2
我想比較LocalDateTime,但最終會出現異常。要導入什麼<在斯卡拉爲jodatime工作
我有這些類:
import org.scala_tools.time.Imports._
import org.scala_tools.time.Implicits._
case class Event(id: String, startDate: LocalDateTime, action: String)
case class Events(events: List[Event], timeout: Int) {
val timeoutDt: LocalDateTime = new LocalDateTime().minusMinutes(timeout)
lazy val oldEvents = events.filter { (e: Event) =>
e.startDate < timeoutDt
}
lazy val eventsToSend = events.filterNot { (e: Event) =>
e.startDate < timeoutDt
}
}
我得到這個異常:
scala> import org.scala_tools.time.Imports._
scala> import org.scala_tools.time.Implicits._
scala> val d1 = new LocalDateTime("2010-11-17T10:10:10")
d1: org.joda.time.LocalDateTime = 2010-11-17T10:10:10.000
scala> val d2 = new LocalDateTime("2012-11-17T10:10:10")
d2: org.joda.time.LocalDateTime = 2012-11-17T10:10:10.000
scala> val e1 = new Event("a", d1, "a")
scala> val e2 = new Event("b", d2, "b")
scala> val es = Events(List(e1, e2), 10000)
scala> val old = es.oldEvents
java.lang.NoClassDefFoundError: scala/Ordered
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at scala.tools.nsc.util.ScalaClassLoader$URLClassLoader.scala$tools$nsc$util$ScalaClassLoader$$super$findClass(ScalaClassLoader.scala:86)
at scala.tools.nsc.util.ScalaClassLoader$class.findClass(ScalaClassLoader.scala:51)
at scala.tools.nsc.util...
我忘記什麼?
=======編輯============
我使用Scala的2.8.0。由於@Alex,我發現,在project/build/Project.scala
文件的依賴是不正確的:
import java.io.File
import sbt._
class Project(info: ProjectInfo) extends DefaultProject(info) {
// ... omitted code
// OBS: Must have this to access snapshots
val snap = ScalaToolsSnapshots
// Time
lazy val jodaTime = "joda-time" % "joda-time" % "1.6"
lazy val scalaTime = "org.scala-tools" % "time" % "2.8.0-SNAPSHOT-0.2-SNAPSHOT" // Does not work
}
〜
下面的代碼工作:
import java.io.File
import sbt._
class Project(info: ProjectInfo) extends DefaultProject(info) {
// ... omitted code
// Time
lazy val jodaTime = "joda-time" % "joda-time" % "1.6"
lazy val scalaTime = "org.scala-tools.time" % "time_2.8.0" % "0.2"
}
不過不知道爲什麼快照沒有工作。
另外:你可以使用'partition'來使你的'Events'類更加簡潔。 http://paste.pocoo.org/show/293570/ – missingfaktor 2010-11-19 15:19:10
謝謝@missingfaktor我想我很着急,並沒有多想。 – 2010-11-19 15:19:58
請問你正在使用什麼樣的scala版本?我用你的代碼創建了一個小型sbt項目,它可以與scala 2.8.1一起使用。這裏是代碼https://gist.github.com/706675如果你想我可以上傳整個項目。 – fedesilva 2010-11-19 15:53:36