一种解决方法，它可以产生具有完整时区信息的准确间隔.

I'm looking for a fix to this problem, or a workaround that results in an accurate Interval with full timezone information.

推荐答案

There are various methods on LocalDate for this, including:

• LocalDate::toDateTimeAtCurrentTime()
• LocalDate::toDateTimeAtStartOfDay()
• LocalDate::toDateTime( LocalTime )
• 您必须明确要在生成的DateTime对象中添加时间分量，这就是DateTime的常规转换构造函数无法做到的原因.

  You have to be explicit about what you want the time component to be in the resulting DateTime object, which is why DateTime's general-conversion constructor can't do it.

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