Groovy官網的文檔：

http://www.groovy-lang.org/groovy-dev-kit.html

package jerry;def date = LocalDate.parse('Jun 3, 04', 'MMM d, yy') assert date == LocalDate.of(2004, Month.JUNE, 3)def time = LocalTime.parse('4:45', 'H:mm') assert time == LocalTime.of(4, 45, 0)def offsetTime = OffsetTime.parse('09:47:51-1234', 'HH:mm:ssZ') assert offsetTime == OffsetTime.of(9, 47, 51, 0, ZoneOffset.ofHoursMinutes(-12, -34))def dateTime = ZonedDateTime.parse('2017/07/11 9:47PM Pacific Standard Time', 'yyyy/MM/dd h:mma zzzz') assert dateTime == ZonedDateTime.of(LocalDate.of(2017, 7, 11),LocalTime.of(21, 47, 0),ZoneId.of('America/Los_Angeles') )println 'time check done!'

這段代碼無法直接執行，報錯誤消息：

Caught: groovy.lang.MissingPropertyException: No such property: LocalDate for class: jerry.helloWorld groovy.lang.MissingPropertyException: No such property: LocalDate for class: jerry.helloWorldat jerry.helloWorld.run(helloWorld.groovy:3)at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

http://docs.groovy-lang.org/latest/html/groovy-jdk/java/time/package-summary.html

需要先導入java.time包：

如下圖，導入java.time.*之后，Eclipse里的LocalDate，LocalTime都高亮顯示了：

官網的代碼無法直接運行，需要把所有parse方法的第二個參數，即字符串類型的format:

def date = LocalDate.parse(‘Jun 3, 04’, ‘MMM d, yy’)

全部替換成用方法DateTimeFormatter.ofPattern返回：

package jerry;import java.time.* import java.time.format.DateTimeFormatterCharSequence sequence = 'Jun 3, 04'; java.time.format.DateTimeFormatter formatter = DateTimeFormatter.ofPattern('MMM d, yy');def date = LocalDate.parse(sequence, formatter)println( "formatted: " + date.toString())assert date == LocalDate.of(2004, Month.JUNE, 3)def time = LocalTime.parse('4:45', DateTimeFormatter.ofPattern('H:mm')) assert time == LocalTime.of(4, 45, 0)def offsetTime = OffsetTime.parse('09:47:51-1234', DateTimeFormatter.ofPattern('HH:mm:ssZ')) assert offsetTime == OffsetTime.of(9, 47, 51, 0, ZoneOffset.ofHoursMinutes(-12, -34))def dateTime = ZonedDateTime.parse('2017/07/11 9:47PM Pacific Standard Time', DateTimeFormatter.ofPattern('yyyy/MM/dd h:mma zzzz')) assert dateTime == ZonedDateTime.of(LocalDate.of(2017, 7, 11),LocalTime.of(21, 47, 0),ZoneId.of('America/Los_Angeles') )println 'time check done!'

修改后的代碼如下：

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