Date.plus在2.5.4 Groovy Runtime中不起作用，替代方法是什么? [英] Date.plus not working in 2.5.4 Groovy Runtime, what is the alternative?

问题描述

我们要在当前日期中添加天数，并以特定方式设置其格式.在Groovy 2.4.13中解决了该问题，并且以下日期操作可以正常工作:

We want to add days to the current date and format it in a specific way. This was solved in Groovy 2.4.13 and the following date manipulation works fine:

​today = new Date()+90;today.format('yyyy-MM-dd HH:mm:ss.S');

结果:2019-12-02 08:07:15.294

Result: 2019-12-02 08:07:15.294

在Groovy 2.5.4中，相同的表达式引发此异常:

In Groovy 2.5.4 the same expression throws this exception:

groovy.lang.MissingMethodException:没有方法的签名:java.util.Date.plus()适用于参数类型:(整数)值:[90]可能的解决方案:parse(java.lang.String)，split(groovy.lang.Closure)，use([Ljava.lang.Object;)，is(java.lang.Object)，wait()，clone()在Script1.run(Script1.groovy:3)

groovy.lang.MissingMethodException: No signature of method: java.util.Date.plus() is applicable for argument types: (Integer) values: [90] Possible solutions: parse(java.lang.String), split(groovy.lang.Closure), use([Ljava.lang.Object;), is(java.lang.Object), wait(), clone() at Script1.run(Script1.groovy:3)

我能够在线上在"Groovy沙箱"中重现这种行为:

I was able to reproduce this behaviour in "Groovy sandboxes" online:

在这里工作正常: groovy-操场(版本2.4.1.5)在此失败: groovyconsole (版本2.5.7)

Working fine here: groovy-playground (Version 2.4.1.5) Failing here: groovyconsole (Version 2.5.7)

在这种情况下，可行的替代方法是什么?我已经阅读了有关新的Date API的信息，但是找不到有关如何通过日期操作(例如+ 90天)使用它的详细信息.

What is the working alternative in this case? I have read about a new Date API, but couldn't find the details about how to use it, with date manipulation (+ 90 days for example).

推荐答案

我同意Ole V.V.关于使用新的日期/时间API的建议.这是您如何以更具Groovy风格编写他的Java示例的方法.

I agree with Ole V.V.'s recommendations to use the new Date/Time API. Here is how you would write his Java sample in a more Groovy style.

// you can assemble aggregate types by left shifting the aggregates
// I'm not endorsing this approach, necessarily, just pointing it out as an alternative 
ZonedDateTime now = LocalDate.now() << LocalTime.now() << ZoneId.of('Africa/Bamako')

// the plus operator is overloaded
ZonedDateTime in90Days = now + 90

// you can pass a String to format without needed a full DateTimeFormatter instance
println in90Days.format('uuuu-MM-dd HH:mm:ss.S')

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