scala 15 多重继承 AOP实现

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class Test extends ConsoleLogger{
def test{
log("Here is Spark!!!")
}

}

abstract class Account{
def save
}

class MyAccount extends Account with ConsoleLogger{
def save{
log("11")
}
}

class Human{
println("Human")
}
trait TTeacher extends Human {
println("TTeacher")
def teach
}
trait PianoPlayer extends Human {
println("PianoPlayer")
def playPiano = {println("I’m playing piano. ")}
}
class PianoTeacher extends Human with TTeacher with PianoPlayer {
override def teach = {println("I’m training students. ")}
}

//AOP
trait Action {
def doAction
}
trait TBeforeAfter extends Action {
abstract override def doAction {
println("Initialization")
super.doAction
println("Destroyed")
}
}

class Work extends Action{
override def doAction = println("Working...")
}

object UseTrait extends App{
// val t1 = new PianoTeacher
// t1.playPiano
// t1.teach
// val t2 = new Human with TTeacher with PianoPlayer {
// def teach = {println("I'm teaching students.")} }
// t2.playPiano
// t2 teach
val work = new Work with TBeforeAfter
work.doAction
// val logger = new ConcreteLogger with TraitLogger
//// val logger = new ConcreteLogger
// logger.concreteLog
// val logger = new Test
// logger.test;
//
// val account = new MyAccount with TraitLoggered
// account.save

}

转载于:https://www.cnblogs.com/trgaaaaa/p/4770621.html